List of acronyms in oil and gas exploration and production

This list is incomplete; you can help by expanding it.

The oil and gas industry uses many acronyms and abbreviations.

This list is meant for indicative purposes only and should not be relied upon for anything but general information.

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• 1C - Proved Contingent Resources
• 1P - Proven reserves
• 2C - Proved and probable Contingent Resources
• 2D – two-dimensional (geophysics)
• 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)

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• AAODC – American Association of Oilwell Drilling Contractors (obsolete; superseded by IADC)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)
• ABSA – Alberta Boilers Safety Association
• ACHE – Air-Cooled Heat Exchanger
• ACOU – Acoustic
• ACQU – Acquisition log
• ADEP - Awaiting Development with Exploration Potential, referring to an asset
• ADROC – advanced rock properties report
• ADT – Applied Drilling Technology, ADT log
• AFE – Authorization For Expenditure, a process of submitting a business proposal to investors
• AFP – Active Fire Protection
• AGRU – acid gas removal unit
• AHBDF – along hole (depth) below Derrick floor
• AHD – along hole depth
• AICD - autonomous inflow control device
• AIRG – airgun
• AIRRE – airgun report
• 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 – aertical seismic profile acoustic log calibration report
• ALR – acoustic log report
• aMDEA – activated methyldiethanolamine
• AMS – auxiliary measurement service log; Auxiliary Measurement Sonde (temperature)
• AMSL – above mean sea level
• AMI - area of mutal interest
• AMV – annulus master valve^[3]
• ANACO – analysis of core logs report
• ANARE – analysis report
• AOF – absolute open flow
• AOFP – absolute open-flow potential
• APD – application for permit to drill
• API – American Petroleum Institute: organization which sets unit standards in the oil and gas industry
• APPRE – appraisal report
• APS – active pipe support
• APWD - annular pressure while drilling (tool)
• 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
• ASI – ASI log
• ASME – American Society of Mechanical Engineers
• ASP – array sonic processing report
• ASTM – American Society for Testing and Materials
• ASCSSV – annulus surface controlled sub-surface valve^[3]
• ASV – annular safety valve
• ATD – application to drill
• 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

B

• B or b – prefix denoting a number in billions
• BA - Bottom Assembly (of a riser)
• bbl – barrel
• 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)
• BDF – below Derrick floor
• BDL – bit data log
• 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
• BHCA – BHC acoustic log
• BHCS – BHC sonic log
• BHCT – bottomhole circulating temperature
• 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
• BIVDL – BI/DK/WF/Casing collar locator/gamma ray log
• BLI – bottom of logging interval
• BO – back-off log
• boe – barrel(s) of oil equivalent
• boed – barrel(s) of oil equivalent per day
• BOEM - Bureau Ocean Energy Management
• boepd – barrel(s) of oil equivalent per day
• BOB – back on bottom
• BOD - Biological Oxygen Demand
• BOM – Bill of materials
• BOP – Blowout preventer
• BOP – bottom of pipe
• bopd – barrel(s) of oil per day
• BOPE - Blow out 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
• bpd – barrels per day
• BPH – barrels per hour
• BPFL – borehole profile log
• BPLUG – baker plug
• 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
• BSEE – US: Bureau of Safety and Environmental Enforcement (Formerly the MMS)
• BSR – blind shear rams (blowout preventer)
• BSML – below sea mean level
• BS&W – basic sediments and water
• 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)
• 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
• CALI – calliper log
• CALOG – circumferential acoustic log
• CALVE – calibrated velocity log data
• CAPP – Canadian Association of Petroleum Producers
• CART – cam-actuated running tool (housing running tool)
• CART – Cap Replacement Tool
• CAS – casing log
• CAT - Connector Actuating Tool
• CB – core barrel
• 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)
• 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
• CE – CE log
• CERE – cement remedial log
• CECAN – CEC analysis
• CEME – cement evaluation
• CET – cement evaluation tool
• CF – completion fluid
• CFD – computational fluid dynamics
• CGEL – CG EL log
• CGL – core gamma log
• 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
• 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)
• CHROM – chromatolog
• CHRT – casing hanger running tool
• CIBP – cast iron bridge plug
• CIDL - chemical injection downhole lower
• CIDU - chemical injection downhole upper
• CIL - chemical injection line
• CILD – conduction log
• CIMV – chemical injection metering valve
• CITHP – closed-in tubing head pressure (tubing head pressure when the well is shut in)
• CIV – chemical injection valve
• CL – core log
• CLG – core log and graph
• CM – choke module
• CMC – crown mounted compensators
• CMP – common midpoint (geophysics)
• CMR – Combinable Magnetic Resonance (NMR log tool)
• 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
• CNS – Central North Sea
• CNCF – field-normalised compensated neutron porosity
• 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
• CONDE – condensate analysis report
• CONDR – continuous directional log
• CORAN – core analysis report
• CORE – core report
• CORG – corgun log
• CORIB – coriband log
• CORLG – correlation log
• COROR – core orientation report
• COXY – carbon/oxygen log
• CP - Cathodic Protection
• CPI separator – corrugated plate interceptor
• CPI – CPI log (computer-processed interpretation)
• CPICB – CPI coriband log
• CPIRE – CPI report
• CRA – corrosion-resistant alloy
• CRET – cement retainer setting log
• CRP – control riser platform
• CRP – common/central reference point (subsea survey)
• CRT – Clamp Replacement tool
• CRT - Casing Running Tool
• CsF – Caesium formate (coincidentally also an acronym of the sole large-scale supplier of caesium formate brine, cabot specialty fluids.)
• 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
• CSPG – Canadian Society of Petroleum Geologists
• CSR - Corporate Social Responsibility
• CST – Chronological Sample Taker log (Schlumberger)
• CSTAK – core sample taken log
• CSTRE – CST report
• CSU - Commissioning and Start Up
• CSUG – Canadian Society for Unconventional Gas
• CT – coiled tubing
• CTD – coiled tubing drilling
• CTCO – coiled tubing clean-out
• CTLF – coil tubing lift frame
• CTLF – compensated tension lift frame
• CTOD – crack tip opening displacement
• CTRAC – cement tracer log
• CUT – cutter log
• CUTTD – cuttings description report
• CWOP – complete well on paper
• CWOR – completion work over riser
• CYBD – cyberbond log
• CYBLK – cyberlook log
• CYDIP – cyberdip log
• CYDN – cyberdon log
• CYPRO – cyberproducts log

D

• D - Development
• D&C – drilling and completions
• D&I - direction and inclinitation (MWD borehole deviation survey)
• DAC – dipole acoustic log
• DARCI – Darci log
• DAT – wellhead housing drill-ahead tool
• DAZD – dip and azimuth display
• DBB – double block and bleed
• DC – drill centre
• DC – drill collar(s)
• DCAL – dual caliper log
• DCS – Distributed Control System
• DD – directional driller or directional drilling
• DDBHC – DDBHC waveform log
• DDET – depth determination log
• DDM – Derrick drilling machine (a.k.a. top drive)
• DDNL – dual det. neutron life log
• DDPT – drill data plot log
• DECC – Department for Energy and Climate Change (UK)
• DECT – decay time
• DEFSU – definitive survey report
• DELTA – delta-T log
• 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
• DFR – drilling factual report
• DGP – dynamic geohistory plot (3D technique)^[4]
• DH – drilling history
• DHC – depositional history curve
• DHSV – downhole safety valve
• DHPTT – downhole pressure/temperature transducer
• DIBHC – DIS BHC log
• 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 – downhole logging
• DOA – delegation of authority
• DOE – Department of Energy, United States
• 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
• DRLCT – drilling chart
• DRLOG – drilling log
• DRLPR – drilling proposal/progress report
• DRPG – drilling program report
• DRPRS – drilling pressure
• DRREP – drilling report
• DRYRE – drying report
• DS – Deviation survey, (also directional system)
• 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 – Department of Trade and Industry (UK) (obsolete; superseded by dBERR, which was then superseded by DECC)
• DTPB – CNT true vertical-depth playback log
• DTT – depth to time
• 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
• EA - Exploration Asset
• EAGE – European Association of Geoscientists & Engineers^[5]
• ECD – Equivalent Circulating Density
• ECP – External Casing Packer
• ECRD – Electrically Controlled Release Device (for abandoning stuck wireline tool from cable)
• ECT - External Cantilevered Turret
• EDP – Exploration Drilling Program Report
• EDP – Emergency Disconnect Package
• EDR – Exploration Drilling Report
• EDR - Electronic Drilling Recorder
• EDS – Emergency Disconnection Sequence
• EFL – Electrical Flying Lead
• EFR – Engineering Factual Report
• EHT – Electric Heat Trace
• EGMBE – Ethylene Glycol Mono-Butyl Ether
• EHU - Electro-Hydraulic Unit
• EIA - Environmental Impact Assessment
• ELT – Economic Limit Test
• EL – Electric Log
• EM – EMOP Log
• EMOP – EMOP Well Site Processing Log
• EMP – Electromagnetic Propagation Log
• EMG – Equivalent Mud Gradient
• EMW – Equivalent Mud Weight
• EMS - Environment measurement sonde (wireline multi-caliper)
• 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)^[6]
• ENJ – Enerjet Log
• EOFL – End of Field Life
• EOR – Enhanced Oil Recovery
• EOT – End of Tubing
• EOW – End Of Well Report
• EPCM - Engineering Procurement Construction Management
• EPCU – Electrical Power Conditioning Unit
• EPIDORIS – Exploration and Production Integrated Drilling Operations and Reservoir Information System
• EPL – EPL Log
• EPLG – Epilog
• EPLPC – EPL-PCD-SGR Log
• 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 Shut-Down
• 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
• 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)
• EZSV – EZSV Log

F

• FAC – factual report
• FAC - first aid case
• FACHV – four-arm calliper log
• FANAL – formation analysis sheet log
• FAT – factory acceptance testing
• FBE – fusion-bonded epoxy
• FC – float collar
• FCP – final circulating pressure
• FCV - Flow Control Valve
• FCVE – F-curve log
• FDC – formation density log
• FDP – field development plan
• FDS – functional design specification
• FEED – front-end engineering design
• FER – field equipment room
• FEWD – formation evaluation while drilling
• FFAC – formation factor log
• FFM – full field model
• FGEOL – final geological report
• FH – full-hole tool joint
• FI – final inspection
• FID – final investment decision
• FID - flame ionisation detection
• FIL – FIL log
• 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
• FIV – flow-induced vibration
• FIV – formation isolation valve
• FL – F log
• FLAP - fluid level above pump
• FLDF - Flying Lead Deployment Frame
• FLIV – flowline injection valve
• FLIV – flowline isolation valve
• FLNG - Floating liquefied natural gas
• FLOG – FLOG PHIX RHGX Log
• 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)
• FMEA – failure modes, & effects analysis
• FMECA – failure modes, effects, and criticality analysis
• FMI – formation micro imaging log (azimuthal microresistivity)
• FMP – formation microscan report
• FMS – formation multi-scan log; formation micro-scan log
• FMTAN – FMT analysis report
• FOBOT - Fibre Optic Break Out Tray
• FOET – Further Offshore Emergency Training
• FOF - Face of Flange
• FOSV – full-opening safety valve
• FPDM – fracture potential and domain modelling/mapping^[7][8]
• FPIT – free-point indicator tool
• FPL – flow analysis log
• FPLAN – field plan log
• 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
• FSO – floating storage offloading vessel
• FT – formation tester log
• FTM – fire-team member
• FTP – first tranche petroleum
• FTRE – formation testing report
• FULDI – full diameter study report
• FV – funnel viscosity or float valve
• FWHP – flowing well-head pressure
• FWKO – free water knock-out
• FWL – free water level
• FWR – final well report
• FWV – flow wing valve (also known as production wing valve on a xmas tree)

G

• G/C – Gas Condensate
• GAS – Gas Log
• GASAN – Gas Analysis Report
• GBS – Gravity Based Structure
• GBT – Gravity Base Tank
• GCLOG – Graphic Core Log
• GCT – GCT Log
• 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])
• GEOCH – Geochemical Evaluation
• GEODY – GEO DYS Log
• GEOEV – Geochemical Evaluation Report
• GEOFO – Geological & 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
• GIS – Geographic Information System
• GL – Gas Lift
• GL – Ground Level
• GLE – Ground Level Elevation (generally in metres above mean sea level)
• GLM – Gas Lift Mandrel (alternative name for Side Pocket Mandrel)
• GLR – Gas Liquid Ratio
• GLT – GLT Log
• GLV – Gas Lift Valve
• GLW –
• 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)
• GPLT – Geol Plot Log
• GPTG - Gallons Per Thousand Gallons
• GPM- Gallons Per Mcf
• GPSL – Geo Pressure Log
• GR – Ground Level (or Elevation //(also [GE or GRE])) or Gamma Ray
• GRAD – Gradiometer Log
• GRE – Ground Elevation (also [GR or GE])
• 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
• GTL – Gas To Liquid
• GTW – Gas To Wire
• GUN – Gun Set Log
• GWC – Gas-Water Contact
• GWREP – Geo Well Report

H

• HAZ – Heat Affected Zone
• HAZID – Hazard Identification (meeting)
• HAZOP – Hazardous Operation
• HC – Hydrocarbons
• HCAL – HRCC Calliper (in Logs)(in Inches)
• HCCS – Horizontal Clamp Connection System
• HCM – Horizontal Connection Module. To connect the Xmas Tree to the Manifold
• HDA – Helideck Assistant
• 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 (Specific-)Gravity Solids
• HHP – Hydraulic Horsepower
• HI - Hydrogen Index
• HIPPS – High Integrity Pressure Protection System
• HIRA - Hazard Identification and Risk Assessment
• HISC – Hydrogen induced stress cracking
• HL – Hook Load
• HLO – Heavy Load-out (Facility)
• HLO – Helicopter Landing Officer
• Hmax – Maximum Wave Height
• HNGS - flasked Hostile Natural Gamma-ray Spectrometry tool
• HP – Hydrostatic Pressure
• HPGAG – High Pressure Gauge
• HPHT – High Pressure High Temperature (same as HTHP)
• HPPS – HP Pressure Log
• HPU – Hydraulic Power Unit
• HPWBM – High Performance Water Base Mud
• HRCC – HCAl of Calliper (in Inches)
• HRLA - High Resolution Laterolog Array (resistivity logging tool)
• Hs – Significant Wave Height
• HSE – Health, Safety and Environment or Health & Safety Executive (United Kingdom)
• HTHP – High Temperature High Pressure (same as HPHT)
• HTM – Helideck Team Member
• HVDC – High Voltage Direct Current
• HWDP – Heavy-Weight Drill Pipe (sometimes spelled Hevi-Wate)
• HUD – Hold Up Depth
• HUET - Helicopter Underwater Escape Training
• 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
• ICoTA – Intervention and Coiled Tubing Association
• ICD – Inflow Control Device
• ICP – Intermediate Casing Point
• ICSS - Integrated Controls and Safety System
• ICSU – Integrated Commissioning and Start Up
• ICV – Interval Control Valve
• ICV – Integrated Cement Volume (of Borehole)(in Cubic Metres)
• ID – Inner or Internal Diameter (of a tubular component such as a casing)
• IDC – Intangible Drilling Costs
• IDEL – IDEL Log
• IEB – Induction Electro BHC Log
• IEL – Induction Electrical Log
• IF – Internal Flush tool joint
• IH – Gamma Ray Log
• IHV – Integrated Hole Volume (of Borehole) (in Cubic Metres)
• IJL – Injection Log
• IL – Induction Log
• ILI – InLine Inspection (Intelligent Pigging)
• ILOGS – Image Logs
• ILT - In-Line Tee
• IMAG – Image Analysis Report
• IMCA – International Marine Contractors Association
• IMR - Inspection Maintenance and Repair
• INCR – Incline Report
• INCRE – Incline Report
• INDRS – IND RES Sonic Log
• INDT – INDT Log
• INDWE – Individual Well Record Report
• INJEC – Injection Falloff Log
• INSUR – Inrun Survey Report
• INVES – Investigative Program Report
• IOC – International Oil Company
• IOM - Installation, Operation and Maintenance Manual
• IPAA – Independent Petroleum Association of America
• IPC – Installed Production Capacity
• IPLS – IPLS Log
• IPR – Inflow Performance Relationship
• IPT - Internal Passive Turret
• IR – Interpretation Report
• IRC – Inspection Release Certificate
• IRTJ – IRTJ Gamma Ray Slimhole Log
• ISF – ISF Sonic Log
• ISFBG – ISF BHC GR Log
• ISFCD – ISF Conductivity Log
• ISFGR – ISF GR Casing Collar Locator Log
• ISFL – ISF-LSS Log
• ISFP – ISF Sonic True Vertical Depth Playback Log
• ISFPB – ISF True Vertical Depth Playback Log
• ISFSL – ISF SLS MSFL Log
• ISIP - Initial Shut In Pressure
• ITD - Internal Turret Disconnectable
• ITR - Inspection Test Record
• ITS – Influx To Surface
• IUG - Instrument Utility Gas
• IWCF – International Well Control Federation
• IWOCS – Installation / Workover Control System

J

• J&A – Junked and Abandoned
• JB – Junk Basket
• JIB - Joint Interest Billing
• JLT - J-Lay Tower
• JT – Joule-Thomson (effect/valve/separator)
• JU – Jack-Up drilling rig
• JV - Joint Venture
• JVP – Joint Venture Partners/Participants

K

• KBE – Kelly Bushing Elevation (in meters above sea level, or meters above Ground Level)
• KCI - Potassium Chloride (KCI) mud
• KD – Kelly Down
• KMW - Kill Mud Weight
• KOP – Kick-Off Point Directional Drilling
• KOP – Kick Off Plug
• KRP – Kill Rate Pressure
• KB – Kelly Bushing
• KBG – Kelly Bushing Height above Ground Level
• KT - Kill Truck

L

• LACT – Lease Automatic Custody Transfer
• LAH – Lookahead
• LAOT – Linear Activation Override Tool
• LARS – Launch & Recovery System
• LAS - Log ASCII Standard
• LAT – Lowest Astronomical Tide
• LCM – Lost Circulation Material
• LCNLG – LDT CNL Gamma Ray Log
• LD – Lay Down (tubing, rods, etc.)
• 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
• LGO – Light Gas Oil
• LGR – Liquid Gas Ratio
• LGS – Low (specific-)Gravity Solids
• LIC – License
• LINCO – Liner and Completion Progress Report
• LIOG – Lithography Log
• LIT – Lead Impression Tool
• 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
• LMV – Lower Master Valve (on a Xmas tree)
• LNG – Liquefied Natural Gas
• LOA – Letter of Authorisation/Agreement/Authority
• LOE – Lease Operating Expenses
• LOGGN – Logging Whilst Drilling
• LOGRS – Log Restoration Report
• LOGSM – Log Sample
• LOLER – Lifting Operations and Lifting Equipment Regulations
• 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
• LRP – Lower Riser Package
• LSD – Land Surface Datum
• LSBGR – Long Spacing BHC GR Log
• LSSON – Long Spacing Sonic Log
• LT – Linear Time or Lag Time
• LTC - Long Thread and Coupled
• LT&C - Long Thread and Coupled
• LTI(FR) – Lost Time Incident (Frequency Rate)
• LUMI – Luminescence Log
• 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 mega- or m for milli)
• m – metre
• MAASP – Maximum Acceptable [or Allowable] Annular Surface Pressure
• MAC – Multipole Acoustic Log
• MACL – Multiarm Caliper Log
• MAGST – Magnetostratigraphic Report
• MAOP – Maximum Allowable Operating Pressure
• MARA – Maralog
• MAST - sonic tool (records waveform).
• MAWP – Maximum Allowable Working Pressure
• Mbd – thousand barrels (of oil) per day
• Mbod – thousand barrels of oil per day
• Mboe – thousand barrels of oil equivalent
• Mboed – thousand barrels of oil equivalent per day
• Mbpd – thousand barrels of oil per day
• MBR - Minimum Bend Radius
• MBRO – Multi-Bore Restriction Orifices
• MBT – Methylene Blue Test
• MBWH - Multi Bowl Wellhead
• 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 & Connection System
• MCS – Master Control Station
• mD – millidarcy, measure of permeability, with units of area
• MD – Measured Depth (see also MDSS)
• 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 Sub-Sea
• MDT – Modular formation Dynamic Tester
• MEA – Monoethanolamine
• MEG – Mono-Ethylene Glycol
• MEIC - Mechanical Electrical Instrumentation Commission
• MEPRL – Mechanical Properties Log
• MERCR – Mercury Injection Study Report
• MERG – Merge FDC/CNL/Gamma Ray/Dual Laterolog/Micro SFL Log
• MEST – Micro-electrical scanning tool (a dipmeter, aka. MST or FMS).^[9]
• MF – Marsh Funnel (mud viscosity)
• MFCT – Multifinger Calliper Tool
• MGL – Magnelog
• MLH – Mud Liner Hanger
• MIFR – Mini Frac Log
• MINL – Minilog
• MIPAL – Micropalaeo Log
• MIRU – Move In and Rig Up
• MIST – Minimum Industry Safety Training
• MIYP – Maximum Internal Yield Pressure
• mKB – Meters below Kelly Bushing
• ML – Microlog, or Mud Log
• MLL – Microlaterolog
• MLF – Marine Loading Facility
• MM or mm – prefix designating a number in millions (or SI unit – millimetre)
• MMbd – million barrels per day
• 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)
• 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
• MOF – Marine Offloading Facility
• MOPU – Mobile Offshore Production Unit
• MOT – Materials/Marine Offloading Terminal
• 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
• MPV – Multi Purpose Vessel
• MQC – Multi Quick Connection Plate
• MR – Marine Riser
• MR - Morning Report
• MRBP - Magna Range Bridge Plug
• MRCV – Multi Reverse Circulating Valve
• MRIRE – Magnetic Resonance Image Report
• MRR - Material Receipt Report
• MRX - Magnetic resonance expert (wireline NMR tool)
• MSCT – Mechanical Sidewall Coring Tool
• 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)
• MSIPC – Multi Stage inflatable Packer Collar
• MSL – Mean Sea Level
• MSL – Micro Spherical Log
• MSS – Magnetic Single Shot
• MST – MST EXP Resistivity Log
• MTBF - Mean Time Between Failure
• MT - Motor Temperature; DMT Parameter for ESP motor
• MTO - Material Take-Off
• MTT – MTT Multi-Isotope Trace Tool
• MUD – Mud Log
• MUDT – Mud Temperature Log
• MuSol – Mutual Solvent
• MVB – Master Valve Block on Xmas Tree
• MW – Mud weight
• MWD – Measurement While Drilling
• MWDRE – Measurement While Drilling Report
• MWS – Marine Warranty Survey

N

• NACE – National Association of Corrosion Engineers
• NAPF – Non Aqueous Phase Fluid
• NASA – Non Active Side Arm (term used in the North Sea for kill wing valve on a Xmas tree)
• NAVIG – Navigational Log
• NB – Nominal Bore
• ND - Nipple Down
• NDE – Non Destructive Examination
• NEFE - Non Emulsifying Iron Inhibitor (usually used with hydrochloric acid)
• NEUT – Neutron Log
• NFG – 'No Fucking Good' used for marking damaged equipment, not to be confused with NG being natural gas
• 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
• NGSS – NGS Spectro Log
• NGT – Natural Gamma Ray Tool
• NGTLD – NGT LDT QL Log
• NGLQT – NGT QL Log
• NGTR – NGT Ratio Log
• NHDA – National Hydrocarbons Data Archive (United Kingdom)
• NHPV – Net Hydrocarbon Pore Volume
• NMDC - Non Magnetic Drill Collar
• NMHC – Non-Methane Hydrocarbons
• NMR – Nuclear Magnetic Resonance Log
• NMVOC – Non-Methane Volatile Organic Compounds
• NNS – Northern North Sea
• NOISL – Noise Log
• NOC – National Oil Company
• NORM – Naturally Occurring Radioactive Material
• NP – Non Producing well (as opposed to P – Producing well)
• NPD – Norwegian Petroleum Directorate
• NPS – Nominal Pipe Size (sometimes NS)
• NPSH – Net Positive Suction Head
• NPV – Net Present Value
• NRI - Net Revenue Interest
• NRV – Non Return Valve
• NPW – New Pool Wildcat, Lahee classification
• NS – North Sea; can also refer to the North Slope Borough, Alaska, the North Slope, which includes Prudhoe Bay Oil Field (the largest US oil field), Kuparuk Oil Field, Milne Point, Lisburne, and Point McIntyre among others.
• NTHF – Non-Toxic High Flash
• NTU – Nephelometric Turbidity Unit
• NUMAR – Magnetic Resonance Image Log

O

• O&G – Oil and Gas
• O&M – Operations and Maintenance
• OBCS – Ocean Bottom Cable System
• OBDTL – OBDT Log
• OBEVA – OBDT Evaluation Report
• OBM – Oil-Based Mud
• OCIMF – Oil Companies International Marine Forum
• OCI - Oil Corrosion Inhibitor (Vessels)
• OCL – Quality Control Log
• OCTG – Oil Country Tubular Goods (oil well casing, tubing, and drill pipe)^[10]
• OD – Outer Diameter (of a tubular component such as casing)
• ODT – Oil Down To
• OFST – Offset Vertical Seismic Profile
• OEM – Original Equipment Manufacturer
• OH – Openhole
• OH – Openhole Log
• OHC – Open Hole Completion
• OI - Oxygen Index
• OIM – Offshore Installation Manager
• 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)
• OOIP – Original Oil In Place
• OOT – Out of Tolerance
• 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
• ORRI - Overriding Royalty Interest
• OS&D - Over, Short & Damage (Report)
• OT – A Well On Test
• OTDR – Optical Time Domain Reflectometry
• OTIP – Operational Testing Implementation Plan
• OTL – Operations Team Leader
• OTSG - One-time Through Steam Generator
• OWC – Oil Water Contact
• OT – Off Tree
• OUT – Outpost, Lahee classification
• OUT – Oil Up To
• OVCH – Oversize Charts
• OVID – Offshore Vessel Inspection Database
• OWC – Oil-Water Contact

P

• P – Producing well (as opposed to NP – Non Producing)
• P&A – plugged and abandoned (of a well)
• PA - Producing Asset
• PA - Polyamide
• PADPRT – Pressure Assisted Drillpipe Running Tool
• PA - Producing Asset with Exploration Potential
• PAL – Palaeo Chart
• PALYN – Palynological Analysis Report
• PAR – Pre-Assembled Rack
• PAGA – Public Address General Alarm
• PAU – Pre-Assembled Unit
• PBDMS – Playback DMSLS Log
• 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)
• PCA - Production Concession Agreement
• PCB – Poly Chlorinated BiPhenyl
• PCCL – Perforation Casing Collar Locator Log
• PCDC - Pressure Cased Directional (Geometry i.e. borehole survey) MWD tool
• PCDM – Power and Control Distribution Module
• PCKR – Packer
• PCMS - Polymer Coupon Monitoring System
• PCOLL – Perforation and Collar
• PCPT - Piezo-Cone Penetration Test
• PDC – Perforation Depth Control
• PDC – Polycrystalline Diamond Compact (a type of drilling bit)
• PDG/PDHG – Permanent Downhole Gauge
• PDKL – PDK Log
• PDKR – PDK 100 Report
• PDM - Positive Displacement Motor
• PDP – Proved Developed Reserves
• PDPM – Power Distribution Protection Module
• PDNP – Proved Developed Not Producing
• PE - Product Emulsion
• PE – Petroleum Engineer
• PE – Professional Engineer
• PE - Polyethylene
• PEA – Palaeo Environment Study Report
• PEDL – Petroleum Exploration and Development Licence (United Kingdom), introduced in the 8th Onshore Licensing Round
• PENL – Penetration Log
• PEP – PEP Log
• 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)
• PFE – Plate/Frame Heat Exchanger
• PFHE – Plate Fin Heat Exchanger
• PFC – PFC Log
• PFPG – Perforation Plug Log
• PFREC – Perforation Record Log
• PG – Pressure Gauge (Report)
• PGB – Permanent Guide Base
• PGOR – Produced Gas Oil Ratio
• 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 (mud)
• PHYFM – Physical Formation Log
• PI – Productivity Index or (Permit Issued)
• P&ID - Process and Instruments Diagram
• PINTL – Production Interpretation
• PIP - Pump Intake Pressure
• PIP – Pipe in Pipe
• PIT - Pump Intake Temperature
• PL – Production Licence
• PLEM – Pipeline End Manifold
• PLES -Pipeline End Structure
• PLET – Pipeline End Termination
• PLG – Plug Log
• PLS – Position Location System
• PLSV - Pipelay Support Vessel
• PLT – Production Logging Tool
• PLTQ – Production Logging Tool Quicklook Log
• PLTRE – Production Logging Tool Report
• PMI – Positive Material Identification
• 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
• POOH / POH – Pull Out Of Hole
• PON – Petroleum Operations Notice (United Kingdom)

*POP - Pump Out Plug

• POR – Density Porosity Log
• POSFR – Post Fracture Report
• POSTW – Post Well Appraisal Report
• POSWE – Post Well Summary Report
• PP – DXC Pressure Plot Log
• PP – Pump Pressure
• ppb - Pounds Per Barrel
• PPC - Powered Positioning Caliper (Schlumberger dual-axis wireline caliper tool)
• ppcf – Pounds Per Cubic Foot
• 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
• pptf – Pounds (per square inch) Per Thousand Feet (of depth) – a unit of fluid density/pressure
• PPS – Production Packer Setting
• PQR - Procedure Qualification Record
• PR2 – Testing regime to API6A Annex F
• PRA – Production Reporting & Allocation
• PREC – Perforation Record
• PRESS – Pressure Report
• 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 Shut-Down
• PSIA – Pounds Per Square Inch Atmospheric
• PSIG – Pounds Per Square Inch Gauge
• PSL – Product Specification Level
• PSLOG – Pressure Log
• PSP – Pseudostatic Spontaneous Potential
• PSPL – PSP Leak Detection Log
• PSQ – Plug Squeeze Log
• PST – PST Log
• PSV – Pipe Supply Vessel
• PSV – Pressure Safety Valve
• PSVAL – Pressure Evaluation Log
• PTA/S – Pipeline Termination Assembly/Structure
• PTO - Permit to Operate
• 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
• PUWER – Provision and Use of Work Equipment Regulations
• 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. (See also Annular- APWD.)
• PWB – Production Wing Block (XT)
• PWHT – Post Weld Heat Treat
• PWRI – Produced Water Re-Injection
• PWV – Production Wing Valve (also known as a flow wing valve on a Xmas tree)

Q

• QC – Quality control
• QCR – Quality Control Report
• QL – Quicklook Log

R

• RAC – Ratio Curves
• RACI – Responsible / Accountable / Consulted / Informed
• RAM – Reliability, Availability, and Maintainability
• RAWS – Raw Stacks VSP Log
• RBP – Retrievable Bridge Plug
• RBS - Riser Base Spool
• RKB – Rotary Kelly Bushings
• RCA – Root Cause Analysis
• RCKST – Rig Checkshot
• RCD – Rotating Control Device
• RCI – Reservoir Characterization Instrument (for downhole fluid measurements e.g. spectrometry, density, etc.)
• RCL – Retainer Correlation Log
• RCM – Reliability Centred Maintenance
• RCR – Remote Component Replacement (Tool)
• RCU – Remote Control Unit
• RDMO - Rig Down Move Out
• RE – Reservoir Engineer
• REOR – Reorientation Log
• RE-PE – Re-Perforation Report
• RESAN – Reservoir Analysis
• RESDV - Riser Emergency Shut Down 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
• RFLNG – Ready for Liquefied Natural Gas
• RFMTS – Repeat Formation Tester
• RFSU – Ready For Start-Up
• RFT – Repeat Formation Tester
• RFTRE – Repeat Formation Tester Report
• RFTS – Repeat Formation Tester Sample
• 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)
• 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
• ROCT – Rotary Coring Tool
• ROP – Rate of Penetration
• ROP - Rate of Perforation
• ROT – Remote Operated Tool
• ROV/WROV – Remotely Operated Vehicle/WorkClass Remotely Operated Vehicle, used for subsea construction and maintenance
• ROZ – Recoverable Oil Zone
• ROWS – Remote Operator Workstation
• RPCM – Ring Pair Corrosion Monitoring
• RPM – Revolutions Per Minute, (Rotations Per Minute)
• RRC - Rail Road Commission (governs oil and gas production in Texas)
• RROCK – Routine Rock Properties Report
• RSS – Rig Site Survey
• RSS – Rotary Steerable Systems
• RST – Reservoir Saturation Tool (Schlumberger) Log
• RTMS – Riser Tension Monitoring System
• RTE - Rotary Table Elevation
• RTTS – Retrievable Test-Treat-Squeeze (packer)
• RWD – Reaming While Drilling

S

• SABA – Supplied Air Breathing Apparatus
• 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
• SAT – SAT Log
• SAT – Site Acceptance Test
• SB – SIT-BO Log
• 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
• SCDES – Sidewall Core Description
• scf – standard cubic feet (of natural gas)
• SCHLL – Schlumberger Log also SCHLO, SCHLU
• SCM(MB) – Subsea Control Module (Mounting Base)
• SCO – Synthetic crude oil
• SCRS – Slow Circulation Rates
• SCSSV – Surface Controlled Subsurface Safety Valve
• SCVF-Surface Casing Vent Flow. It's kind of test
• 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
• SDT – Step Draw-down Test (sometimes SDDT)
• 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
• SEM – Subsea Electronics Module
• Semi (or Semi-Sub) – Semi-Submersible Drilling Rig
• SEPAR – Separator Sampling Report
• SEQSU – Sequential Survey
• SFERAE – Global Association for the use of knowledge on Fractured Rock in a state of Stress, in the field of Energy, Culture and Environment^[11]
• SFL – Steel Flying Lead
• SG – Static Gradient
• SGR - Shale Gouge Ratio
• SGSI – Shell Global Solutions International
• SGUN – Squeeze Gun
• SHA – Sensor Harness Assembly
• SHDT – Stratigraphic High Resolution Dipmeter Tool
• SHO – Stab and Hinge Over
• SHOCK – Shock Log
• SHOWL – Show Log
• SI – Shut In well
• SI - Structural Integrity
• SI - Scale Inhibitor
• SI/TA – Shut In/Temporarily Abandoned
• SIA - Social Impact Assessment
• SICP – Shut-In Casing Pressure
• SIDPP – Shut-In Drill Pipe Pressure
• SIDSM – Sidewall Sample
• SIGTTO – Society of International Gas Tanker and Terminal Operators
• SIMCON – Simultaneous Construction
• SIMOPS – Simultaneous Operations
• SIP – Shut In Pressure
• SIPES – Society of Independent Professional Earth Scientists, United States
• SIT – System Integration Test FR SIT – Field Representation SIT
• SIT - (Casing) Shoe Integrity Test
• SITHP – Shut In Tubing Hanger/Head Pressure (another term for CITHP)
• SITT – Single TT Log
• SIWHP – Shut-in Well Head Pressure
• SKPLT – Stick Plot Log
• SL – Seismic Lines
• SLS – SLS GR Log
• SLT – SLT GR Log
• SMA – Small Amount
• SMLS – Seamless PipeMPP:
• SMO – Suction Module
• SMPC- Subsea Multiphase Pump: Pump, which can increase flowrate and pressure of the untreated wellstream
• SN – Seat Nipple
• SNAM – Societá NAzionale Metanodotti now Snam S.p.A. (Italy)^[12]
• SNP – Sidewall Neutron Porosity
• SNS – Southern North Sea
• 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 - Shear Out Plug

• SOW _ Slip-On Wellhead
• SP - Set Point
• SP – Shot point (geophysics)
• SP – Spontaneous Potential (Well Log)
• SPCAN – Special core analysis
• SPCU - Subsea Power and Control Unit
• SPE – Society of Petroleum Engineers^[13]
• SPEAN – Spectral Analysis
• SPEL – Spectralog
• SPFM – Single Phase Flow Meter
• SPH – SPH Log
• SPM – Side Pocket Mandrel or Strokes Per Minute (of a positive-displacement pump)
• SPMT – Self-Propelled Modular Transporter
• SPOP – Spontaneous Potential Log
• SPP – Stand Pipe Pressure
• SPROF – Seismic Profile
• SPS – Subsea Production Systems
• SPT – Shallower Pool Test, Lahee classification
• SPWLA - Society of Petrophysicists and Well Log Analysts^[14]
• SQL – Seismic Quicklook Log
• SR – Shear Rate
• SRD – Seismic Reference Datum, an imaginary horizontal surface at which TWT is assumed to be zero
• SREC – Seismic Record Log
• SRT – Site Receival Test
• SS – Subsea, as in a datum of depth, e.g. TVDSS (True Vertical Depth Subsea)
• 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)
• SSD – Sliding Sleeve Door
• SSG – Sidewall Sample Gun
• 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
• 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
• STFL – Steel Tube Fly Lead
• STGL – Stratigraphic Log
• STIMU – Stimulation Report
• STKPT – Stuck Point
• STL – STL Gamma Ray Log
• STL - Submerged Turret Loading
• STRAT – Stratigraphy, stratigraphic
• STRRE – Stratigraphy Report
• STOIIP – Stock Tank Oil Initially In Place
• STOP – Safety Training Observation Program
• STP - Submerged Turret Production
• STSH – String Shot
• ST&C - Short Thread and Coupled
• STC - Short Thread and Coupled
• STU - Steel Tube Umbilical
• SUML – Summarised Log
• SUMRE – Summary Report
• SUMST – Geological Summary Sheet
• SURF – Subsea/Umbilicals/Risers/Flowlines
• SURFR – Surface Sampling Report
• SURRE – Survey Report
• SURVL – Survey Chart Log
• SUT(A/B) – Subsea Umbilical Termination (Assembly/Box)
• 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
• SV – Sleeve Valve or Standing Valve
• SYNRE – Synthetic Seismic Report
• SYSEI – Synthetic Seismogram Log

T

• T – well flowing to Tank
• TA – Temporarily Abandoned well
• TA – Top Assembly
• TAC – Tubing Anchor
• 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
• TBT – Through Bore Tree
• TCA – Total Corrosion Allowance
• TCF – Temporary Construction Facilities
• TCF – Trillion Cubic Feet(of gas)
• TCI – Tungsten Carbide Insert (a type of rollercone drillbit)
• 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)
• TDD – Total Depth (Driller)
• TDL – Total Depth (Logger)
• TDM – Touch Down Monitoring
• TDP - Touch Down Point
• TDS – Top Drive System
• TDS – Total Dissolved Solids
• TDT – TDT Log
• TDTCP – TDT CPI Log
• TDT GR – TDT Gamma Ray Casing Collar Locator Log
• TEFC – Totally Enclosed Fan Cooled
• TEG – Tri-Ethylene Glycol
• TEG - Thermal Electric Generator
• TELER – Teledrift Report
• TEMP- Temperature Log
• TFE – TotalFinaElf (obsolete; Now Total S.A.) major French multinational oil company^[15]
• TFL – Through Flow Line
• TFM – TaskForceMajella Research Project
• 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)
• TH – Tubing Hanger
• THERM – Thermometer Log
• THP – Tubing Hanger Pressure (pressure in the production tubing as measured at the tubing hanger)
• THRT – Tubing Hanger Running Tool
• TIE – Tie In Log
• TIH – Trip Into Hole
• TIW – Texas Iron Works (pressure valve)
• TIEBK – Tieback Report
• TLI – Top of Logging Interval
• TLOG – Technical Log
• TMCM – Tranverse 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 Content/Carbon
• TOF - Top of Fish
• TOFD – Time of first data sample (on seismic trace)
• TOFS – Time of first surface sample (on seismic trace)
• TOH – Trip Out of Hole
• TOOH – Trip Out Of Hole
• TOL – Top Of Liner
• TORAN – Torque and Drag Analysis
• TPERF – Tool Performance
• TQM – Total Quality Management
• TRCFR – Total Recordable Case Frequency Rate
• TRT – Tree Running Tool
• TR – Temporary Refuge
• TRA – Top Riser Assembly
• TRA – Tracer Log
• TRACL – Tractor Log
• TRD – Total Report Data
• TREAT – Treatment Report
• TREP – Test Report
• TRIP – Trip Condition Log
• 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
• TSI – Temporarily Shut In
• TT – Torque Tool
• TT – Transit Time Log
• TTRD – Through Tubing Rotary Drilling
• TUM – Tracked Umbilical Machine
• TUTB – Topside Umbilical Termination Box
• 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
• TVDSS – True Vertical Depth Sub Sea
• 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
• UCR - Unsafe Condition Report
• UCSU – Upstream Commissioning and Start-Up
• UFJ – Upper Flex Joint
• 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 Xmas tree)
• UPB - Unmanned Production Buoy
• UPR – Upper Pipe Ram
• URT – Universal Running Tool
• USIT - Ultrasonic imaging tool (cement bond logging)
• USGS – United States Geological Survey
• UTA/B – Umbilical Termination Assembly/Box
• UTM – Universal Transverse Mercator
• UWI – Unique Well Identifier
• UWILD – Underwater Inspection in Lieu of Dry Docking

V

• VDENL – Variation Density Log
• VDL – VDL Log (Variable Density Log)
• VDU – Vacuum Distillation Unit, used in processing bitumen
• VELL – Velocity Log
• VERAN – Verticality Analysis
• VERIF – Verification List
• VERLI – Verification Listing
• VERTK – Vertical Thickness
• 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
• VRR – Voidage Replacement Ratio
• VS – Vertical Section
• VSD – Variable Speed Drive
• VSI - Versatile Seismic Imager (Schlumberger VSP tool)^[16]
• 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
• W/C – Water Cushion
• WCC - Work Control Certificate
• WABAN – Well Abandonment Report
• WAC - Weak Acid Cation
• WAG – Water Alternating Gas (describes an injection well which alternates between water and gas injection)
• WALKS – Walkaway Seismic Profile
• WATAN – Water Analysis
• WAV3 – Amplitude (in Seismics)
• WAV4 – Two Way Travel Time (in Seismics)
• WAV5 – Compensate Amplitudes
• WAVF – Waveform Log
• WBM – Water-Based drilling Mud
• WC – Watercut / Wildcat well
• 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 Flooding
• WFAC – Waveform Acoustic Log
• WGEO – Well Geophone Report
• WGR - Water Gas Ratio
• WGFM – Wet Gas Flow Meter
• WGUNT – Water Gun Test
• Wh – White
• WH – Well History
• WHIG – Whitehouse Gauge
• WHM – Wellhead Maintenance
• WHP – Wellhead Pressure
• WHSIP - Wellhead Shut-In Pressure
• WI – Water Injection
• WI – Working Interest
• WIKA - Definition Needed
• WIT- Water Investigation Tool
• WITS – Well Site Information Transfer System
• 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
• 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)
• WOM – Wait(ing) on Material
• WOR – Water-Oil Ratio
• WORKO – Workover
• WOS – West of Shetland, oil province on the UKCS
• WOW – Wait(ing) On Weather
• WP – Well Proposal or Working Pressure
• WPC – Water Pollution Control
• WPLAN – Well Course Plan
• WPQ/S – Weld Procedure Qualification/Specification
• WPR – Well Prognosis Report
• WQ – A textural parameter used for CBVWE computations (Halliburton)
• 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
• 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)
• WSS – Working Spread Sheet (for logging)
• WSSAM – Well Site Sample
• WSSOF – WSS Offset Profile
• WSSUR – Well Seismic Survey Plot
• WSSVP – WSS VSP Raw Shots
• WSSVS – WSS VSP Stacks
• WST - Well Seismic Tool (checkshot)
• WSTL – Well Site Test Log
• WSU – Well Service Unit
• wt - wall thickness
• WT – Well Test
• WTI – West Texas Intermediate benchmark crude
• WUT – Water Up To
• WVS – Well Velocity Survey

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)
• Xln – Crystalline (minerals)
• XLPE -Cross-linked Polyethylene
• XMAC – Cross-Multipole Array Acoustic log
• XMAC-E – XMAC Elite (Next generation of XMAC)
• XMRI – Extended Range Micro Imager (Halliburton)
• XMT/XT/HXT – XMas Tree (Christmas Tree, the valve assembly on a production well-head)
• XO – Cross-Over
• XOM – Exxon Mobil
• XOV – Cross-Over Valve
• XPERM – Matrix Permeability in the X-Direction
• XPHLOC – Crossplot Selection for XPHI
• XPOR – Crossplot Porosity
• XPT – Formation Pressure Test log (Schlumberger)
• XYC – XY Calliper Log (Halliburton)

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
• ZOI – Zone of Influence

See also

• Oilfield terminology

Petroleum industry Petroleum Primary energy Benchmarks Argus Sour Bonny Light Brent Dubai Indonesian Isthmus-34 Light Japan Cocktail OPEC Reference Basket Tapis Urals Western Canadian Select West Texas Intermediate Data Natural gas Consumption Production Reserves Imports Exports Price Petroleum Consumption Production Reserves Imports Exports Price (of gasoline and diesel) Exploration Core sampling Geophysics Integrated asset modelling Petroleum engineering Reservoir simulation Seismic to simulation Petroleum geology Petrophysics Reflection seismology (Seismic inversion) Seismic source Drilling Blowout Completion (Squeeze job) Differential sticking Directional drilling (Geosteering) Drilling engineering Drilling fluid (invasion) Drill stem test Lost circulation Measurement Tracers Underbalanced drilling Well logging Production Petroleum fiscal regime Concessions Production sharing agreements Artificial lift Pumpjack Submersible pump (ESP) Gas lift Downstream Enhanced oil recovery (EOR) Steam injection Gas reinjection Midstream Petroleum product Pipeline transport Refining Upstream Water injection Well intervention XT History 1967 Oil Embargo 1973 oil crisis 1979 energy crisis 1980s oil glut 2000s energy crisis Founders History of petroleum Nationalization Seven Sisters Standard Oil Oil market timelines Provinces and fields List of natural gas fields List of oil fields East Midlands Oil Province East Texas Gulf of Mexico Niger Delta North Sea Persian Gulf Prudhoe Bay Oil Field Russia Venezuela Western Canadian Sedimentary Basin Other topics Acronyms Peak oil mitigation timing People Petrocurrency Petrodollar Petroeuro Shale gas Swing producer Unconventional oil heavy crude sands shale   Companies and organisations Major petroleum companies Supermajors BP Chevron ConocoPhillips ExxonMobil Royal Dutch Shell Total National oil companies ADNOC (UAE) CNOOC (China) CNPC (China) Gazprom (Russia) Iraq National Oil Company Indian Oil Corporation Kuwait Petroleum Corporation Nigerian National Petroleum Corporation NIOC (Iran) NISOC (Iran) OGDCL (Pakistan) ONGC (India) PDVSA (Venezuela) PKN Orlen (Poland) Pemex (Mexico) Pertamina (Indonesia) Petrobras (Brazil) PetroChina Petronas (Malaysia) Petrovietnam Qatar Petroleum Rosneft (Russia) Saudi Aramco (Saudi Arabia) Sinopec (China) SOCAR (Azerbaijan) Sonangol (Angola) Sonatrach (Algeria) Statoil (Norway) YPF (Argentina) Energy trading Glencore Gunvor Mercuria Naftiran Intertrade Trafigura Vitol Other Anadarko Apache BG Group Cenovus Energy Cepsa Devon Eni Galp Energia Hess Husky Energy Imperial Oil Lukoil Marathon Oil Nippon Oil Occidental OMV Port Harcourt Refining Company Reliance Industries Repsol Suncor Energy Surgutneftegas TNK-BP Tullow Oil Tüpraş Major services companies AMEC Baker Hughes Cameron CGG CH2M HILL Chicago Bridge & Iron Company China Oilfield Services Enbridge Ensco GE Oil & Gas Halliburton Naftiran Intertrade National Oilwell Varco Petrofac Saipem Schlumberger Snam Technip TransCanada Transocean Weatherford Wood Group Other International Association of Oil & Gas Producers International Energy Agency International Petroleum Exchange OPEC Society of Petroleum Engineers World Petroleum Council Category  Commons

References

External links

• Network International Glossary 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
• Drillingahead Oilfield Acronyms & Terminology Sept-11
• OCIMF Acronyms Oct-11
• SPWLA Petrophysical Curve Names and Mnemonics Oct-11
• American Royalty Council Glossary Nov-11
• Technip Glossary Apr-13