List of abbreviations in oil and gas exploration and production

This list is incomplete; you can help by adding missing items. (July 2014)

The

• 1C – Proved contingent resources
• 1oo2 – One out of two voting (instrumentation)
• 1P – Proven reserves
• 2C – Proved and probable contingent resources
• 2D – two-dimensional (geophysics)
• 2oo2 – Two out of two voting (instrumentation)
• 2oo2D – Two out of two voting with additional diagnostic detection capabilities (instrumentation)
• 2oo3 – Two out of three voting (instrumentation)
• 2ooN detection – to reach specified alarm limit when N ≥ 3 (instrumentation)
• 2P – proved and probable reserves
• 3C – three components seismic acquisition (x, y, and z)
• 3C – Proved, probable and possible contingent resources
• 3D – three-dimensional (geophysics)
• 3P – proved, probable and possible reserves
• 4D – multiple 3Ds acquired over time (the 4th D) over the same area with the same parameters (geophysics)
• 8rd – eight round (describes the number of revolutions per inch of pipe thread)

Symbol

• °API – degrees API (American Petroleum Institute) density of oil

A

• A – Appraisal (well)
• AADE – American Association of Drilling Engineers^[1]
• AAPG – American Association of Petroleum Geologists^[2]
• AAPL – American Association of Professional Landmen
• AAODC – American Association of Oilwell Drilling Contractors (obsolete; superseded by IADC)
• AAV – Annulus access valve
• ABAN – Abandonment, (also as AB and ABD and ABND)
• ABSA – Alberta Boilers Safety Association
• ABT – Annulus bore test
• ACC – Air-cooled heat condenser
• ACHE – Air-cooled heat exchanger
• ACOU – Acoustic
• ACP – Alkali-cosolvent-polymer
• ACQU – Acquisition log
• ACV – Automatic control valve
• ADE – Advanced decision-making environment
• ADEP – Awaiting development with exploration potential, referring to an asset
• ADROC – advanced rock properties report
• ADT – Applied drilling technology, ADT log
• ADM – Advanced diagnostics module (fieldbus)
• AER – Auto excitation regulator
• AEMO – Australian Energy Market Operator
• AFE – Authorization for expenditure, a process of submitting a business proposal to investors
• AFP – Active rire protection
• AGA – American Gas Association
• AGRU – acid gas removal unit
• AGT – (1) agitator, used in drilling
• AGT – (2) authorised gas tester (certified by OPITTO)
• AGT – (3) Azerbaijan – Georgia – Turkey (a region rich in oil related activity)^[3]
• AHBDF – along hole (depth) below Derrick floor
• AHD – along hole depth
• AHU – air handling unit
• AICD – autonomous inflow control device
• AIChemE – American Institute of Chemical Engineers
• AIM – asset integrity management
• AIPSM – asset integrity and process safety management
• AIR – assurance interface and risk
• AIRG – airgun
• AIRRE – airgun report
• AISC – American Institute of Steel Construction
• AISI – American Iron and Steel Institute
• AIT – analyzer indicator transmitter
• AIT – array induction tool
• AL – appraisal license (United Kingdom), a type of onshore licence issued before 1996
• ALAP – as low as possible (used along with density of mud)
• ALARP – as low as reasonably practicable
• ALC – vertical seismic profile acoustic log calibration report
• ALLMS – anchor leg load monitoring system
• ALQ – additional living quarters
• ALR – acoustic log report
• ALT – altered
• AM – asset management
• aMDEA – activated methyldiethanolamine
• AMS – auxiliary measurement service log; auxiliary measurement sonde (temperature)
• AMSL – above mean sea level
• AMI – area of mutual interest
• AMV – annulus master valve^[4]
• ANACO – analysis of core logs report
• ANARE – analysis report
• AOF – absolute open flow
• AOFP – absolute open-flow potential
• AOI – area of interest
• AOL – arrive on location
• AOR – additional oil recovery
• AP – alkali-polymer
• APD – application for permit to drill
• API – American Petroleum Institute: organization which sets unit standards in the oil and gas industry
• °API – degrees API (gravity of oil)
• APPRE – appraisal report
• APS – active pipe support
• APWD – annular pressure while drilling (tool) ^[5]
• ARACL – array acoustic log
• ARESV – analysis of reservoir
• ARI – azimuthal resistivity image
• ARRC – array acoustic report
• ART – actuator running tool
• AS – array sonic processing log
• ASD – acoustic sand detection
• ASI – ASI log^{[clarification needed]}
• ASME – American Society of Mechanical Engineers
• ASOG – activity-specific operating guidelines
• ASP – array sonic processing report
• ASP – alkali-surfactant-polymer
• ASTM – American Society for Testing and Materials
• ASCSSV – annulus surface controlled sub-surface valve^[4]
• ASV – anti-surge valve
• ASV – annular safety valve
• ASV – accommodation and support vessel
• ATD – application to drill
• ATU – auto top-up unit
• AUV – authonomus underwater vehicle
• AV – annular velocity or apparent viscosity
• AVGMS – annulus vent gas monitoring system
• AVO – amplitude versus offset (geophysics)
• AWB/V – annulus wing block/valve (XT)
• AWO – approval for well operation
• ATM – at the moment

B

• B or b – prefix denoting a number in billions
• BA – bottom assembly (of a riser)
• bbl – barrel
• bbl/MMscf – barrels per million standard cubic feet
• BBG – buy back gas
• BBSM –
  behaviour-based safety
  management
• BCPD – barrels condensate per day
• Bcf – billion cubic feet (of natural gas)
• Bcfe – billion cubic feet (of natural gas equivalent)
• BD – bursting disc
• BDF – below derrick floor
• BDL – bit data log
• BDV – blowdown valve
• BGL – borehole geometry log
• BGL – below ground level (used as a datum for depths in a well)
• BGS – British Geological Survey
• BGT – borehole geometry tool
• BGWP – base of ground-water protection
• BH – bloodhound
• BHA – bottom hole assembly (toolstring on coiled tubing or drill pipe)
• BHC – BHC gamma ray log^{[clarification needed]}
• BHCA – BHC acoustic log^{[clarification needed]}
• BHCS – BHC sonic log^{[clarification needed]}
• BHCT – bottomhole circulating temperature
• BHKA – bottomhole kickoff assembly
• BHL – borehole log
• BHP – bottom hole pressure
• BHPRP – borehole pressure report
• BHSRE – bottom hole sampling report
• BHSS – borehole seismic survey
• BHT – bottomhole temperature
• BHTV – borehole television report
• BINXQ – bond index quicklook log
• BIOR – biostratigraphic range log
• BIORE – biostratigraphy study report
• BSLM – bend stiffener latch mechanism
• BSW – base sediment and water
• BIVDL – BI/DK/WF/casing collar locator/gamma ray log
• BLD – bailed (refers to the practice of removing debris from the hole with a cylindrical container on a wireline)
• BLI – bottom of logging interval
• BLP – bridge-linked platform
• BO – back-off log
• BO – barrel of oil
• boe – barrels of oil equivalent
• boed – barrels of oil equivalent per day
• BOEM – Bureau of Ocean Energy Management
• boepd – barrels of oil equivalent per day
• BOB – back on bottom
• BOD – biological oxygen demand
• BOL – bill of lading
• BOM – bill of materials
• BOP – blowout preventer
• BOP – bottom of pipe
• BOPD – barrels of oil per day
• BOPE – blowout prevention equipment
• BOREH – borehole seismic analysis
• BOSIET – basic offshore safety induction and emergency training
• BOTHL – bottom hole locator log
• BOTTO – bottom hole pressure/temperature report
• BP – bridge plug
• BPD –
  barrels per day
• BPH – barrels per hour
• BPFL – borehole profile log
• BPLUG – baker plug
• BPM – barrels per minute
• BPV – back pressure valve (goes on the end of coiled tubing a drill pipe tool strings to prevent fluid flow in the wrong direction)
• BQL – B/QL log
• BRPLG – bridge plug log
• BRT – below rotary table (used as a datum for depths in a well)
• BS – bend stiffener
• BS – bumper sub
• BS – booster station
• BSEE – US: Bureau of Safety and Environmental Enforcement^[6] (formerly the MMS)
• BSG – black start generator
• BSR – blind shear rams (blowout preventer)
• BSML – below sea mean level
• BS&W – basic sediments and water
• BT – buoyancy tank
• BTEX – benzene, toluene, ethyl-benzene and xylene
• BTHL – bottom hole log
• BTO/C – break to open/close (valve torque)
• BTU –
  British thermal units
• BU – bottom up
• BUL – bottom-up lag
• BUR – build-up rate
• BVO – ball valve operator
• bwd – barrels of water per day (often used in reference to oil production)
• bwipd – barrels of water injected per day
• bwpd – barrels of water per day

C

• C&E – well completion and equipment cost
• C&S – cased and suspended
• C1 – methane
• C2 – ethane
• C3 – propane
• C4 – butane
• C6 –
  hexanes
• C7+ – heavy hydrocarbon components
• CA – core analysis log
• CAAF – contract authorization approval form
• CalGEM – California Geologic Energy Management Division (oil & gas regulatory body)
• CALI – caliper log
• CALOG – circumferential acoustic log
• CALVE – calibrated velocity log data
• CAODC – Canadian Association of Oilwell Drilling Contractors
• CAPP – Canadian Association of Petroleum Producers
• CAR – Company Appointed Representative
• CART – cam-actuated running tool (housing running tool)
• CART – cap replacement tool
• CAS – casing log
• CAT – connector actuating tool
• CB – casing bowl
• CB – core barrel
• CBF – casing bowl flange
• CBIL – CBIL log
• CBL – cement bond log (measurement of casing cement integrity)
• CBM – choke bridge module – XT choke
• CBM – conventional buoy mooring
• CBM – coal-bed methane
• CCHT – core chart log
• CCL – casing collar locator (in perforation or completion operations, the tool provides depths by correlation of the casing string's magnetic anomaly with known casing features)
• CCLBD – construction / commissioning logic block diagram
• CCLP – casing collar locator perforation
• CCLTP – casing collar locator through tubing plug
• CD – core description
• CDATA – core data
• CDIS – CDI synthetic seismic log
• CDU – control distribution unit
• CDU – crude distillation unit
• CDP – common depth point (geophysics)
• CDP – comprehensive drilling plan
• CDRCL – compensated dual resistivity cal. log
• CDF – core contaminated by drilling fluid
• CDFT – critical device function test
• CE – CE log^{[clarification needed]}
• CEC – cation-exchange capacity
• CECAN – CEC analysis^{[clarification needed]}
• CEME – cement evaluation
• CEOR – chemical-enhanced oil recovery
• CER – central electrical/equipment room
• CERE – cement remedial log
• CET – cement evaluation tool
• CF – completion fluid
• CF – casing flange
• CFD – computational fluid dynamics
• CFGPD – cubic feet of gas per day
• CFU – compact flotation unit
• CGEL – CG EL log^{[clarification needed]}
• CGL – core gamma log
• CGPA – Canadian Gas Processors Association
• CGPH – core graph log
• CGR – condensate gas ratio
• CGTL – compact gas to liquids (production equipment small enough to fit on a ship)
• CHCNC – CHCNC gamma ray casing collar locator
• CHDTP – calliper HDT playback log
• CHECK – checkshot and acoustic calibration report
• CHESM – contractor, health, environment and safety management
• CHF – casing head flange
• CHK – choke (a restriction in a flowline or a system, usually referring to a production choke during a test or the choke in the well control system)
• CHKSR – checkshot survey report
• CHKSS – checkshot survey log
• CHOPS – cold heavy oil production with sand
• CHP – casing hanger pressure (pressure in an
  annulus as measured at the casing hanger
  )
• CHOTO – commissioning, handover and takeover
• CHROM – chromatolog
• CHRT – casing hanger running tool
• CIBP – cast iron bridge plug
• CICR – cast iron cement retainer
• CIDL – chemical injection downhole lower
• CIDU – chemical injection downhole upper
• CIL – chemical injection line
• CILD – conduction log
• CIMV – chemical injection metering valve
• CIRC – circulation
• CITHP – closed-in tubing head pressure (tubing head pressure when the well is shut in)
• CIV – chemical injection valve
• CK – choke (a restriction in a flowline or a system, usually referring to a production choke during a test or the choke in the well control system)
• CL – core log
• CLG – core log and graph
• CM – choke module
• CMC – crown mounted compensators
• CMC – critical micelle concentration
• CMP – common midpoint (geophysics)
• CMR – combinable magnetic resonance (
  NMR log tool) ^[7][8]
• CMT – cement
• CNA – clay, no analysis
• CND – compensated neutron density
• CNFDP – CNFD true vertical-depth playback log
• CNGR – compensated neutron gamma-ray log
• CNL – compensated neutron log
• CNLFD – CNL/FDC log^[clarification needed]
• CNS – Central North Sea
• CNCF – field-normalised compensated neutron porosity
• CNR – Canadian natural resources
• CO – change out (ex. from rod equipment to casing equipment)
• COA – conditions of approval
• COC – certificate of conformance
• COD – chemical oxygen demand
• COL – collar log
• COMAN – compositional analysis
• COML – compaction log
• COMP – composite log
• COMPR – completion program report
• COMPU – computest report
• COMRE – completion record log
• COND – condensate production
• CONDE – condensate analysis report
• CONDR – continuous directional log
• CORAN – core analysis report
• CORE – core report
• CORG – corgun^{[check spelling]} log
• CORIB – CORIBAND log
• CORLG – correlation log
• COROR – core orientation report
• COW – Control of Work
• COXY – carbon/oxygen log
• CP – cathodic protection
• CP – crown plug
• cP – centipoise (viscosity unit of measurement)
• CPI separator – corrugated plate interceptor
• CPI – computer-processed interpretation
• CPI – corrugated plate interceptor
• CPICB – computer-processed interpretation coriband log
• CPIRE – computer-processed interpretation report
• CPP – central processing platform
• CRA – corrosion-resistant alloy
• CRET – cement retainer setting log
• CRI – cuttings reinjection
• CRINE – cost reduction in the new era
• CRP – control riser platform
• CRP – common/central reference point (subsea survey)
• CRT – clamp replacement tool
• CRT – casing running tool
• CSE – confined space entry
• CsF – caesium formate
• CSC – car seal closed
• CSG – coal seam gas
• csg – casing
• CSHN – cased-hole neutron log
• CSI – combinable seismic imager (VSP) log (Schlumberger)
• CSMT – core sampler tester log
• CSO – complete seal-off
• CSO – car seal open
• CSPG – Canadian Society of Petroleum Geologists
• CSR – corporate social responsibility
• CST – chronological sample taker log (Schlumberger)
• CSTAK – core sample taken log
• CSTR – continuously-stirred tank reactor
• CSTRE – CST report^{[clarification needed]}
• CSU – commissioning and start-up
• CSU – construction safety unit
• CSUG – Canadian Society for Unconventional Gas
• CT – coiled tubing
• CTD – coiled tubing drilling
• CTCO – coiled tubing clean-out
• CTLF – coiled tubing lift frame
• CTLF – compensated tension lift frame
• CTOD – crack tip opening displacement
• CTP – commissioning test procedure
• CTR – Critical Transport Rate
• CTRAC – cement tracer log
• CUI – corrosion under insulation
• CUL – cross-unit lateral
• CUT – cutter log
• CUTTD – cuttings description report
• CWOP – complete well on paper
• CWOR – completion work over riser
• CWR – cooling water return
• CWS – cooling water supply
• X/O – cross-over
• CYBD – Cyberbond log
• CYBLK – Cyberlook log
• CYDIP – Cyberdip log
• CYDN – Cyberdon log
• CYPRO – Cyberproducts log
• CVD – Cost versus Depth
• CVX – Chevron

D

• D – development
• D – Darcy, unit of permeability
• D&C – drilling and completions
• D&I – direction and inclination (MWD borehole deviation survey) ^[9]
• DAC – dipole acoustic log
• DARCI – Darci log
• DAS – data acquisition system
• DAT – wellhead housing drill-ahead tool
• DAZD – dip and azimuth display
• DBB – double block and bleed
• DBP – drillable bridge plug
• DBR – damaged beyond repair
• DC – drill centre
• DC – drill collar/collars
• DCAL – dual caliper log
• DCC – distance cross course
• DCS – distributed control system
• DD – directional driller or directional drilling
• DDC – daily drilling cost
• DDC – de-watering and drying contract
• DDBHC – DDBHC waveform log^{[clarification needed]}
• DDET – depth determination log
• DDM – derrick drilling machine (a.k.a. top drive)
• DDNL – dual det. neutron life log
• DDPT – drill data plot log
• DDPU – double drum pulling unit
• DDR – daily drilling report
• DEA – diethanolamine
• DECC –
  Department for Energy and Climate Change
  (UK)
• DECT – decay time
• DECT – down-hole electric cutting tool
• DEFSU – definitive survey report
• DEH – direct electrical heating
• DELTA – delta-T log^{[clarification needed]}
• DEN – density log
• DEPAN – deposit analysis report
• DEPC – depth control log
• DEPT – depth
• DESFL – deep induction SFL log
• DEV – development well, Lahee classification
• DEVLG – deviation log
• DEXP – D-exponent log
• DF – derrick floor
• DFI – design, fabrication and installation résumé
• DFIT – diagnostic fracture injection test
• DFPH – Barrels of fluid per hour
• DFR – drilling factual report
• DG/DG# – diesel generator ('#'- means identification letter or number of the equipment i.e. DG3 or DG#3 means diesel generator nr 3)
• DGA – diglycoamine
• DGDS – dual-gradient drilling systems
• DGP – dynamic geohistory plot (3D technique)^[10]
• DH – drilling history
• DHC – depositional history curve
• DHSV – downhole safety valve
• DHPG – downhole pressure gauge
• DHPTT – downhole pressure/temperature transducer
• DIBHC – DIS BHC log^{[clarification needed]}
• DIEGR – dielectric gamma ray log
• DIF – drill in fluids
• DIL – dual-induction log
• DILB – dual-induction BHC log
• DILL – dual-induction laterolog
• DILLS – dual-induction log-LSS
• DILSL – dual-induction log-SLS
• DIM – directional inertia mechanism
• DINT – dip interpretation
• DIP – dipmeter log
• DIPAR – dipole acoustic report
• DIPBH – dipmeter borehole log
• DIPFT – dipmeter fast log
• DIPLP – dip lithology pressure log
• DIPRE – dipmeter report
• DIPRM – dip removal log
• DIPSA – dipmeter soda log
• DIPSK – dipmeter stick log
• DIRS – directional survey log
• DIRSU – directional survey report
• DIS – DIS-SLS log
• DISFL – DISFL DBHC gamma ray log
• DISO – dual induction sonic log
• DL – development license (United Kingdom), a type of onshore license issued before 1996
• DLIST – dip-list log
• DLL – dual laterolog (deep and shallow resistivity)
• DLS – dog-leg severity (directional drilling)
• DM – dry mate
• DMA – dead-man anchor
• DMAS – dead-man auto-shear DMAS
• DMRP – density – magnetic resonance porosity (wireline tool)
• DMT – down-hole monitoring tool
• DNHO – down-hole logging
• DNV – Det Norske Veritas
• DOA – delegation of authority
• DOE – Department of Energy, United States
• DOGGR – Division of Oil, Gas, and Geothermal Resources (former name of California's regulatory entity for oil, gas, and geothermal production)
• DOPH – drilled-out plugged hole
• DOWRE – downhole report
• DP – drill pipe
• DP – dynamic positioning
• DPDV – dynamically positioned drilling vessel
• DPL – dual propagation log
• DPLD – differential pressure levitated device (or vehicle)
• DPRES – dual propagation resistivity log
• DPT – deeper pool test, Lahee classification
• DQLC – dipmeter quality control log
• DR – dummy-run log
• DR – drilling report
• DRI – drift log
• DRL – drilling
• DRLCT – drilling chart
• DRLOG – drilling log
• DRLPR – drilling proposal/progress report
• DRO – discovered resources opportunities
• DRPG – drilling program report
• DRPRS – drilling pressure
• DRREP – drilling report
• DRYRE – drying report
• DS – deviation survey, (also directional system)
• DSA – Double Studded Adapter
• DSCAN – DSC analysis report
• DSI – dipole shear imager
• DSL – digital spectralog (western atlas)
• DSPT – cross-plots log
• DST – drill-stem test
• DSTG – DSTG log
• DSTL – drill-stem test log
• DSTND – dual-space thermal neutron density log
• DSTPB – drill-stem test true vertical depth playback log
• DSTR – drill-stem test report
• DSTRE – drill-stem test report
• DSTSM – drill-stem test summary report
• DSTW – drill-stem test job report/works
• DSU – drill spacing unit
• DSV – diving support vessel or drilling supervisor
• DTI –
  dBERR
  , which was then superseded by DECC)
• DTPB – CNT true vertical-depth playback log
• DTT – depth to time
• DUC – drilled but uncompleted wells
• DVD – Depth versus Day
• DVT – differential valve tool (for cementing multiple stages)
• DWOP – drilling well on paper (a theoretical exercise conducted involving the service-provider managers)
• DWQL – dual-water quicklook log
• DWSS – dig-well seismic surface log
• DXC – DXC pressure pilot report

E

• E – exploration
• E&A – exploration and appraisal
• E&I – electrical and instrumentation
• E&P – exploration and production, another name for the upstream sector
• EA – exploration asset
• EAGE – European Association of Geoscientists and Engineers^[11]
• ECA – Easington Catchment Area
• ECD – equivalent circulating density
• EDG/EDGE – emergency diesel generator
• ECMS – electrical control and monitoring system
• ECMWF – European Centre for Medium-Range Weather Forecasts
• ECP – external casing packer
• ECRD – electrically-controlled release device (for abandoning stuck wireline tool from cable)
• ECT – external cantilevered turret
• EDG – Emergency Diesel Generator
• EDP – exploration drilling program report
• EDP – emergency disconnect pPackage
• EDP – emergency depressurisation
• EDPHOT – emergency drill pipe hang-off tool
• EDR – exploration drilling report
• EDR – electronic drilling recorder
• EDS – emergency disconnection sequence
• EEAR – emergency electrical auto restart
• EEHA – electrical equipment for hazardous areas (IECEx)
• EFL – electrical flying lead
• EFR – engineering factual report
• EHT – electric heat trace
• EGBE – ethylene glycol monobutyl ether (2-butoxyethanol)
• EGMBE – ethylene glycol monobutyl ether
• EHU – electro-hydraulic unit
• EIA – environmental impact assessment
• EI – Energy Institute
• ELEC TECH – electronics technician
• ELT – economic limit test
• EL – electric log
• EM – EMOP log^{[clarification needed]}
• EMCS – energy management and control systems
• EMD – equivalent mud density
• EMG – equivalent mud gradient
• EMOP – EMOP well site processing log^{[clarification needed]}
• EMP – electromagnetic propagation log
• EMR – electronic memory read-out
• EMS – environment measurement sonde (wireline multi-caliper) ^[12]
• EMW – equivalent mud weight
• EN PI – enhanced productivity index log
• ENG – engineering log
• ENGF – engineer factual report
• ENGPD – engineering porosity data
• Eni – Ente Nazionale Idrocarburi S.p.A. (Italy)^[13]
• ENJ – enerjet log
• ENMCS – electrical network monitoring and control system
• EODU – electrical and optical distribution unit
• EOFL – end of field life
• EOR – enhanced oil recovery
• EOT – end of tubing
• EOT – electric overhead travelling
• ELV – extra-low voltage
• EOW – end-of-well report
• EPCM/I – engineering procurement construction and management/installation
• EPCU – electrical power conditioning unit
• EPIDORIS – exploration and production integrated drilling operations and reservoir information system
• EPL – EPL log^{[clarification needed]}
• EPLG – epilog
• EPLPC – EPL-PCD-SGR log^{[clarification needed]}
• EPS – early production system
• EPT – electromagnetic propagation
• EPU – electrical power unit
• EPTNG – EPT-NGT log
• EPV – early production vessel
• ER(D) – extended reach (drilling)
• ERT – emergency response training
• ESD –
  emergency shutdown
• ESD – equivalent static density
• ESDV – emergency shutdown valve
• ESHIA – environmental, social and health impact assessment
• ESIA – environmental and social impact assessment
• ESP – electric submersible pump
• ETAP – Eastern Trough Area Project
• ETD – external turret disconnectable
• ETECH – electronics technician
• ETTD – electromagnetic thickness test
• ETU – electrical test unit
• EUE – external-upset-end (tubing connection)
• EUR – estimated ultimate recovery
• EVARE – evaluation report
• EWMP – earthworks/electrical works/excavation works management plan
• EWR – end-of-well report
• EXL – or XL, exploration licence (United Kingdom), a type of onshore licence issued between the first onshore licensing round (1986) and the sixth (1992)
• EXP – exposed
• EZSV – easy sliding valve (drillable packer plug)

F

• F&G –
  fire and gas
• FAC – factual report
• FAC – first aid case
• FACHV – four-arm calliper log
• FANAL – formation analysis sheet log
• FANG – friction angle
• FAR – field auxiliary room
• FAT – factory acceptance testing
• FB – full bore
• FBE – fusion-bonded epoxy
• FBHP – flowing bottom-hole pressure
• FBHT – flowing bottom-hole temperature
• FC – float collar
• FC – fail closed (valve or damper)
• FCGT – flood clean gauge test
• FCM – flow control module
• FCP – final circulating pressure
• FCV – flow control valve
• FCVE – F-curve log
• FDC – formation density log
• FDF – forced-draft fan
• FDP – field development plan
• FDS – functional design specification
• FDT – fractional dead time
• FEED – front-end engineering design
• FEL – from east line
• FER – field equipment room
• FER – formation evaluation report
• FEWD – formation evaluation while drilling
• FFAC – formation factor log
• FFM – full field model
• FG – fiberglass
• FGHT – flood gauge hydrotest
• FRP – fiberglass reinforced plastics
• FGEOL – final geological report
• FH – full-hole tool joint
• FI – final inspection
• FID – final investment decision
• FID – flame ionisation detection
• FIH – finish in hole (tripping pipe)
• FIL – FIL log^{[clarification needed]}
• FI(M) – free issue (materials)
• FINST – final stratigraphic report
• FINTP – formation interpretation
• FIP – flow-induced pulsation
• FIT – fairing intervention tool
• FIT – fluid identification test
• FIT – formation integrity test
• FIT – formation interval tester
• FIT – flow indicator transmitter
• FIV – flow-induced vibration
• FIV –
  formation isolation valve
• FJC – field joint coating
• FL – F log^{[clarification needed]}
• FL – fail locked (valve or damper)
• FL – fluid level
• FLAP –fluid level above pump
• FLB – field logistics base
• FLDF – flying lead deployment frame
• FLIV – flowline injection valve
• FLIV – flowline isolation valve
• FLET – flowline end termination
  • aFLET – actuated flowline end termination
• FLNG – floating liquefied natural gas
• FLOG – FLOG PHIX RHGX log^{[clarification needed]}
• FLOPR – flow profile report
• FLOT – flying lead orientation tool
• FLOW – flow and buildup test report
• FLRA – field-level risk assessment
• FLS – fluid sample
• FLT – fault (geology)
• FLT – flying lead termination
• FLTC – fail locked tending to close
• FLTO – fail locked tending to open
• FMD – flooded member detection
• FMEA – failure modes, & effects analysis
• FMECA – failure modes, effects, and criticality analysis
• FMI – formation micro imaging log (azimuthal microresistivity)
• FMP – formation microscan report
• FMP – Field Management Plan
• FMS – formation multi-scan log; formation micro-scan log
• FMS – flush-mounted slips
• FMT – flow management tool
• FMTAN – FMT analysis report^{[clarification needed]}
• FNL – from north line
• FO – fail open (valve or damper)
• FOBOT – fibre optic breakout tray
• FOET – further offshore emergency training
• FOF – face of flange
• FOH – finish out of hole (tripping pipe)
• FOSA – field operating services agreement
• FOSV – full-opening safety valve
• FPDM – fracture potential and domain modelling/mapping^[14][15]
• FPH – feet per hour
• FPIT – free-point indicator tool
• FPL – flow analysis log
• FPLP – freshman petroleum learning program (Penn State)^{[citation needed]}
• FPLAN – field plan log
• FPS – field production system
• FPO – floating production and offloading – vessel with no or very limited (process only) on-board produced fluid storage capacity.
• FPSO – floating production storage and offloading vessel
• FPU – floating processing unit
• FRA – fracture log
• FRARE – fracture report
• FRES – final reserve report
• FS – fail safe
• FSB – flowline support base
• FSI – flawless start-up initiative
• FSL – from south line
• FSLT – flexible sealine lifting tool
• FSO – floating storage offloading vessel
• FSR – facility status report
• FSU – floating storage unit
• FT – formation tester log
• FTHP – Flowing Tubing Head Pressure
• FTL – field team leader
• FTM – fire-team member
• FTP – first tranche petroleum
• FTP – field terminal platform
• FTR – function test report
• FTRE – formation testing report
• FULDI – full diameter study report
• FV – funnel viscosity
• FV – float valve
• FWHP – flowing well-head pressure
• FWKO – free water knock-out
• FWL – free water level
• FWL – from West line
• FWR – final well report
• FWV – flow wing valve (also known as production wing valve on a christmas tree)
• FR – flow rate

G

• G/C –
  gas condensate
• GC – gathering center
• G&P – gathering and processing
• G&T – gathering and transportation
• GALT – gross air leak test
• GAS – gas log
• GASAN – gas analysis report
• GBS – gravity-based structure
• GBT – gravity base tank
• GC – Gauge Cutter
• GCB – generator circuit breaker
• GCLOG – graphic core log
• GCT – GCT log^{[clarification needed]}
• GDAT – geodetic datum
• GDE – gross depositional environment
• GDIP – geodip log
• GDT – gas down to
• GE – condensate gas equivalent
• GE – ground elevation (also GR, or GRE^{[citation needed]})
• GEOCH – geochemical evaluation
• GEODY – GEO DYS log^{[clarification needed]}
• GEOEV – geochemical evaluation report
• GEOFO – geological and formation evaluation report
• GEOL – geological surveillance log
• GEOP – geophone data log
• GEOPN – geological well prognosis report
• GEOPR – geological operations progress report
• GEORE – geological report
• GGRG – gauge ring
• GIIP – gas initially in place
• GIH – go in hole
• GIP – gas in place
• GIS – geographic information system
• GL – gas lift
• GL – ground level
• GLE – ground level elevation (generally in metres above mean sea level^{[citation needed]})
• GLM – gas lift mandrel (alternative name for
  side pocket mandrel)
• GLR – gas-liquid ratio
• GLT – GLT log^{[clarification needed]}
• GLV – gas lift valve
• GLW –^{[citation needed]}
• GM – gas migration
• GOC – gas oil contact
• GOM – Gulf of Mexico
• GOP – geological operations report
• GOR –
  gas oil ratio
• GOSP – gas/oil separation plant
• GPIT – general-purpose inclinometry tool (borehole survey) ^[16]
• GPLT – geol plot log^{[clarification needed]}
• GPTG – gallons per thousand gallons
• GPM – gallons per Mcf^{[clarification needed]}
• GPSL – geo pressure log
• GR – ground level
• GR – gamma ray
• GR – gauge ring (measure hole size)
• GRAD – gradiometer log
• GRE – ground elevation
• GRLOG – grapholog
• GRN – gamma ray neutron log
• GRP – glass-reinforced plastic
• GRV – gross rock volume
• GRSVY – gradient survey log
• GS – gas supplier
• GS – gel strength
• GST – GST log^{[clarification needed]}
• GTC/G –gas turbine compressor/generator
• GTL – gas to liquids
• GTW – gas to wire
• GUN – gun set log
• GWC – gas-water contact
• GWR – guided wave radar
• GWREP – geo well report

H

• HAT – highest astronomical tide
• HAZ – heat-affected zone
• HAZID – hazard identification (meeting)
• HAZOP – hazard and operability study (meeting)
• HBE – high-build epoxy
• HBP – held by production
• HC – hydrocarbons
• HCAL – HRCC caliper (in logs)(in inches)^{[clarification needed]}
• HCCS – horizontal clamp connection system
• HCM – horizontal connection module (to connect the christmas tree to the manifold^{[citation needed]})
• HCS – high-capacity square mesh screens
• HD – head
• HDA – helideck assistant
• HDD –
  horizontal directional drilling
• HDPE – high-density polyethylene
• HDT – high-resolution dipmeter log
• HDU – horizontal drive unit
• HEXT – hex diplog
• HFE – human factors engineering
• HFL – hydraulic flying lead
• HGO – heavy gas oil
• HGS – high (wpecific-)gravity solids
• HH – horse head (on pumping unit)
• HHP – hydraulic horsepower
• HI – hydrogen index
• HiPAP – high-precision acoustic positioning
• HIPPS – high-integrity pressure protection system
• HIRA – hazard identification and risk assessment
• HISC – hydrogen-induced stress cracking
• HKLD – hook load
• HL – hook load
• HLCV – heavy-lift crane vessel
• HLO – heavy load-out (facility)
• HLO – helicopter landing officer
• Hmax – maximum wave height
• HNGS – flasked hostile natural gamma-ray spectrometry tool ^[17]
• HO – hole opener
• HOB – hang on bridle (cable assembly)
• HMR – heating medium return
• HMS – heating medium supply
• HP – hydrostatic pressure
• HPAM – partially hydrolyzed polyacrylamide
• HPGAG – high-pressure gauge
• HPHT – high-pressure high-temperature
• HPPS – HP pressure log^{[clarification needed]}
• HPU – hydraulic power unit
• HPWBM – high-performance water-based mud
• HRCC – HCAl of caliper (in inches)
• HRLA – high-resolution laterolog array (resistivity logging tool)
• HRF – hyperbaric rescue facility/vessel
• HRSG – heat recovery steam generator
• Hs – significant wave height
• HSE – health, safety and environment or
  Health & Safety Executive
  (United Kingdom)
• HSV – hyperbaric support vessel
• HTHP – high-temperature high pressure
• HTM – helideck team member
• HVDC – high voltage direct current
• HWDP – heavy-weight drill pipe (sometimes spelled hevi-wate^{[citation needed]})
• HUD – hold-up depth
• HUN – hold-up nipple
• HUET – helicopter underwater escape training
• HVAC – heating, ventilation and air-conditioning
• HWDP – heavy weight drill pipe
• HYPJ – hyperjet
• HYROP – hydrophone log

I

• I:P – injector to producer ratio
• IADC – International Association of Drilling Contractors
• IAT – internal active turret
• IBC – intermediate bulk container
• IC – instrument cable
• ICoTA – Intervention and Coiled Tubing Association
• ICC – isolation confirmation (or control) certificate
• ICD – inflow control device
• ICEX;IECEx – international electrotechnical commission system for certification to standards relating to equipment for use in explosive atmospheres (EEHA)
• ICP – initial circulating pressure
• ICP – intermediate casing point
• ICP – inductively coupled plasma
• ICSS – integrated controls and safety system
• ICSU – integrated commissioning and start-up
• ICV – interval control valve
• ICV – integrated cement volume (of borehole)
• ICW – incomplete work
• ID – inner or internal diameter (of a tubular component such as a
  casing
  )
• IDC – intangible drilling costs
• IDEL – IDEL log^{[clarification needed]}
• IEB – induction electro BHC log
• IEL – induction electrical log
• IF – internal flush tool joint
• iFLS – intelligent fast load shedding
• IFP – French Institute of Petroleum (Institut Français du Petrole)
• IFT – interfacial tension
• IGPE – immersion grade phenolic epoxy
• IGV – inlet guide vane
• IH – gamma ray log
• IHEC – isolation of hazardous energy certificate
• IHUC – installation, hook-up and commissioning
• IHV – integrated hole volume (of borehole)
• IIC – infield installation contractor
• IJL – injection log
• IL – induction log
• ILI – inline inspection (intelligent pigging)
• ILOGS – image logs
• ILT – inline tee
• IMAG – image analysis report
• IMCA – International Marine Contractors Association
• IMPP – injection-molded polypropylene coating system
• IMR – inspection, maintenance, and repair
• INCR – incline report
• INCRE – incline report
• INDRS – IND RES sonic log^{[clarification needed]}
• INDT – INDT log^{[clarification needed]}
• INDWE – individual well record report
• INJEC – injection falloff log
• INS – insufficient sample
• INS – integrated navigation system
• INSUR – inrun survey report
• INVES – investigative program report
• IOC – international oil company
• IOM – installation, operation and maintenance manual
• IOS – internal olefin sulfonate
• IOS – isomerized olefin sulfonate
• IP – ingress protection
• IP – Institute of Petroleum, now Energy Institute
• IP – intermediate pressure
• IPAA – Independent Petroleum Association of America
• IPC – installed production capacity
• IPLS – IPLS log^{[clarification needed]}
• IPR – inflow performance relationship
• IPT – internal passive turret
• IR – interpretation report
• IRC – inspection release certificate
• IRDV – intelligent remote dual valve
• IRTJ – IRTJ gamma ray slimhole log
• ISD – instrument-securing device
• ISF – ISF sonic log
• ISFBG – ISF BHC GR log^{[clarification needed]}
• ISFCD – ISF conductivity log
• ISFGR – ISF GR casing collar locator log
• ISFL – ISF-LSS log^{[clarification needed]}
• ISFP – ISF sonic true vertical depth playback log
• ISFPB – ISF true vertical depth playback log
• ISFSL – ISF SLS MSFL log^{[clarification needed]}
• ISIP – initial shut-in pressure
• ISSOW – integrated safe system of work
• ISV – infield support vessel
• ITD – internal turret disconnectable
• ITO – inquiry to order
• ITR – inspection test record
• ITS – influx to surface
• ITT – internal testing tool (for BOP test)
• IUG – instrument utility gas
• IWCF – International Well Control Federation
• IWOCS – installation/workover control system
• IWTT – interwell tracer test

J

• J&A – junked and abandoned
• JB – junk basket
• JHA – job hazard analysis
• JIB – joint-interest billing
• JLT – J-lay tower
• JSA – job safety analysis
• JT –
  Joule-Thomson
  (effect/valve/separator)
• JTS – joints
• JU –
  jack-up drilling rig
• JV – joint venture
• JVP – joint venture partners/participants

• KB – kelly bushing
• KBE – kelly bushing elevation (in meters above sea level, or meters above ground level)
• KBG – kelly bushing height above ground level
• KBUG – kelly bushing underground (drilling up in coal mines, West Virginia, Baker & Taylor drilling)
• KCI – potassium chloride
• KD – kelly down
• KMW – kill mud weight
• KOEBD – gas converted to oil-equivalent at 6 million cubic feet = 1 thousand barrels
• KOH – potassium hydroxide
• KOP – kick-off point (directional drilling)
• KOP – kick-off plug
• KP – kilometre post
• KRP – kill rate pressure
• KT – kill truck
• KLPD- kiloliters per day

L

• LACT – lease automatic custody transfer
• LAH – lookahead
• LAOT – linear activation override tool
• LARS – launch and recovery system
• LAS – Log ASCII standard
• LAT – lowest astronomical tide
• LBL – long baseline (acoustics)
• LC – locked closed
• LCM – lost circulation material
• LCNLG – LDT CNL gamma ray log
• LCR – local control room
• LCV – level control valve
• L/D – lay down (such as tubing or rods)
• LD – lay down (such as tubing or rods)
• LDAR – leak detection and repair
• LDHI – low-dosage hydrate inhibitor
• LDL – litho density log
• LDS – leak detection system (pipeline monitoring)
• LDTEP – LDT EPT gamma ray log
• LEAKL – leak detection log
• LEPRE – litho-elastic property report
• LER – lands eligible for remining or land equivalent ratio
• LER – Local Equipment Room
• LGO – Light Gas Oil
• LGR – Liquid Gas Ratio
• LGS – Low (specific-)Gravity Solids
• LHT- Left Hand Turn
• LIC – License
• LIB – Lead Impression Block
• LINCO – Liner and Completion Progress Report
• LIOG – Lithography Log
• LIT – Lead Impression Tool
• LIT – level indicator transmitter
• LITDE – Litho Density Quicklook Log
• LITHR – Lithological Description Report
• LITRE – Lithostratigraphy Report
• LITST – Lithostratigraphic Log
• LKO – Lowest Known Oil
• LL – Laterolog
• LMAP – Location Map
• LMRP – Lower Marine Riser Package
• LMTD – Log Mean Temperature Difference
• LMV – Lower Master Valve (on a Xmas tree)
• LNG –
  Liquefied Natural Gas
• LO – Locked Open
• LOA – Letter of Authorisation/Agreement/Authority
• LOD – Lines of Defence
• LOE – Lease Operating Expenses
• LOGGN – Logging Whilst Drilling
• LOGGS – Lincolnshire Offshore Gas Gathering System
• LOGRS – Log Restoration Report
• LOGSM – Log Sample
• LOK – Low Permeability
• LOKG – Low Permeability Gas
• LOKO – Low Permeability Oil
• LOLER – Lifting Operations and Lifting Equipment Regulations
• LOPA – Layers of protection analysis IEC 61511
• LOT – Leak-Off Test
• LOT – Linear Override Tool
• LOT – Lock Open Tool
• LOTO – Lock Out / Tag Out
• LP – Low Pressure
• LPG –
  Liquefied Petroleum Gas
• LPH – Litres Per Hour
• LPWHH – Low Pressure Well Head Housing
• LQ – Living Quarters
• LRA – Lower Riser Assembly
• LRG – Liquified Refinery Gas
• LRP – Lower Riser Package
• LSBGR – Long Spacing BHC GR Log
• LSD – Land Surface Datum
• LSP – Life Support Package
• LSSON – Long Spacing Sonic Log
• LT – Linear Time or Lag Time
• L&T – Load and Test
• LTC – Long Thread and Coupled
• LT&C – Long Thread and Coupled
• LTHCP – Lower Tubing Hanger Crown Plug
• LTI(FR) – Lost Time Incident (Frequency Rate)
• LTP – liner shaker, tensile bolting cloth, perforated panel backing
• LTX – Low temperature extraction unit
• LUMI – Luminescence Log
• LUN – Livening Up Notice
• LVEL – Linear Velocity Log
• LVOT – Linear Valve Override Tool
• LWD – Logging While Drilling
• LWOL – Last Well on Lease
• LWOP – Logging Well on Paper

M

• M or m – prefix designating a number in thousands (not to be confused with SI prefix M for
  milli
  )
• m – metre
• MAASP – maximum acceptable [or allowable] annular surface pressure
• MAC – multipole acoustic log
• MACL – multiarm caliper log
• MAE – major accident event
• MAGST – magnetostratigraphic report
• MAL – Master Acronym List
• MAOP – maximum allowable operating pressure
• MAP – metrol acoustic processor
• MARA – maralog
• MAST – sonic tool (for recording waveform)
• MAWP – maximum allowable working pressure
• MBC – marine breakaway coupling
• MBC – membrane brine concentrator
• Mbd – thousand barrels per day
• MBES – multibeam echosounder
• Mbod – thousand barrels of oil per day
• Mboe – thousand barrels of oil equivalent
• Mboed – thousand barrels of oil equivalent per day
• MBP – mixed-bed polisher
• Mbpd – thousand barrels of oil per day
• MBR – minimum bend radius
• MBRO – multi-bore restriction orifices
• MBT – methylene blue test
• MBWH – multi-bowl wellhead
• MCC – motor control centre
• MCD – mechanical completion dossier
• Mcf – thousand cubic feet of natural gas
• Mcfe – thousand cubic feet of natural gas equivalent
• MCHE – main cryogenic heat exchanger
• MCM – manifold choke module
• MCP – monocolumn platform
• MCS – manifold and connection system
• MCS – master control station
• MCSS – multi-cycle sliding sleeve
• mD –
  permeability
  , with units of area
• MD – measured depth
• MDO – marine diesel oil
• MDR – master document register
• MDRT – measured depth referenced to rotary table zero datum
• MD – measurements/drilling log
• MDEA –
  methyl diethanolamine
  (aMDEA)
• MDL – methane drainage licence (United Kingdom), a type of onshore licence allowing natural gas to be collected "in the course of operations for making and keeping safe mines whether or not disused"
• MDSS – measured depth referenced to mean sea level zero datum – "subsea" level
• MDT – modular formation dynamic tester, a tool used to get formation pressure in the hole (not borehole pressure which the PWD does). MDT could be run on Wireline or on the Drill Pipe
• MDR – mud damage removal (acid bullheading)
• MEA –
  monoethanolamine
• MEG – monoethylene glycol
• MEIC – Mechanical Electrical Instrumentation Commission
• MeOH – methanol (CH₃OH)
• MEPRL – mechanical properties log
• MER – Maximum Efficiency Rating
• MERCR – mercury injection study report
• MERG – merge FDC/CNL/gamma ray/dual laterolog/micro SFL log
• MEST – micro-electrical scanning tool ^[18]
• MF – marsh funnel (mud viscosity)
• MFCT – multifinger caliper tool
• MGL – magnelog
• MGS – Mud Gas Separator
• MGU – Motor Gauge Unit
• MGPS – marine growth prevention system
• MHWN – mean high water neaps
• MHWS – mean high water springs
• MLE – Motor Lead Extension
• MLH – mud liner hanger
• MIFR – mini frac log
• MINL – minilog
• MIPAL – micropalaeo log
• MIRU – move in and rig up
• MIST – minimum industry safety training
• MIT – mechanical integrity test
• MIYP – maximum internal yield pressure
• mKB – meters below kelly bushing
• ML – mud line (depth reference)
• ML – microlog, or mud log
• MLL – microlaterolog
• MLF – marine loading facility
• MLWN – mean low water neaps
• MLWS – mean low water springs
• mm – millimetre (SI unit)
• MM – prefix designating a number in millions (thousand-thousand)
• MMbod – million barrels of oil per day
• MMboe – million barrels of oil equivalent
• MMboed – million barrels of oil equivalent per day
• MMbpd – million barrels per day
• MMcf – million cubic feet (of natural gas)
• MMcfe – million cubic feet (of natural gas equivalent)
• MMcfge – million cubic feet (of natural gas equivalent)
• MMS – Minerals Management Service (United States)
• MMscfd – million standard cubic feet per day
• MMTPA – millions of metric tonnes per annum
• MMstb – million stock barrels
• MNP – merge and playback log
• MODU – mobile offshore drilling unit (either of jack-up drill rig or semi-submersible rig or drill ship)
• MOF – marine offloading facility
• MOPO – matrix of permitted operations
• MOPU – mobile offshore production unit (to describe jack-up production rig, or semi-submersible production rig, or floating production, or storage ship)
• MOT – materials/marine offloading terminal
• MOV – motor operated valve
• MPA – micropalaeo analysis report
• MPD – managed pressure drilling
• MPFM – multi-phase flow meter
• MPK – merged playback log
• MPP – multiphase pump
• MPQT – manufacturing procedure qualification test
• MPS – manufacturing procedure specification
• MPSP – maximum predicted surface pressure
• MPSV – multi-purpose support vessel
• MPV – multi-purpose vessel
• MQC – multi-quick connection plate
• MR – marine riser
• MR – mixed refrigerant
• MR – morning report
• MRBP – magna range bridge plug
• MRC – maximum reservoir contact
• MRCV – multi-reverse circulating valve
• MRIT – magnetic resonance imaging tool
• MRIRE – magnetic resonance image report
• MRP – material requirement planning
• MRR – material receipt report
• MRT – marine riser tensioners
• MRT – mechanical run test
• MRX – magnetic resonance expert (wireline
  NMR tool) ^[19]
• MSCT – mechanical sidewall coring tool [20]
• MSDS – material safety data sheet
• MSFL – micro SFL log; micro-spherically focussed log (resistivity)
• MSI – mechanical and structural inspection
• MSIP – modular sonic imaging platform (sonic scanner) ^[21]
• MSIPC – multi-stage inflatable packer collar^[22]
• MSL – mean sea level
• MSL – micro spherical log
• MSS – magnetic single shot
• MST – MST EXP resistivity log
• MSV – multipurpose support vessel
• MTBF – mean time between failures
• MT – motor temperature; DMT parameter for ESP motor
• MTO – material take-off
• MTT – MTT multi-isotope trace tool
• M/U – make up
• MUD – mud log
• MUDT – mud temperature log
• MuSol – mutual solvent
• MVB – master valve block on christmas tree
• MVC – minimum volume commitment
• MW – mud weight
• MWD – measurement while drilling
• MWDRE – measurement while drilling report
• MWP – maximum working pressure
• MWS –
  marine warranty survey

N

• NACE –
  National Association of Corrosion Engineers
• NAPE – Nigerian Association of Petroleum Explorationists
• NAM – North American
• NAPF – non-aqueous phase fluid
• NAPL – non-aqueous phase liquid
• NASA – non-active side arm (term used in North Sea oil for kill wing valve on a christmas tree)
• NAVIG – navigational log
• NB – nominal bore
• NCC – normally clean condensate
• ND – nipple down
• NDE – non-destructive examination
• NEFE – non-emulsifying iron inhibitor (usually used with hydrochloric acid^{[citation needed]})
• NEUT – neutron log
• NFG – 'no fucking good' used for marking damaged equipment,^{[citation needed]}
• NFI – no further investment
• NFW – new field wildcat, Lahee classification
• NG – natural gas
• NGDC – national geoscience data centre (United Kingdom)
• NGL – natural gas liquids
• NGR – natural gamma ray
• NGRC – national geological records centre (United Kingdom)
• NGS – NGS log^{[clarification needed]}
• NGSS – NGS spectro log
• NGT – natural gamma ray tool
• NGTLD – NGT LDT QL log^{[clarification needed]}
• NGLQT – NGT QL log^{[clarification needed]}
• NGTR – NGT ratio log
• NHDA – National Hydrocarbons Data Archive (United Kingdom)
• NHPV – net hydrocarbon pore volume
• NL-NG – No loss-no gain
• NMDC – non-magnetic drill collar
• NMHC – non-methane hydrocarbons
• NMR – nuclear magnetic resonance kog
• NMVOC – non-methane volatile organic compounds
• NNF – normally no flow
• NNS – northern North Sea
• NOISL – noise log
• NOC –
  National Oil Company
• NORM – naturally-occurring radioactive material
• NP – non-producing well
• NPD –
  Norwegian Petroleum Directorate
• NPS – nominal pipe size (sometimes NS)
• NPSH(R) – net-positive suction head (required)
• NPT – Non-Productive Time (used during drilling or well intervention operations mainly, malfunction of equipment or the lack of personnel competencies that result in loss of time, which is costly)
• NPV – net present value
• NRB – not required back
• NRPs – non-rotating protectors
• NRI – net revenue interest
• NRV – non-return valve
• NPW – new pool wildcat, Lahee classification
• NS – North Sea; can also refer to the
  Kuparuk Oil Field, Milne Point, Lisburne, and Point McIntyre among others^{[citation needed}
  ]
• NTHF – non-toxic high flash
• NTP –
  Normal temperature and pressure
• NTU – nephelometric turbidity unit
• NUBOP – nipple (ed),(ing) up blow-out preventer
• NUI – normally unattended installation
• NUMAR – nuclear and magnetic resonance – image log

• O&G – oil and gas
• O&M – operations and maintenance
• O/S – overshot, fishing tool
• OBCS – ocean bottom cable system
• OBDTL – OBDT log^[clarification needed]
• OBEVA – OBDT evaluation report
• OBM – oil-based mud
• OBO – operated by others
• OCIMF – Oil Companies International Marine Forum
• OCI – oil corrosion inhibitor (vessels)
• OCL – quality control log
• OCM – offshore construction manager
• OCS – offshore construction supervisor
• OCTG – oil country tubular goods (oil well casing, tubing, and drill pipe)^[23]
• OD – outer diameter (of a tubular component such as
  casing^{[citation needed}
  ])
• ODT – oil down to
• OFE – oil field equipment
• OFST – offset vertical seismic profile
• OEM – original equipment manufacturer
• OFIC – offshore interim completion certificate
• OGA – Oil and Gas Authority (UK oil and gas regulatory authority)
• OH – open hole
• OH – open hole log
• OHC – open hole completion
• OHD – open hazardous drain
• OHUT – offshore hook-up team
• OI – oxygen index
• OIM –
  offshore installation manager
• OLAF – offshore footless loading arm
• OMC – Offshore Material Coordinator
• OMRL – oriented micro-resistivity log
• ONAN – oil natural air natural cooled transformer
• ONNR – Office of Natural Resources Revenue (formerly MMS)
• OOE – offshore operation engineer (senior technical authority on an offshore oil platform^{[citation needed]})
• OOIP – original oil in place
• OOT/S – out of tolerance/straightness
• O/P – Over Pull
• OPITO – offshore petroleum industry training organization
• OPEC –
  Organization of Petroleum Exporting Countries
• OPL – operations log
• OPRES – overpressure log
• OPS – operations report
• ORICO – oriented core data report
• ORM – operability reliability maintainability
• ORRI – overriding royalty interest
• ORF – onshore receiving facility
• OS&D – over, short, and damage report
• OS – online survey
• OSA _ Offshore Safety Advisor
• OSV – offshore supply vessel
• OT – a well on test
• OT – off tree
• OTDR – optical time domain reflectometry
• OTIP – operational testing implementation plan
• OTL – operations team leader
• OTP – operational test procedure
• OTR – order to remit
• OTSG – one-time through steam generator
• OWC – oil-water contact
• OUT – outpost, Lahee classification
• OUT – oil up to
• OVCH – oversize charts
• OVID – offshore vessel inspection database

P

• P – producing well
• P&A – plug(ged) and abandon(ed) (well)
• PA – producing asset
• PA – polyamide
• PA – producing asset with exploration potential
• PACO – process, automation, control and optimisation
• PACU – packaged air conditioning unit
• PADPRT – pressure assisted drillpipe running tool
• PAGA – public address general alarm
• PAL – palaeo chart
• PALYN –
  palynological
  analysis report
• PAR – pre-assembled rack
• PAU – pre-assembled ynit
• PBDMS – playback DMSLS log^{[clarification needed]}
• PBHL – proposed bottom hole location
• PBR – polished bore receptacle (component of a
  completion string
  )
• PBD – pason billing system
• PBTD – plug back total depth
• PBU – pressure build-up (applies to integrity testing on valves^{[citation needed]})
• PCA – production concession agreement
• PCB – polychlorinated biphenyl
• PCCC – pressure containing anti‐corrosion caps
• PCCL – perforation casing collar locator log
• PCDC – pressure-cased directional (geometry i.e. borehole survey) MWD tool
• PCE – pressure control equipment
• PCDM – power and control distribution module
• PCKR – packer
• PCMS – polymer coupon monitoring system
• PCN – process control network
• PCO – pre-commission preparations (pipeline)
• PCOLL – perforation and collar
• PCP – progressing cavity pump
• PCP – possible condensate production
• PCPT – piezo-cone penetration test
• PCS – process control system
• PDC – perforation depth control
• PDC – polycrystalline diamond compact (a type of drilling bit)
• PDG/PDHG – permanent downhole gauge
• PDGB – permanent drilling guide base
• PDKL – PDK log^{[clarification needed]}
• PDKR – PDK 100 report^{[clarification needed]}
• PDM –positive displacement motor
• PDMS – permanent downhole monitoring system
• PDP – proved developed producing (reserves)
• PDP – positive displacement pump
• PDPM – power distribution protection module
• PDNP – proved developed not producing
• PDR – physical data room
• PDT – differential pressure transmitter
• PE – petroleum engineer
• PE – professional engineer
• PE – production engineer
• PE – polyethylene
• PE – product emulsion
• PE – production enhancement
• PEA – palaeo environment study report
• PED – pressure equipment directive
• PEDL – petroleum exploration and development licence (United Kingdom)
• PEFS – process engineering flow scheme
• PENL – penetration log
• PEP – PEP log^{[clarification needed]}
• PERC – powered emergency release coupling
• PERDC – perforation depth control
• PERFO – perforation log
• PERM – permeability
• PERML – permeability log
• PESGB – Petroleum Exploration Society of Great Britain
• PETA – petrographical analysis report
• PETD – petrographic data log
• PETLG – petrophysical evaluation log
• PETPM – petrography permeametry report
• PETRP – petrophysical evaluation report
• PEX – platform express toolstring (resistivity, porosity, imaging)
• PFC – perforation formation correlation
• PFD – process flow diagram
• PFD – probability of failure on demand
• PFE – plate/frame heat exchanger
• PFHE – plate fin/frame heat exchanger
• PFPG – perforation plug log
• PFREC – perforation record log
• PG – pressure gauge (report)
• PGC – Potential Gas Committee
• PGB – permanent guide base
• PGOR – produced gas oil ratio
• PGP – possible gas production
• PH – phasor log
• PHASE – phasor processing log
• PHB – pre-hydrated bentonite
• PHC – passive heave compensator
• PHOL – photon log
• PHPU – platform hydraulic power unit
• PHPA –
  partially hydrolyzed polyacrylamide
• PHYFM – physical formation log
• PI – productivity index
• PI – permit issued
• PI – pressure indicator
• P&ID – piping and instrumentation diagram
• PINTL – production interpretation
• PIP – pump intake pressure
• PIP – pipe in pipe
• PIT – pump intake temperature
• PJSM – pre-job safety meeting
• PL – production license
• PLEM – pipeline end manifold
• PLES – pipeline end structure
• PLET – pipeline end termination
• PLG – plug log
• PLR –
  pig launcher/receiver
• PLS – position location system
• PLSV – pipelay support vessel
• PLT – production logging tool
• PLTQ – production logging tool quick-look log
• PLTRE – production logging tool report
• PLQ – permanent living quarters
• PMI – positive material identification
• PMOC – project management of change
• PMR – precooled mixed refrigerant
• PMV – production master valve
• PNP – proved not producing
• POB – personnel on board
• POBM – pseudo-oil-based mud
• POD – plan of development
• POF – permanent operations facility
• POH – pull out of hole
• POOH – pull out of hole
• PON – petroleum operations notice (United Kingdom)
• POP – pump-out plug
• POP – possible oil production
• POP – place on production
• POR – density porosity log
• PORRT – pack off run retrieval tool
• POSFR – post-fracture report
• POSTW – post-well appraisal report
• POSWE – post-well summary report
• PP – DXC pressure plot log^{[clarification needed]}
• PP – pump pressure
• PPA – Pounds of Proppant added
• PP&A – permanent plug and abandon (also P&A^{[citation needed]})
• ppb – pounds per barrel
• PPC – powered positioning caliper (Schlumberger dual-axis wireline caliper tool)^[24]
• ppcf – pounds per cubic foot
• PPD – pour point depressant
• PPE – preferred pressure end
• PPE – personal protective equipment
• PPFG – pore pressure/fracture gradient
• ppg – pounds per gallon
• PPI – post production inspection/intervention
• PPI – post pipelay installation
• PPL – pre-perforated liner
• pptf – pounds (per square inch) per thousand feet (of depth) – a unit of fluid density/pressure^{[citation needed]}
• PPS – production packer setting
• PPU – pipeline process and umbilical
• PQR – procedure qualification record
• PR2 – testing regime to API6A annex F^{[clarification needed]}
• PRA – production reporting and allocation
• PREC – perforation record
• PRESS – pressure report
• PRL – polished rod liner
• PRV – pressure relief valve
• PROD – production log
• PROTE – production test report
• PROX – proximity log
• PRSRE – pressure gauge report
• PSANA – pressure analysis
• PSA – production service agreement
• PSA – production sharing agreement
• PSC – production sharing contract
• PSD – planned shutdown
• PSD – pressure safety device
• PSD –
  process shutdown
• PSD – pump setting depth
• PSE – pressure safety element (rupture disc)
• PSIA – pounds per square inch atmospheric
• PSIG – pounds per square inch gauge
• PSL – product specification level
• PSLOG – pressure log
• PSM – process safety management
• PSP – pseudostatic spontaneous potential
• PSP – positive sealing plug
• PSPL – PSP leak detection log
• PSSR – pre-startup safety review
• PSSR – pressure systems safety regulations (UK)
• PSQ – plug squeeze log
• PST – PST log^{[clarification needed]}
• PSV – pipe/platform supply vessel
• PSV – pressure safety valve
• PSVAL – pressure evaluation log
• PTA/S – pipeline termination assembly/structure
• PTO – permit to sperate
• PTRO – test rack opening pressure (For a gas lift valve^{[citation needed]})
• PTSET – production test setter
• PTTC – Petroleum Technology Transfer Council, United States
• PTW – permit to work
• PU – pick-up (tubing, rods, power swivel, etc.)
• PUD – proved undeveloped reserves
• PUN – puncher log
• PUR – plant upset report
• PUQ – production utilities quarters (platform)
• PUWER – Provision and Use of Work Equipment Regulations 1998
• PV – plastic viscosity
• PVDF – polyvinylidene fluoride
• PVSV –pressure vacuum safety valve
• PVT – pressure volume temperature
• PVTRE – pressure volume temperature report
• PW – produced water
• PWD – pressure while drilling
• PWB – production wing block (XT^{[clarification needed]})
• PWHT – post-weld heat treat
• PWRI – produced water reinjection
• PWV – production wing valve (also known as a flow wing valve on a christmas tree^{[citation needed]})

Q

• QA – quality assurance
• QC – quality control
• QCR – quality control report
• QL – quick-look log
• QJ - Quad Joint

R

• R/B – rack back
• R&M – repair and maintenance
• RAC – ratio curves
• RACI – responsible / accountable / consulted / informed
• RAT – riser assembly tower
• RAM – reliability, availability, and maintainability
• RAWS – raw stacks VSP log^{[clarification needed]}
• RBI – risk-based inspection
• RBP – retrievable bridge plug
• RBS – riser base spool
• RCA – root cause analysis
• RCKST – rig checkshot
• RCD – rotating control device
• RCI – reservoir characterization instrument (for downhole fluid measurements e.g. spectrometry, density)^[25]
• RCL – retainer correlation log
• RCM – reliability-centred maintenance
• RCR – remote component replacement (tool)
• RCU – remote control unit
• RDMO – rig down move out
• RDS – ROV-deployed sonar^{[clarification needed]}
• RDRT – rig down rotary tools
• RDT – reservoir description tool
• RDVI – remote digital video inspection
• RDWL – rig down wireline
• RE – reservoir engineer
• REOR – reorientation log
• RE-PE – re-perforation report
• RESAN – reservoir analysis
• RESDV – riser emergency shutdown valve
• RESEV – reservoir evaluation
• RESFL – reservoir fluid
• RESI – resistivity log
• RESL – reservoir log
• RESOI – residual oil
• REZ – renewable energy zone (United Kingdom)
• RF – recovery factor
• RFCC – ready for commissioning certificate
• RFLNG – ready for liquefied natural gas
• RFM – riser feeding machine
• RFMTS – repeat formation tester
• RFO – ready for operations (pipelines/cables)
• RFR – refer to attached (e.g., letter, document)
• RFSU – ready for start-up
• RFT – repeat formation tester
• RFTRE – repeat formation tester report
• RFTS – repeat formation tester sample
• RHA – riser heel anchor
• RHD – rectangular heavy duty – usually screens used for shaking^{[citation needed]}
• RHT – Right Hand Turn
• RIGMO – rig move
• RIH – run in hole
• RIMS – riser integrity monitoring system
• RITT – riser insertion tube (tool)
• RKB – rotary kelly bushing (a datum for measuring depth in an oil well^{[citation needed]})
• RLOF – rock load-out facility
• RMLC – request for mineral land clearance
• RMP – reservoir management plan
• RMS – ratcheting mule shoe
• RMS – riser monitoring system
• RNT – RNT log^{[clarification needed]}
• ROB – received on board (used for fuel/water received in bunkering operations^{[citation needed]})
• ROCT – rotary coring tool
• ROP – rate of penetration
• ROP – rate of perforation
• ROT – remote-operated tool
• ROV/WROV – remotely-operated vehicle/work class remotely-operated vehicle, used for
  subsea construction and maintenance^{[citation needed}
  ]
• ROZ – recoverable oil zone
• ROWS – remote operator workstation
• RPCM – ring pair corrosion monitoring
• RPM – revolutions per minute (rotations per minute)
• RRC – Railroad Commission of Texas (governs oil and gas production in Texas)
• RROCK – routine rock properties report
• RRR – reserve replacement ratio
• RSES – responsible for safety and environment on site
• RSPP – a publicly-traded oil and gas producer focused on horizontal drilling of multiple stacked pay zones in the oil-rich Permian basin^{[citation needed][clarification needed]}
• RSS – rig site survey
• RSS – rotary steerable systems
• RST – reservoir saturation tool (Schlumberger) log
• RTMS – riser tension monitoring system
• RTE – rotary table elevation
• RTO – real-time operation
• RTP/RTS – return to production/service
• RTTS – retrievable test-treat-squeeze (packer)
• RU – rig up
• RURT – rig up rotary tools
• RV – relief valve
• RVI – remote video inspection
• RWD – reaming while drilling

S

• SABA – supplied air-breathing apparatus
• SAFE – safety analysis function evaluation
• SAGD – steam-assisted gravity drainage
• SALM – single anchor loading mooring
• SAM – subsea accumulator module
• SAML – sample log
• SAMTK – sample-taker log
• SANDA – sandstone analysis log
• SAPP – sodium acid pyrophosphate
• SAS – safety and automation system
• SAT – SAT log^{[clarification needed]}
• SAT – site acceptance test
• SB – SIT-BO log^{[clarification needed]}
• SBF – synthetic base fluid
• SBM – synthetic base mud
• SBT – segmented bond tool
• SC – seismic calibration
• SCADA – supervisory control and data acquisition
• SCAL – special core analysis
• SCAP – scallops log
• SCBA – self-contained breathing apparatus
• SCUBA – self-contained underwater breathing apparatus
• SCC – system completion certificate
• SCD – system control diagram
• SCDES – sidewall core description
• scf – standard cubic feet (of gas^{[citation needed]})
• scf/STB – standard cubic feet (of gas) / stock tank barrel (of fluid)^{[citation needed]}
• SCHLL – Schlumberger log^{[clarification needed]}
• SCM(MB) – subsea control module (mounting base^{[citation needed]})
• SCO –
  synthetic crude oil
• SCO – sand clean-out
• SCR – slow circulation rate
• SCR – steel catenary riser
• SCRS – slow circulation rates
• SCSG – type of pump
• SCSSV – surface-controlled subsurface safety valve
• SDON – shut down overnight
• SPCU – subsea control unit
• SCVF – surface casing vent flow. It's kind of test^{[citation needed]}
• SD – sonic density
• SDFD – shut down for day
• SDFN – shut down for night
• SDIC – sonic dual induction
• SDL – supplier document list
• SDM/U – subsea distribution module/unit
• SDPBH – SDP bottom hole pressure report
• SDSS – super duplex stainless steel
• SDT – step draw-down test (sometimes SDDT^{[citation needed]})
• SDU/M – subsea distribution unit/module
• SEA – strategic environmental assessment (United Kingdom)
• SECGU – section gauge log
• SEDHI – sedimentary history
• SEDIM – sedimentology
• SEDL – sedimentology log
• SEDRE – sedimentology report
• SEG – Society of Exploration Geophysicsists
• SEM – subsea electronics module
• Semi (or semi-sub^{[citation needed]}) – semi-submersible drilling rig
• SEP – surface emissive power
• SEPAR – separator sampling report
• SEQSU – sequential survey
• SF – Self Flowing
• SFERAE – global association for the use of knowledge on fractured rock in a state of stress, in the field of energy, culture and environment^[26]
• SFL – steel flying lead
• SG – static gradient, specific gravity
• SGR – shale gouge ratio
• SGS – steel gravity structure
• SGSI – Shell Global Solutions International
• SGUN – squeeze gun
• SHA – sensor harness assembly
• SHC – system handover certificate
• SHDT – stratigraphic high resolution dipmeter tool
• SHINC – sunday holiday including
• SHO – stab and hinge over
• SHOCK – shock log
• SHOWL – show log
• SHT – shallow hole test
• SI – shut in well
• SI – structural integrity
• SI – scale inhibitor
• SIBHP – Shut in Bottom-Hole Pressure
• SIBHT – Shut in Bottom-Hole Temperature
• SID – Specific Instruction Document/ Standard Instruction for Drillers
• SIT – System Integrity Test
• SI/TA – shut in/temporarily abandoned
• SIA – social impact assessment
• SIC – subsea installation contractor
• SICP – shut-in casing pressure
• SIDPP – shut-in drill pipe pressure
• SIDSM – sidewall sample
• SIF – safety instrumented functions (test^{[citation needed]})
• SIGTTO – Society of International Gas Tanker and Terminal Operators
• SIL – safety integrity level
• SIMCON – simultaneous construction
• SIMOPS – simultaneous operations
• SIP – shut-in pressure
• SIPCOM – simultaneous production and commissioning
• SIPES – Society of Independent Professional Earth Scientists, United States
• SIPROD – simultaneous production and drilling
• SIS – safety-instrumented system
• SIT – system integration test FR SIT – field representation SIT^{[clarification needed]}
• SIT – (casing) shoe integrity test
• SITHP – shut-in tubing hanger/head pressure
• SITT – single TT log^{[clarification needed]}
• SIWHP – shut-in well head pressure
• SKPLT – stick plot log
• SL – seismic lines
• SLS – SLS GR log^{[clarification needed]}
• SLT – SLT GR log^{[clarification needed]}
• SM or S/M – safety meeting
• SMA – small amount
• SMLS – seamless PipeMPP^{[clarification needed]}
• SMO – suction module
• SMPC – subsea multiphase pump, which can increase flowrate and pressure of the untreated wellstream^{[citation needed]}
• SN – seat nipple
• SNAM – Societá Nazionale Metanodotti now Snam S.p.A. (Italy)^[27]
• SNP – sidewall neutron porosity
• SNS – southern North Sea
• S/O – Slack Off
• SOBM – synthetic oil-based mud
• SOLAS – safety of life at sea
• SONCB – sonic calibration log
• SONRE – sonic calibration report
• SONWR – sonic waveform report
• SONWV – sonic waveform log
• SOP – Safe Operating Procedure
• SOP – shear-out plug
• SOR – senior operations representative
• SOW – slip-on wellhead
• SP – set point
• SP – shot point (geophysics)
• SP – spontaneous potential (well log)
• SPAMM – subsea pressurization and monitoring manifold
• SPCAN – special core analysis
• SPCU – subsea power and control unit
• SPE – Society of Petroleum Engineers^[28]
• SPEAN – spectral analysis
• SPEL – spectralog
• spf – shots per foot (perforation density)
• SPFM – single-phase flow meter
• SPH – SPH log^{[clarification needed]}
• SPHL – self-propelled hyperbaric lifeboats
• SPM –
  side pocket mandrel
• SPM – strokes per minute (of a positive-displacement pump^{[citation needed]})
• spm – shots per meter (perforation density^{[citation needed]})
• SPMT – self-propelled modular transporter
• SPOP – spontaneous potential log
• SPP – stand pipe pressure
• SPR – slow pumping rate
• SPROF – seismic profile
• SPS – subsea production systems
• SPT – shallower pool test, Lahee classification^{[citation needed]}
• SPUD – spud date (started drilling well)
• SPWLA – Society of Petrophysicists and Well Log Analysts^[29]
• SQL – seismic quicklook log
• SQZ – squeeze job
• SR – shear rate
• SRD – seismic reference datum, an imaginary horizontal surface at which TWT^{[clarification needed]} is assumed to be zero^{[citation needed]}
• SREC – seismic record log
• SRJ – semi-rigid jumper
• SRK – Soave-Redlich-Kwong
• SRO – surface read-out
• SRP – sucker rod pump
• SRB – sulfate-reducing bacteria
• SRT – site receival test
• SS – subsea, as in a datum of depth, e.g. TVDSS (true vertical depth subsea)^{[citation needed]}
• SSCC – sulphide stress corrosion cracking
• SSCP – subsea cryogenic pipeline
• SSCS – subsea control system
• SSD – sub-sea level depth (in metres or feet, positive value in downwards direction with respect to the geoid^{[citation needed]})
• SSD – sliding sleeve door
• SSFP – subsea flowline and pipeline
• SSG – sidewall sample gun
• SSH – steam superheater
• SSIC – safety system inhibit certificate
• SSIV – subsea isolation valve
• SSTV – subsea test valve
• SSM – subsea manifolds
• SSMAR – synthetic seismic marine log
• SSPLR –
  subsea pig launcher/receiver
• SSSL – Supplementary Seismic Survey Licence (United Kingdom), a type of onshore licence^{[citation needed]}
• SSSV – sub-surface safety valve
• SSTT – subsea test tree
• SSU – subsea umbilicals
• SSV – surface safety valve
• SSWI – subsea well intervention
• STAB – stabiliser
• STAGR – static gradient survey report
• STB – stock tank barrel
• STC – STC log^{[clarification needed]}
• STD – 2-3 joints of tubing^{[citation needed]}
• STFL – steel tube fly lead
• STG – steam turbine generator
• STGL – stratigraphic log
• STHE – shell-and-tube heat exchanger
• STIMU – stimulation report
• STKPT – stuck point
• STL – STL gamma ray log^{[clarification needed]}
• STL – submerged turret loading
• STRAT – stratigraphy, stratigraphic
• STRRE – stratigraphy report
• STOIIP – stock tank oil initially in place
• STOOIP – stock tank oil originally in place
• STOP – safety training observation program
• STP – submerged turret production
• STP – standard temperature and pressure
• STSH – string shot
• STTR – single top tension riser
• ST&C – short thread and coupled
• STC – short thread and coupled
• STU – steel tube umbilical
• STV – select tester valve
• SUML – summarised log^{[clarification needed]}
• SUMRE – summary report
• SUMST – geological summary sheet
• SURF – subsea/umbilicals/risers/flowlines
• SURFR – surface sampling report
• SURRE – survey report
• SURU – start-up ramp-up
• SURVL – survey chart log
• SUT(A/B) – subsea umbilical termination (assembly/box)
• SUTA – subsea umbilical termination assembly
• SUTU – subsea umbilical termination unit
• SW – salt water
• SWC – side wall core
• SWD – salt water disposal well
• SWE – senior well engineer
• SWHE – spiral-wound heat exchanger
• SWOT – strengths, weaknesses, opportunities, and threats
• SWT – surface well testing
• SV – sleeve valve, or standing valve
• SVLN – safety valve landing nipple
• SWLP – seawater lift pump
• SYNRE – synthetic seismic report
• SYSEI – synthetic seismogram log

T

• T – well flowing to tank
• T/T – tangent to tangent
• TA – temporarily abandoned well
• TA – top assembly
• TAC – tubing anchor (or tubing–annulus communication)
• TAGOGR – thermally assisted gas/oil gravity drainage
• TAN – total acid number
• TAPLI – tape listing
• TAPVE – tape verification
• TAR – true amplitude recovery
• TB – tubing puncher log
• TBE – technical bid evaluation
• TBG – tubing
• TBT – through bore tree / toolbox talk
• TCA – total corrosion allowance
• TCC – tungsten carbide coating
• TCCC – transfer of care, custody and control
• TCF – temporary construction facilities
• TCF – trillion cubic feet (of gas^{[citation needed]})
• TCI – tungsten carbide insert (a type of rollercone drillbit^{[citation needed]})
• TCP – tubing conveyed perforating (gun)
• TCPD – tubing-conveyed perforating depth
• TCU – thermal combustion unit
• TD – target depth
• TD – total depth (depth of the end of the well; also a verb, to reach the final depth, used as an acronym in this case^{[citation needed]})
• TDD – total depth (driller)
• TDC – total drilling cost
• TDL – total depth (logger)
• TDM – touch-down monitoring
• TDP – touch-down point
• TDS – top drive system
• TDS – total dissolved solids
• TDT – thermal decay time log
• TDTCP – TDT CPI log^{[clarification needed]}
• TDT GR – TDT gamma ray casing collar locator log
• TEA – triethanolamine
• TEFC – totally enclosed fan-cooled
• TEG – triethylene glycol
• TEG – thermal electric generator
• TELER – teledrift report
• TEMP – temperature log
• TETT – too early to tell
• TFE – total fina elf (obsolete; Now
  Total S.A.) major French multinational oil company^[30]
• TFL – through flow line
• TFM – TaskForceMajella research project
• TFM – tubular feeding machine
• TGB – temporary guide base
• TGT / TG – tank gross test
• TGOR – total gas oil ratio (GOR uncorrected for gas lift gas present in the production fluid^{[citation needed]})
• TH – tubing hanger
• THCP – tubing hanger crown plug
• Thr/Th# – thruster ('#'- means identification letter/number of the equipment, e.g. thr3 or thr#3 means "thruster no. 3"^{[citation needed]})
• THD – tubing head
• THERM – thermometer log
• THF – tubing hanger flange
• THF – tetrahydrofuran (organic solvent)
• THP – tubing hanger pressure (pressure in the production tubing as measured at the tubing hanger^{[citation needed]})
• THRT – tubing hanger running tool
• THS – tubing head spool
• TIE – tie-in log
• TIH – trip into hole
• TIS – tie-in spool
• TIT – tubing integrity test
• TIW – Texas Iron Works (pressure valve^{[citation needed]})
• TIEBK – tieback report
• TLI – top of logging interval
• TLOG – technical log
• TLP – tension-leg platform
• TMCM – transverse mercator central meridian
• TMD – total measured depth in a wellbore
• TNDT – thermal neutron decay time
• TNDTG – thermal neutron decay time/gamma ray log
• TOC – top of cement
• TOC – Total organic carbon
• TOF – top of fish
• TOFD – time of first data sample (on seismic trace^{[citation needed]})
• TOFS – time of first surface sample (on seismic trace)
• TOH – trip out of hole
• TOOH – trip out of hole
• TOL – top of liner
• TOL _ Top of Lead Cement
• TORAN – torque and drag analysis
• TOT – Top of Tail Cement
• TOVALOP – tanker owners' voluntary agreement concerning liability for oil pollution
• TPC – temporary plant configuration
• TPERF – tool performance
• TQM – total quality management
• TR – temporary refuge
• TRCFR – total recordable case frequency rate
• TRT – tree running tool
• TR – temporary refuge
• TRA – top riser assembly
• TRA – tracer log
• TRACL – tractor log
• TRAN –transition zone
• TRD – total report data
• TREAT – treatment report
• TREP – test report
• TRIP – trip condition log
• TRS – tubing running services
• TRSV – tubing-retrievable safety valve
• TRSCSSV – tubing-Retrievable surface-controlled sub-surface valve
• TRSCSSSV – tubing-retrievable surface-controlled sub-surface safety valve
• TSA – thermally-sprayed aluminium
• TSA – terminal storage agreement
• TSI – temporarily shut in
• TSJ – tapered stress joint
• TSOV – tight shut-off valve
• TSS – total suspended solids
• TSTR – tensile strength
• TT – torque tool
• TT – transit time log
• TTOC – theoretical top of cement
• TTVBP – through-tubing vented bridge plug
• TTRD – through-tubing rotary drilling
• TUC – topside umbilical connection
• TUC – turret utility container
• TUM – tracked umbilical machine
• TUPA – topside umbilical panel assembly
• TUTA – topside umbilical termination box/unit/assembly (TUTU^{[citation needed]})
• TVBDF – true vertical depth below derrick floor
• TV/BIP – ratio of total volume (ore and overburden) to bitumen in place
• TVD – true vertical depth
• TVDPB – true vertical depth playback log
• TVDRT – true vertical depth (referenced to) rotary table zero datum
• TVDKB – true vertical depth (referenced to) top kelly bushing zero datum
• TVDSS – true vertical depth (referenced to) mean sea level zero datum
• TVELD – time and velocity to depth
• TVRF – true vertical depth versus repeat formation tester
• TWT – two-way time (seismic)
• TWTTL – two-way travel time log

U

• UBHO – universal bottom hole orientation (sub)
• UBI – ultrasonic borehole imager
• UBIRE – ultrasonic borehole imager report
• UCH – umbilical connection housing
• UCIT – ultrasonic casing imaging tool (high resolution casing and corrosion imaging tool^{[citation needed]})
• UCL – unit control logic
• UCR – unsafe condition report
• UCS – unconfined compressive strength
• UCSU – upstream commissioning and start-up
• UFJ – upper flex joint
• UFR – umbilical flow lines and risers
• UGF – universal guide frame
• UIC – underground injection control
• UKCS – United Kingdom continental shelf
• UKOOA –
  United Kingdom Offshore Operators Association
• UKOOG – United Kingdom Onshore Operators Group
• ULCGR – uncompressed LDC CNL gamma ray log
• UMCA – umbilical midline connection assembly
• UMV – upper master valve (from a christmas tree^{[citation needed]})
• UPB – unmanned production buoy
• UPL – upper pressure limit
• UPR – upper pipe ram
• UPT – upper pressure threshold
• URA – upper riser assembly
• URT – universal running tool
• USBL –
  ultra-short baseline
  systems
• USIT – ultrasonic imaging tool (cement bond logging, casing wear logging)^[31]
• USGS – United States Geological Survey
• UTA/B – umbilical termination assembly/box
• UTAJ – umbilical termination assembly jumper
• UTHCP – upper tubing hanger crown plug
• UTM –
  universal transverse mercator
• UWI – unique well identifier
• UWILD – underwater inspection in lieu of dry-docking
• UZV – shutdown valve

V

• VBR – variable bore ram
• VCCS – vertical clamp connection system
• VDENL – variation density log
• VDL – variable density log
• VDU – vacuum distillation unit, used in processing bitumen^{[citation needed]}
• VELL – velocity log
• VERAN – verticality analysis
• VERIF – verification list
• VERLI – verification listing
• VERTK – vertical thickness
• VFC – volt-free contact
• VGMS – vent gas monitoring system (flexible riser annulus vent system^{[citation needed]})
• VIR – value-investment ratio
• VISME – viscosity measurement
• VIV – vortex-induced vibration
• VLP – vertical lift performance
• VLS – vertical lay system
• VLTCS – very-low-temperature carbon steel
• VO – variation order
• VOCs – volatile organic compounds
• VOR – variation order request
• VPR – vertical pipe racker
• VRS – vapor recovery system
• VRR – voidage replacement ratio
• VS – vertical section
• VSD – variable-speed drive
• VSI – versatile seismic imager (Schlumberger VSP tool)^[32]
• VSP – vertical seismic profile
• VSPRO – vertical seismic profile
• VTDLL – vertical thickness dual laterolog
• VTFDC – vertical thickness FDC CNL log
• VTISF – vertical thickness ISF log
• VWL – velocity well log
• VXT – vertical christmas tree

W

• W – watt
• WABAN – well abandonment report
• WAC – weak acid cation
• WAG – water alternating gas (describes an injection well which alternates between water and gas injection^{[citation needed]})
• WALKS – walkaway seismic profile
• WAS – well access system
• WATAN – water analysis
• WAV3 – amplitude (in seismics)
• WAV4 – two-way travel time (in seismics)
• WAV5 – compensate amplitudes
• WAVF – waveform log
• WBCO – wellbore clean-out
• WBE – well barrier element
• WBM – water-based drilling mud
• WBS – well bore schematic
• WBS – work breakdown structure
• WC – watercut
• WC – wildcat (well)
• W/C – water cushion
• WCC – work control certificate
• WCT – wet christmas tree
• WE – well engineer
• WEG –
  wireline entry guide
• WELDA – well data report
• WELP – well log plot
• WEQL – well equipment layout
• WESTR – well status record
• WESUR – well summary report
• WF – water flood(ing)
• WFAC – waveform acoustic log
• WGEO – well geophone report
• WGFM – wet gas flow meter
• WGR – water gas ratio
• WGUNT – water gun test
• Wh – white
• WH – well history
• WHIG – whitehouse gauge
• WHM – wellhead maintenance
• WHP – wellhead pressure
• WHRU – waste heat recovery unit
• WHSIP – wellhead shut-in pressure
• WI – water injection
• WI – working interest
• WI – work instructions
• WIKA – definition needed
• WIMS – well integrity management system
• WIR – water intake risers
• WIT – water investigation tool
• WITS – Wellsite Information Transfer Specification
• WITSML – wellsite information transfer standard markup language
• WIPSP – WIP stock packer
• WLC – wireline composite log
• WLL –
  wireline logging
• WLSUM – well summary
• WLTS –well log tracking system
• WLTS – well log transaction system
• WM – wet mate
• WHM – wellhead maintenance
• WHMIS – workplace hazardous material information systems
• WHP – wellhead pressure
• WLM – Wireline Measurement
• WO – well in work over
• WO/O – waiting on orders
• WOA – well operations authorization
• WOB – weight on bit
• WOC – wait on cement
• WOC – water/oil contact (or oil/water contact)
• WOE – well operations engineer (a key person of well services^{[citation needed]})
• WOM – wait/waiting on material
• WOR – water-oil ratio
• WORKO – workover
• WOS – west of
  UKCS
• WOW – wait/waiting on weather
• WP – well proposal or working pressure
• WPC – water pollution control
• WPLAN – well course plan
• WPQ/S/T – weld procedure qualification/specification/test
• WPP – wellhead protection platform
• WPR – well prognosis report
• WQ – a textural parameter used for CBVWE computations (Halliburton^{[citation needed]})
• WQCA – Water Quality Control Act
• WQCB – Water Quality Control Board
• WR – wireline retrievable (as in a WR plug)
• WR – wet resistivity
• WRS – well report sepia
• WRSCSSV – wireline-retrievable surface-controlled sub-surface valve
• WSCL – well site core log
• WSE – well seismic edit
• WSERE – well seismic edit report
• WSG – wellsite geologist
• WSHT – well shoot
• WSL – well site log
• WSO – water shut-off
• WSOG – well-specific operation guidelines
• WSP – well seismic profile
• WSR – well shoot report
• WSS – well services supervisor (leader of well services at the wellsite^{[citation needed]})
• WSS – working spreadsheet (for logging^{[citation needed]})
• WSSAM – well site sample
• WSSOF – WSS offset profile^{[clarification needed]}
• WSSUR – well seismic survey plot
• WSSVP – WSS VSP raw shots
• WSSVS – WSS VSP stacks
• WST – well seismic tool (checkshot^{[citation needed]})
• WSTL – well site test log
• WSU – well service unit
• wt – wall thickness
• WT – well test
• WTI – West Texas Intermediate benchmark crude
• WTR – water
• WUT – water up to
• WV – wing valve (from a christmas tree^{[citation needed]})
• WVS – well velocity survey
• WWS – wire-wrapped (sand) screens

X

• XC – cross-connection, cross correlation
• XL or EXL – exploration licence (United Kingdom), a type of onshore licence issued between the First Onshore Licensing Round (1986) and the sixth (1992)^{[citation needed]}
• Xln – crystalline (minerals)
• XLPE -cross-linked polyethylene
• XMAC – cross-multipole array acoustic log
• XMAC-E – XMAC elite (next generation of XMAC^{[citation needed]})
• XMRI – extended-range micro-imager (Halliburton)
• XMT/XT/HXT – christmas tree
• XO – cross-over
• XOM – Exxon Mobil
• XOV – cross-over valve
• XPERM – matrix permeability in the x-direction^{[clarification needed]}
• XPHLOC – crossplot selection for XPHI^{[clarification needed]}
• XPOR – crossplot porosity
• XPT – formation pressure test log (Schlumberger)
• XV – on/off valve (process control^{[citation needed]})
• XYC – XY caliper log (Halliburton^{[citation needed]})

Y

• yd – yard
• yl – holdup factor
• YP – yield point
• yr – year

Z

• Z – depth, in the geosciences referring to the depth dimension in any x, y, z data
• ZDENP – density log
• ZDL – compensated Z-densilog
• ZLD – zero liquid discharge
• ZOI – zone of influence

See also

• Oilfield terminology

References

External links

• Network International Glossary Archived 15 May 2009 at the Wayback Machine July-11
• Oil Field Acronyms and Abbreviations July-11
• Oil Gas Technical Terms Glossary July-11
• Schlumberger Oilfield Glossary July-11
• Oil Drum Acronyms July-11
• Oiltrashgear Oilfield Acronyms & Terminology November-15
• OCIMF Acronyms Oct-11
• SPWLA Petrophysical Curve Names and Mnemonics Oct-11
• American Royalty Council Glossary Nov-11
• Technip Glossary Archived 24 April 2013 at the Wayback Machine Apr-13