Oilfield Glossary
Oilfield Glossary
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Variables and Numbers

Sor Sw 2D survey 3D survey
a 1D seismic data 2-way traveltime 4C seismic data
m 1-D seismic data 3C seismic data 4D seismic data
n 2D seismic data 3D seismic data 6FF40


a acrylamido-methyl-propane sulfonate polymer amplitude distortion areal sweep efficiency
API Recommended Practice 10B Recommended Practice for Testing Well Cements acrylate polymer amplitude variation with offset arenaceous
API Specification 10A – Specification for Cements and Materials for Well Cementing activation log amplitude variation with offset and azimuth argillaceous
abandonment costs active margin AMPS arithmetic mean
abnormal events active sulfide anaerobic armor
abnormal pressure activity of aqueous solutions analog aromatic content test
abrasion test acyclic compound angle of approach aromatic hydrocarbon
abrasive jetting adapter spool angle of incidence array
absolute age additivity angular unconformity array induction
absolute filter adhesion tension anhydrite array laterolog
absolute open flow potential adjacent bed aniline point test array propagation resistivity
absolute permeability adjustable choke anion array sonic
absolute pressure adjusted flow time anionic arrival
absolute volume adsorbed gas anisotropic arrival time
absorbing boundary conditions adsorption anisotropic formation artificial intelligence
absorption advective transport modeling anisotropy artificial lift
absorption band aeolian annubar as delivered BTU
absorption oil aeolotropy annular blowout preventer as-delivered BTU
abyss aerated layer annular BOP ASME
abyssal aerobic annular flow ASP flooding
accelerator aeromagnetic survey annular gas flow asphalt
accelerator source AFE annular pressure asphaltene onset concentration
accelerometer afterflow annular production asphaltene onset pressure
accommodation AGC annular space asphaltene precipitation
accretion AGC time constant annular velocity asphaltenes
accumulation agglomeration annuli asphaltic crude
accumulator aggradation annulus asphaltic mud additive
accuracy aggradational anode assignment
acetic acid aggregate anomalous asthenosphere
acid aggregation anomaly ASTM
acid effect air cut mud antialias filter atmospheric corrosion
acid frac air drill anticlinal attapulgite
acid gas air drilling anticlinal trap attenuate
acid inhibitor air gun anticline attenuation
acid job air shooting antifoam attenuation resistivity
acid number air wave antifoam agent attitude
acid stimulation air-cut mud antisqueeze attribute
acid tank Alford rotation antithetic fault audio measurement
acid wash alias filter antiwhirl bit aulacogen
acidity aliasing AOF authigenic
acidize alidade AOFP authority for expenditure
acidizing aliphatic compound aperture autochthon
acoustic alkaline API autochthonous
acoustic basement alkaline flooding API 6D: Specification for Pipeline Valves autocorrelation
acoustic coupler alkaline-surfactant-polymer flooding API cement automatic gain control
acoustic emission alkalinity API fluid loss test autotrack
acoustic impedance alkalinity test API fluid-loss test autotracking
acoustic impedance section allochthon API gravity AV
acoustic log allochthonous API unit AVA
acoustic mode allogenic API water AVAZ
acoustic positioning alluvial apparent anisotropy average reservoir pressure
acoustic transducer alluvium apparent dip average velocity
acoustic transparency all-welded construction apparent matrix AVO
acoustic traveltime alpha processing apparent velocity AVOAZ
acoustic velocity altered zone apparent viscosity axial loading
acoustic velocity log alum apparent wavelength axial surface
acoustic wave aluminum activation log applied-potential method axis of rotational symmetry
acquisition aluminum stearate appraisal azimuth
acquisition log ambient temperature aquifer azimuthal
acrylamide acrylate polymer amides Archie equation azimuthal density
acrylamide polymer amines Archie rock azimuthal laterolog
acrylamide-acrylate polymer amplitude area open to flow azimuthal resolution
acrylamido methyl propane sulfonate polymer amplitude anomaly areal displacement efficiency


back flow Bayesian method blasting cap Boyle's Law Double Cell
back in Bayesian probability bleed off Boyle's Law Single Cell
back off BBL or bbl bleedoff line brachistochrone
back pressure Bc blended crude braided line
back pressure valve Bcf blender break
back propagation Bcf/D blind box break circulation
back stripping bead tracer blind ram break out
back up beam blind shear ram breakdown pressure
back up ring beam pump blind zone breaker
back wash bean blind-shear ram breakout
backflow bean choke block breakout cathead
background gas Bearden units of consistency block valve breakout tongs
back-in Beaufort scale blockage breakthrough
backoff bed block-and-bleed bridge
backpressure bed thickness blow down bridge off
back-pressure bed wrap blow out bridge plug
back-pressure valve bedrock blow out preventer bridge-off
back-propagation bel blow-by bridging agent
backscatter bell nipple blowdown bridging material
backside belt effect blowdown valve (BDV) bridle
back-stripping benchmark blowing the drip Briggs color cube
backup curve beneficiate blowout bright spot
back-up ring beneficiation blowout preventer brine
backward multiple-contact test Benioff zone BLPD bring in the well
backwash bentonite BM British thermal unit
bactericide bentonite equivalent BOD broach
bad hole bevel gear operated (BGO) valve body relief valve (BRV) broadside array
balance point BGG body wave bromide brine
balanced activity oil mud BHA Boltzmann probability distribution bromocresol green
balanced array BHCT bomb Brookfield viscometer
balanced plug BHP bond log brownfield
balanced-activity oil mud BHST Bond number Brownian motion
ball catcher BHT bonnet brute stack
ball diverter bias bonus consideration BS&W
ball dropper bias weld Boolean simulation BTU
ball launcher bicarb booster bubble count
ball operated bicarbonate BOP bubble effect
ball out bicenter bit BOP stack bubble flow
ball sealers bichromate salt BOPD bubble point
ball valve bid and study agreement borehole bubblepoint
ball-operated big hole charge borehole compensation bubble-tight shutoff
ballout big-hole charge borehole correction bucking coil
band bilinear flow borehole gravity bucking current
band limited function billion cubic feet borehole gravity meter buffalo head
band pass billion cubic feet per day borehole orientation buffer
band reject bimetallic corrosion borehole seismic data buffer solution
band-limited function bimetallism borehole televiewer buffered mud
band-pass bin Born method buffered solution
band-reject Bingham plastic model bottle test buggy vibro
bank firing bioaccumulation bottomhole assembly buildup test
barefoot bioassay bottomhole choke bulk modulus
barefoot completion biochemical oxygen demand bottomhole circulating temperature bulk relaxation
barite biocide bottomhole gas separator bulk volume
barite plug bioconcentration bottomhole heater bull plug
barrel equivalent biodegradation bottomhole injection pressure (bhip) bullet perforating
barrel pump biopolymer bottomhole pressure bullhead
barrels of liquid per day biostratigraphic bottomhole sampler bump the plug
barrels of oil per day biostratigraphy bottomhole shut in bundle
barrels of water per day Biot theory bottomhole shut-in buoyancy
base exchange biphasic bottomhole static temperature buoyancy method
base log bird bottomhole temperature burn over
base map birefringence bottoms up burn shoe
base of weathering bit bottoms up mud sample burn-over
base oil bit box bottoms-up butt weld
base slurry bit breaker bottoms-up mud sample butterfly chart
base station bit nozzle Bouguer anomaly butterfly valve
baseline bit record Bouguer correction button resistivity
basement bit resistivity Bouma sequence buttress thread
basic wavelet bit trip bound fluid BWOB
basin bitumen bound water BWOC
basket bivariate analysis boundary conditions BWOW
basket flowmeter black list bounded reservoir BWPD
basket sub Blaine fineness bound-fluid log by weight of blend
batch mixer bland coring fluid bow tie by weight of cement
batch treatment blank pipe bow-spring centralizer by weight of water
battery blanket gas box bypass
battery site blast joint box plots bypass velocity
Bayesian inference blast sleeve Boyle's Law bypassed mud


C pump cementation exponent coal-seam gas continuity equation
cable cementer coarse continuous gas lift
cable head cementing coating continuous phase
cable-tool drilling cementing engineer coating flaw continuous reservoir
cake cementing plug COD contour
cake thickness centipoise coding contour interval
calcite centralizer COFCAW contour map
calcium bromide centrifugal pump cogeneration contract depth
calcium carbonate centrifuge coherence control line
calcium carbonate plug CERCLA coherence filtering control valve
calcium chloride cesium acetate coherence map controlled time survey
calcium contamination cesium formate coherence vector map controller
calcium hydroxide chain tongs coherent convection
calcium mud chalk coherent detection conventional mud
calcium naphthenate channel coherent noise conventional reservoir
calcium oxide channel wave coiled tubing convergence
calcium sulfate channeling coiled tubing completion convergent
calcium test character coiled tubing connector converted wave
calibration charged zone coiled tubing drilling conveyance
caliche Charpy test coiled tubing string convolution
caliper log check shot survey coiled tubing unit convolve
camera check valve coke copolymer
cap check-shot survey cokriging copper carbonate
cap rock chelate cold heavy oil production with sand core
cap the well chelating agent cold production core analysis
capacitance log chelation collapse pressure core gamma log
capacitance meter chemical barrel collar core image
capacity factor (of a valve), Cv, Kv chemical cutter collar locator core plug
capillary number chemical diversion collar lock core testing
capillary pressure curve chemical diverter collar log coreflooding
capillary suction time test chemical flooding collector coring fluid
capillary tube viscometer chemical injection collision corkscrew hole
capillary-suction-time test chemical marker injection colloid corrected gamma ray
caprock chemical neutron source colloidal correcting pressure to a datum
caprock effect chemical oxygen demand colloidal solids correlate
capsule gun chemical potential colloidal suspension correlation
carbide lag test chemical wash combi BOP correlation log
carbon density chemical-marker injection combination string correlogram
carbon dioxide Chenevert Method command trailer corrosion
carbon dioxide corrosion chert commercial rate corrosion control
carbonate cherty commingled completion corrosion coupon
carbonate gamma ray chloride test commingled flow corrosion fatigue
carbonate ion chlorite common depth point corrosion inhibitor
carbonate scale choke common midpoint corrosion rate
carbonate test choke line common midpoint method corrosion-resistant alloy (CRA)
carboxymethyl hydroxyethylcellulose choke manifold common offset cosolvent
carboxymethyl starch CHOPS common receiver cost oil
carboxymethylcellulose Christmas tree common reflection point cosurfactant
carried working interest chromate salt common source counterbalance weight
carrier fluid chrome free common source gather counterbalance winch
carrier gun chrome lignite common-offset coupling
carry over chrome lignosulfonate common-receiver coupon
carrying capacity chrome tubing common-source CPMG
carryover chrome-free common-source gather cracking
cartridge chromic salt communitization craton
cased hole chronostratigraphic chart compaction creaming
casing chronostratigraphy compaction correction crest
casing bowl churn flow company man cresting
casing burst pressure CI company representative critical angle
casing centralizer circle shooting compartment critical damping
casing collar circulate compartmentalization critical flow rate
casing collar locator (CCL) circulate out compatibility critical gas flow rate
casing collar log circulation compatible scales critical matrix
casing completion circulation device compensated density log critical moment
casing coupling circulation loss compensated neutron log critical rate
casing grade circulation sub compensated-density log critical reflection
casing gun circulation system competent crooked hole
casing hanger circulation time complete a well crop out
casing hardware circulation valve completion cross dipole
casing head citric acid completion fluid cross over
casing inspection log city gate completion quality (CQ) cross section
casing joint classical reservoir modeling completion skin crosscorrelate
casing patch clastic intrusion complex trace analysis crosscorrelation
casing point clastic sediment complex-trace analysis crosscorrelation flowmeter
casing potential profile clathrate composite frac tree crossflow
casing pressure clay composite log crossline
casing reciprocation clay bound water composite stream crosslinker
casing roller clay extender compositional fluid analysis crossover
casing scraper clay stabilizer compressibility crossover service tool
casing shoe clay swelling compression ratio crossplot
casing shoe test clay water interaction compressional wave crossplot porosity
casing spool clay-bound water compression-set packer cross-sectional
casing string clay-water interaction compressor crosswell electromagnetic tomography
casing swage clean compressor plant crosswell reflection tomography
casing test clean out Compton scattering crosswell seismic tomography
casing thread cleanout computed tomography crosswell tomography
casing valve cleanup concentric crown block
casinghead clear brine concentric fold crude oil
casing-inspection log clear water drilling conceptual model crushed zone
casing-potential profile clear-water drilling concession crust
cat line clevis condensate crustal magnetic field
cataclasite close in condensate liquids crystallization temperature
cataclastic closed chamber testing condensate ratio CSG
catagenesis closed in well condensed section CSS
cathead closed mud system condensing drive CT
cathodic protection closed-chamber testing conditional simulation cubic packing
cation exchange capacity closed-in well conductance cultural anomaly
cation-exchange capacity close-in conductive invasion cultural noise
catline closing unit conductive rock matrix model cumulative production
catwalk closure conductivity curing
caustic extraction test closure pressure conductometric titration curve
caustic potash cloud point conductor pipe curve fitting
caustic soda cloud point glycol conformable curve matching
cave effect cluster conformity cushion
cavings cluster analysis conical projection cut
cavitation CMC coning cut and thread fishing technique
CBM CMC-Hi Vis connate water cut oil
CDP CMC-HVT connection cut point
CEC CMC-Lo Vis connection gas cut-and-thread fishing technique
cellar CMC-LVT consistency Cutt point
cellulosic polymer CMHEC consistometer cuttings
cement CMP consolidated cuttings lifting
cement accelerator CMS consolidation CWA
cement additive CO2 injection constant composition expansion cycle condensate
cement bond log coal constant rate cycle gas
cement dispersant coal bed methane contact cycle skip
cement evaluation log coal gasification contact angle cycle time
cement extender coal seam gas contact time cyclic steam injection
cement head coalbed methane contaminant cycling plant
cement plug coal-bed methane contamination gas cyclothem
cement retainer coalesce continental shelf cylinder
cement retarder coalescence contingency plan cylinder operator
cement squeeze


damage derivative logs direct indicating viscometer drawdown test
damaged zone derrick direct-indicating viscometer drawworks
damping derrick floor directional driller drift
darcy derrickman directional drilling drill bit
Darcy units desander directional permeability drill collar
dart desiccant directional survey drill in fluid
data rate desilter directional variograms drill noise vertical seismic profile
datum desulfurize directional well drill pipe
datum correction detail log directivity drill ship
datum level detectable limit dirty drill solids
day rate detector disconformity drill string
daylight tour detergency discontinuity drillable packer
dB determinism disharmonic drilled solids
DD deterministic deconvolution dispersant driller
DEA unit deterministic methods dispersed bubble flow driller's depth
dead oil detonate dispersed clay drill-in fluid
Dean-Stark extraction detonating cord dispersion drilling break
decibel detonator displacement drilling contractor
decollement detrital displacement efficiency drilling crew
deconvolution detritus displacement fluid drilling detergent
deep induction development displacement front drilling fluid
deep penetrating charge deviated drilling disposal well drilling foreman
deep seismic sounding deviated hole dissolved solids drilling mud
deep tow deviation distillation extraction drilling procedure
deep-penetrating charge deviation survey distortion drilling program
deepwater play dew point distributed temperature log drilling rate
deep-water play dewatering distributed-temperature log drilling rig
deflector flowmeter dewpoint distribution drilling riser
deflocculant dextral diurnal variation drilling-fluid engineer
deflocculate diagenesis divergence drill-noise vertical seismic profile
deflocculated mud diagenetic diversion drillpipe
deflocculation diagenetic porosity diverter drillpipe conveyed
defoamer diameter of invasion diverter flowmeter drillship
defoaming plates diameter of investigation diverting agent drillstem
degasser diamond bit division order drillstem test
degree API diapir Dix formula drillstring
dehydrate diatom DMO drip
dehydration diatomaceous dog collar drip accumulator
dehydrator diatomite dog house droop
delay rental dichromate salt dog leg drop ball
deliverability test dielectric doghouse drop bar
delta dielectric constant dogleg drop sub
delta rho dielectric permittivity dolomite dropoff gun
delta t dielectric propagation log dolomitization drop-off gun
delta t stretch dielectric resistivity dolostone dropout
deltaic diesel oil mud domain dry bed
delta-t stretch diesel-oil mud domainal fabric dry bed dehydrator
demulsifier diesel-oil plug domainal structure dry combustion
densimeter difference map dome dry forward combustion
densitometer differential compaction dope dry gas
density differential pressure dosing pump dry hole
density contrast differential pressure sticking double block-and-bleed dry oil
density current differential SP double refraction dry rock
density measurement differential spectrum down dip dry-bed dehydrator
density profile differential sticking down lap DSS
departure curve differential temperature log down stream DST
dephasing differential weathering correction down stroke DST pressure chart
depleted zone differential-temperature log downdip dual completion
depletion difficult to disperse in salt downhole gauge dual induction
deployment system diffraction downhole receiver dual permeability reservoir
deposit diffraction stack downhole safety valve (DSV) dual porosity reservoir
depositional energy diffusion downhole sensors dual water
depositional environment diffusion equation downhole source dual-permeability reservoir
depositional system diffusion relaxation downlap dual-porosity reservoir
depth control dike downstream due diligence
depth controller dilatancy downstream pipeline dummy valve
depth conversion dilatancy theory downstroke dump bailer
depth correlation dilatation downward continuation duplex pump
depth datum dilatational wave Draeger tube dye penetrant inspection
depth derived diluent drag bag dyke
depth map dilution drag bit dynamic correction
depth mark dilution water drag-bag dynamic filter press
depth matched dim spot Dräger tube dynamic filtration
depth matching dip drain hole dynamic fluid level
depth migration dip correction drainage dynamic miscibility
depth of invasion dip fault drainage area dynamic positioning
depth of investigation dip moveout drainage volume dynamic range
depth point dip tube drained test dynamic seal
depth reference dipole drainhole dynamic-aging test
depth reference point dipole field drape dynamite
depth section direct emulsifier draw down dynamometer
depth wheel direct hydrocarbon typing drawdown dynamometer card


early time transient data electric gas-lift valves en echelon estimated ultimate recovery
early-time transient data electric probe encapsulation estuarine
earthquake electric submersible pump end point estuary
easy to disperse electrical anisotropy endfire array eta (η)
easy to disperse in salt electrical conductivity endless tubing Euclidian dimension
eccentralizer electrical coupon endpoint Euclidian distance
eccentric electrical double layer enhanced diffusion eustasy
eccentricity electrical impedance probe enhanced oil recovery eustatic
ECD electrical log entrained gas eustatic sea level
echo spacing electrical permittivity entrance hole evaporation pit
EDA electrical resistance probe environmental corrections evaporite
eddy current electrical resistivity eolian evaporitic
eddy current measurement electrical stability test EOR evening tour
eddy-current measurement electrical survey Eötvös number event
EDTA electrode device Epanechnikov kernel excavation effect
eel electrode resistivity epithermal neutron porosity measurement excess cement
effective laminar flow electrodynamic brake epm exit velocity
effective medium theory electrohygrometer epsilon (ε) expanding cement
effective permeability electrokinetic potential equalizing loop expanding gate valve
effective porosity electromagnetic caliper equalizing valve expansion joint
effective shot density electromagnetic heating equation of state expectation
effective velocity electromagnetic method equipotential method expendable gun
effective water saturation electromagnetic propagation equivalent circulating density expendable plug
effective wellbore radius electromagnetic propagation measurement equivalent conductance expert system
eigenvector electromagnetic thickness equivalent sack exploration
elastic elemental capture spectroscopy equivalent water resistivity exploration play
elastic anisotropy elevation correction equivalent weight exploratory
elastic constants elevator ERD explosive seismic data
elastic deformation embedded wavelet erode extended reach drilling
elastic impedance embrittlement erosion extended-reach drilling
elastic limit emergency shutdown valve (ESDV) erosion corrosion extensive dilatancy anisotropy
elastic moduli empirical erosion-corrosion external cutter
elastic neutron scattering emulsifier error external disturbance field
elastic wave emulsion ES test external phase
elasticity emulsion flow escape line external pulling tool
electric gas lift valves emulsion mud ESP external upset


fabric fines migration flow regime forward multiple-contact test
facies fingerboard flow simulation forward problem
facies modeling fingering flow stream fossil
fairway finite conductivity fracture flow structure four component seismic data
fall off test finite wellbore solution flow unit four dimensional seismic data
falloff test finite-conductivity fracture flow-after-flow tests four-component seismic data
fan shooting finite-wellbore solution flowback four-dimensional seismic data
Fann viscometer fire flooding flow-concentrating Fourier analysis
far water fireflooding flower structure Fourier synthesis
farmee firing head flowing neutron log Fourier transform
farmor first arrival flowing pressure Fourier transform infrared spectroscopy
farmout first break flowing well FPSO
fast diffusion first reading flowline frac balls
fast formation first-contact miscibility flowline manifold frac crew
fast formation arrival fish flowline mud sample frac fluid
fast Fourier transform fish eye flowline sample frac gel
fast neutron reaction fishbone wells flowmeter frac gradient
fast-formation arrival fishing flowstream frac gun
fast-neutron reaction fishing bell flowstream sample frac head
fatty acid fishing diagram flue gas frac iron
fatty acid soap fishing neck fluid compatibility test frac job
fatty-acid soap fishing tool fluid compressibility frac manifold
fault fitting fluid contact frac pump
fault trap five spot fluid density log frac stack
Faye correction five-spot fluid flow frac tree
FD fixed choke fluid interface log frac valve
fee simple interest fixed source method fluid invasion fractal
fee-simple interest fixed-cutter bit fluid level fractal analysis
feldspar fixed-source method fluid loss fractal networks
felsic f-k domain fluid loss control fracture
Fermat's principle f-k plot fluid loss control material fracture acidizing
ferro-chrome lignosulfonate flag fluid pound fracture conductivity
ferrous sulfide flag joint fluid tester fracture gradient
FFT flake LCM fluid-density log fracture half-length
fiber LCM flake lost circulation material fluid-friction reducer fracture networks
fiber lost circulation material flake lost-circulation material fluid-interface log fracture permeability
fiber lost-circulation material flange fluid-loss additive fracture porosity
field flange up fluid-loss control fractured well analysis
field weld flapper valve fluid-loss-control material fractured-well analysis
fill cement flare fluoboric acid fracturing fluid
fill sub flare gas fluoroscopy fracturing mandrel
film forming amine flash point flush joint fracturing manifold
film-forming amine flat gels flushed zone fracturing pressure
filter flattened section flushed zone water saturation fracturing sleeve
filter cake flexural mode flushed-zone water saturation free air correction
filter cake quality FLNG fluvial free fluid
filter cake thickness float collar flux leakage free gas
filter cell float joint fly ash free induction decay
filter loss float shoe foam breaker free point
filter media floc foam diversion free point indicator
filter medium flocculant foam flooding free water
filter press flocculate foam generator free water knockout
filtercake flocculation foamed cement free-air correction
filtercake quality flood front foaming agent free-induction decay
filter-cake quality flooding pattern foamy oil free-point indicator
filtercake thickness flooding surface fold free-water knockout
filter-cake thickness flow after flow footprint frequency
filtered brine flow after flow tests foreign content frequency domain
filters flow assurance formaldehyde fresh core
filtrate flow back formate fresh water
filtrate slump flow check formation Fresnel zone
filtrate tracer flow coefficient, Cv formation damage friction effect
filtrate volume flow concentrating formation evaluation friction reducer
filtration flow coupling formation evaluation while drilling froth flow
filtration test cell flow cross formation exposure time FT
filtration tester flow efficiency formation factor FTIR
final flow period flow line formation fluid full waveform
final flow rate flow loop formation fracture pressure Full-azimuth towed-streamer acquisition
final flowing pressure flow meter formation pressure fullbore
final shut in period flow model formation water fullbore spinner
final shut-in period flow period formic acid funnel viscosity
fine flow profile forward modeling FWKO


gain gasdrive geophysics gravel-pack screen
Gal gas-holdup log geopressure graveyard tour
galena gas-lift mandrel geopressure gradient gravimeter
Galling gas-lift valve geopressured gravimetry
galvanic anodes gas-oil contact geostatic pressure gravity
gamma (γ) gas-prone geostatistical methods gravity anomaly
gamma ray densitometer gas-solubility factor geostatistical modeling gravity drainage
gamma ray interactions gas-water contact geostatistics gravity override
gamma ray log gas-well deliverability geosteer gravity segregation
gamma-gamma log gaswell gas geosteering gravity survey
Garrett Gas Train gaswell liquids geothermal gradient gravity toolface
gas anchor gate valve Geronimo line gravity units
gas bearing gather GGT gravity-stable displacement
gas buster gathering lines ghost gray list
gas cap gathering system Gibbs' phenomenon grease injection system
gas cap drive gauge hole GIIP grease-injection system
gas chimney gauge pressure gilsonite greasing out
gas condensate gauge ring gin pole greedy algorithm
gas coning gauge tank gland bushing green gas
gas cut mud Gaussian collocated cosimulation glass jar test green list
gas deviation factor Gaussian techniques glauconite grey list
gas drive gel Global Positioning System grid
gas formation volume factor gel strength globe valve gridding
gas gravity gelation GLR gridding algorithm
gas holdup log gelled mud glycol grind
gas hydrate gelled up mud glycol absorber gripper blocks
gas in solution gelled-up mud glycol dehydrator gross production
gas injection gels glyph ground roll
gas interference generation goat head groundwater
gas lift geochemical log GOC group
gas lift mandrel geochemistry goose neck group interval
gas lift valve geochronology gooseneck group velocity
gas lock geologic GOR growth fault
gas migration geologic map government take guar gum
gas oil contact geologic time scale GPS guard electrode
gas processing plant geological GPTS guard log
gas prone geologist GR guide shoe
gas sand geology graben guided wave
gas separator geomagnetic polarity reversal gradiomanometer gumbo
gas shale geomagnetic polarity time scale grain density gun
gas show geomagnetic secular variation granite gun barrel
gas solubility factor geomechanics granular LCM gun clearance
gas volume fraction (GVF) geometric granular lost circulation material gun the pits
gas water contact geometrical factor granular lost-circulation material gun zero
gas well geophone grapple gunk
gas well deliverability geophone array gravel pack gunk plug
gas/liquid ratio (GLR) geophone cable gravel pack gun gunk squeeze
gas/oil ratio (GOR) geophone interval gravel pack log gunning the pits
gas-bearing geophone offset gravel pack screen GWC
gas-cap drive geophone pattern gravel-pack gun gyp mud
gas-cut mud geophysicist gravel-pack log gypsum


H2S HGS horizon slice hydraulic head
hade HHP horizontal drilling hydraulic horsepower
haematite hiatal horizontal resistivity hydraulic packer
halite hiatus horizontal separator hydraulic power pack
halo effect hierarchical cluster analysis horizontal transverse isotropy hydraulic power unit
hammer union high explosive horizontal tree hydraulic pumping
hangoff high pressure squeeze Horner slope hydraulic release tool
hard rock high shot density gun horst hydraulic set
hardbanding high side toolface hostile environment hydraulic-set
hardfacing high temperature completions hot lime hydrocarbon
hardground high-gravity solids hot oiler hydrocarbon indicator
hardness ion high-pressure air injection hot oiling hydrocarbon kitchen
harmonic high-pressure manifold hot tapping hydrochloric acid
harmonic distortion high-pressure squeeze hot waterflooding hydrocyclone
hatch high-pressure, high-temperature Hough transform hydrocycloning
HBP high-pressure, high-temperature filtration test housing hydrofluoric acid
HCl high-pressure, high-temperature viscometer HP starch hydrofluoric hydrochloric acid
HE starch high-shot density gun HPHT hydrofluoric-hydrochloric acid
head highside toolface HPHT filtration test hydrogen blistering
head wave high-side toolface HPHT viscometer hydrogen embrittlement
header high-specific-gravity solids HPU hydrogen index
header box highstand systems tract HSE hydrogen induced failures
heading history matching HTI hydrogen probe
heater HLB number HUD hydrogen sulfide
heater treater hodogram huff and puff hydrolysis
heavy metal holdup Humble formula hydrometer
heavy oil holdup depth humic acid hydrophile-lipophile balance number
heavy pipe holdup image humidity hydrophilic
heavyweight drillpipe holdup log humidity meter hydrophobic
HEC holdup map humping hydrophone
hectorite holdup meter HWDP hydrostatic bailer
held by production hole cleaning hybrid scale hydrostatic head
hematite hollow carrier gun hydrate hydrostatic pressure
Herschel Bulkley fluid homogeneity hydration hydrothermal
Herschel-Bulkley fluid homogeneous hydraulic bypass hydrothermal alteration
hertz homogeneous formation hydraulic cement hydroxyethyl starch
hesitation squeeze hook hydraulic centralizer hydroxyethylcellulose
heterogeneity hook load hydraulic disconnect hydroxypropyl starch
heterogeneous hookwall packer hydraulic fracture monitoring hygrometer
heterogeneous formation hopper hydraulic fracturing hygroscopic
HF horizon


ICD induction injectite inverse problem
ICV induction electrical survey injectivity test inversion
ID inelastic neutron scattering injector head invert emulsion
ideal gas inert sulfide in-line invert emulsion oil mud
IEOM inertial resistance insert inverted five spot
igneous infill drilling inside blowout preventer inverted five-spot
IIP infinite acting radial flow inside diameter invert-emulsion oil mud
illite infinite acting reservoir inside-out air seat test IO
ilmenite infinite conductivity fracture in-situ ion exchange
IM infinite-acting reservoir in-situ combustion IP
image infinite-conductivity fracture in-situ fluid analysis IPA
image well inflatable packer in-situ viscosity evaluation IPR
imbibition inflow control device instrument hanger iron carbonate
immature inflow control valve instrumented pig iron oxide
immiscible inflow performance relationship intelligent well iron stabilizer
impedance information theory intensifier iron sulfide
impeller inhibit interfacial tension iron-oxidizing bacteria
impermeable inhibited acid interference testing irreducible water
impermeable barrier inhibition intermediate casing ISO
impressed current anodes inhibitive mud intermediate casing string isochore
improved oil recovery inhibitor intermittent gas lift isochron
impulse activation initial flow period internal flash isochron map
impulsive seismic data initial reservoir pressure internal phase isochronal test
in line initial shut in period internal pulling tool isolated porosity
in situ initial shut-in period international nautical mile isomerized olefin
in situ combustion injection gas interpolation isopach
in situ fluid analysis injection line interpretation isopropanol
in situ viscosity evaluation injection mandrel interstitial gas isopropyl alcohol
incident angle injection pattern interstitial water isostasy
inclination injection pressure interval method isostatic
inclinometer injection pulsed neutron log interval transit time isostatic correction
incompetent injection pump interval velocity isotropic
indicator injection test interwell tomography isotropic formation
indicator methods injection water invaded zone isotropic permeability
indicator models injection well invasion isotropy
induced gamma ray spectroscopy injection well testing inverse iterative forward modeling
induced particle plugging injection/pulsed neutron log inverse filter iterative methods
induced polarization injection-well testing


J factor jar test jet perforating J-slot
J slot jet jet pump jug hustler
jacking frame jet cutter jet velocity junk
jackup jet hopper joint junk basket
jackup rig jet mixer Joule Thomson junk pusher
jar jet nozzle Joule-Thomson junk sub


K coefficient kerogen kill weight fluid k-means cluster analysis
kaolinite key stop kill-weight fluid knock out
karst keyseat kill-weight mud knockout
KB kh kilogram per cubic meter knot
kelly kick kilopascal Koch curve
kelly bushing kill kinetic effect kriging
kelly down kill line Kirchhoff equation kriging weights
kelly hose kill pump Kirchhoff migration kurtosis
kelly spinner


lacustrine least time path liquid hydrocarbons longitudinal plot
lag least-time path liquid level longitudinal relaxation
lag gas leonardite liquid saturation method long-path multiple
lag time lessor royalty liquid-junction potential long-spacing sonic log
Lamé constant levelwind listric fault loose emulsion
laminar flow LGS lithification lost circulation
laminated sand licensing round lithofacies lost circulation material
lamination life of the well lithologic lost returns
landing collar lifting frame lithologic contact lost-circulation material
landing nipple lifting sub lithology LOT
LAO light crude oil lithosphere Love wave
Laplace equation light hydrocarbons lithostatic pressure low colloid oil mud
laser diffraction light pipe lithostratigraphic low gravity solids
last reading lignin lithostratigraphic inversion low solids mud
last-shot detection lignite lithostratigraphy low solids nondispersed mud
late time transient data lignosulfonate littoral low specific gravity solids
lateral lime mud live cement low velocity layer
late-time transient data limestone live oil low yield clay
latex limestone compatible scale LNG low-colloid oil mud
layer limestone porosity unit LNGC low-gravity solids
layer cake geometry limestone-compatible scale load cell low-pressure, low-temperature filtration test
layer-cake geometry limited entry load oil low-salinity waterflooding
layered reservoir testing line drive local content low-solids mud
lb/bbl line source solution local holdup low-solids, nondispersed mud
lbm/bbl lineament local magnetic interference low-specific-gravity solids
LC50 linear alphaolefin local probe lowstand systems tract
LCM linear flow lock low-velocity layer
lead acetate test liner lock mandrel low-yield clay
lead cement liner hanger lock-up LPG
leak detection liner patch log LS
leak off line-source solution logarithmic mean lubricant
leakoff lip seal logging run lubricator
leakoff test lipophilic logging tool lubricity
leaky mode liquefied natural gas logging unit LWD
lean gas liquefied natural gas carrier logging while drilling lyophilic
lean gas condensate liquefied petroleum gas logging-while-drilling lyophilic colloid
lean glycol liquid additive long path multiple lyophobic
lean oil liquid blocking long spacing sonic log lyophobic colloid
lease liquid desiccant


m measurement range mineral interest mud acid
Mf measurements while drilling mineralogy mud additive
Ma measurements-while-drilling Minerals Management Service mud aging cell
mafic measuring tank minifrac mud anchor
magma mechanical diversion minimum miscibility concentration mud balance
magnesium test mechanical jar minimum miscibility enrichment mud cell
magnetic constant mechanical skin minimum miscibility pressure mud cleaner
magnetic field mechanical specific energy minimum restriction mud cup
magnetic flux leakage mechanical sticking minimum time path mud density
magnetic mud median minimum-time path mud engineer
magnetic particle inspection (MPI) medium induction minute mark mud filtrate
magnetic permeability membrane potential mis tie mud hopper
magnetic resonance memory gauge miscible mud house
magnetic reversal sequence meniscus miscible displacement mud in
magnetic toolface mercury displacement method missile mud in sample
magnetic total field metagenesis mist mud motor
magnetic-flux leakage metal gain mist drilling mud out
magnetics metal loss mist extractor mud out sample
magnetometer metal-to-metal seal mist flow mud oven
magnetotelluric method metamorphic mis-tie mud pit
main magnetic field metamorphism mixed deposits mud program
make a connection meter mixed metal hydroxide mud pulse telemetry
make up meter calibration mixed metal silicate mud report
make up water meter capacity mixed-metal hydroxide mud retort
makeup cathead meter difference mixed-metal silicate mud return line
makeup gas meter factor MMC mud scale
makeup tongs meter slippage MME mud still
make-up water methane MMH mud tracer
managed pressure drilling methane hydrate MMS mud up
mandrel methyl orange MMscf mud weight
manifold methyl orange alkalinity mobile offshore drilling unit mud-aging cell
mantle methylene blue dye mobility mudcake
map methylene blue test mobility buffer mudding off
marginal well methylglucoside drilling fluid mobility control mudding up
marine drilling riser mica mobility ratio mud-in sample
marine flooding surface micellar polymer flooding model mud-out sample
marker bed micellar-polymer flooding modeling mudrock
marker joint micelle modified isochronal test Multiazimuth towed-streamer acquisition
marketing agreement micrite MODU multi-capacitance flowmeter
marl microannulus modulus of compression multicomponent seismic data
marsh microbial enhanced oil recovery modulus of elasticity multifinger caliper
Marsh funnel microcylindrical log modulus of rigidity multilateral
Marsh funnel viscosity microemulsion Moho multipass method
mass balance microgel Mohorovicic discontinuity multiphase
massif microlaterolog moldic porosity multiphase flow
mast microlog moment multiphase fluid
mast unit micropaleontology monomer multiphase fluid flow
master valve microporosity monopole multiphase holdup log
material balance microresistivity Monte Carlo risk analysis multiphase meter
material balance equation microseismic monitoring Monte Carlo sampling multiphase pump
Material Safety Data Sheet microspherical log Monte Carlo simulation multiple completion
material-balance equation middle time transient data montmorillonite multiple isotope log
matrix middle-time transient data monument multiple isotope spectroscopy
matrix acidizing midoceanic ridge moon pool multiple rate tests
matrix stimulation midpoint morning tour multiple reflection
maturation midrange mosquito bill multiple regression
maturity migrate motorman multiple salinity
maximum flooding surface migration mousehole multiple service contract
maximum recorded temperature Milankovitch cycles moveable hydrocarbons multiple-contact miscibility
maximum treating pressure milk emulsion mud moved hydrocarbons multiple-isotope log
maximum working pressure (MWP) mill moveout multiple-isotope spectroscopy
Maxwell's equations mill out moving-source method multiple-rate tests
MBT test mill shoe MPD multishot survey
MD milligrams per kilogram mpy multiwell pad
mean milligrams per liter MRS mute
measure point milling Mscf/d mutual solvent
measured depth million standard cubic feet MSDS MWD
measurement after drilling mils per year penetration MT mysid shrimp
measurement error mineral mud


n neritic nipple up nonhydrocarbon contaminants
NACE nest nipple-down nonideal gas
naphthene base crude oil nested fractal structures nipple-up non-Newtonian fluid
naphthene-base crude oil net gas production nitrified fluid nonparticipating royalty
naphthenic hydrocarbon net oil production nitrogen cushion nonparticipating royalty interest
Narrow-azimuth seismic data net profits interest nitrogen injection nonrising stem
native clay net revenue interest nitrogen kickoff normal
native solids mud neural networks nitrogen lift normal fault
native state core neutral point nitrogen lifting normal incidence
native-solids mud neutralization nitrogen unit normal mode
natural completion neutralize NMO normal moveout
natural fracture neutralizing solution NMR normal moveout correction
natural frequency neutron activation log no go landing nipple normal pressure
natural gamma ray spectroscopy neutron capture NODAL* analysis normality
natural gas neutron generator no-go landing nipple normal-moveout correction
natural gas liquids neutron interactions noise NPDES
natural gasoline neutron log noise log NRM
natural remanent magnetism neutron porosity nominal filter nuclear fluid densimeter
naturally flowing well neutron-activation log nonconductive drilling fluid nuclear magnetic resonance
naturally occurring radioactive materials (NORM) Newtonian fluid nonconformity nuclear magnetic resonance measurement
nautical mile NGL non-Darcy flow numerical methods
near surface correction nipple nondestructive examination (NDE) numerical model
near-surface correction nipple down nondipole field numerical reservoir simulation
needle valve


OBC oil mining one-dimensional seismic data orogenic
OBR oil mud one-way time orogeny
observer oil on cuttings onlap OSHA
Occam's inversion oil pool OOC osmosis
ocean-bottom cable oil prone open flow potential osmotic pressure
OCMA oil sand open hole OSPAR
octahedral layer oil swelling open-flow potential outcrop
octanol oil water contact openhole outside diameter
octyl alcohol oil water interface openhole completion ovality limit
OD oil well openhole gravel pack over travel
off pattern well oil wet openhole packer overbalance
off-pattern well oil/brine ratio openhole test overburden
offset oil/water ratio opening bomb overflush
offset vertical seismic profile oil-base mud operating agreement overmature
offset VSP oil-emulsion mud operating gas-lift valve (OGLV) overpressure
offset well oilfield operating interest overriding royalty
Ohm's law oilfield battery operator overriding royalty interest
oil and gas lease oil-in-water emulsion optical index overshot
oil and gas separator oil-mud emulsifier optical probe overthrust
oil bank oil-prone organic acid overtravel
oil base mud oil-water contact organic deposit OWC
oil content oil-water interface organophilic OWR
oil emulsion mud oil-wet organophilic clay oxide closure model
oil field olefinic hydrocarbon organophilic lignite oxide-closure model
oil formation volume factor oligomer orifice meter oxygen activation
oil in water emulsion one dimensional seismic data orifice valve oxygen scavenger
oil kitchen one way time O-ring


p wave perpendicular offset polarization horn pressure-composition diagram
P&A perpendicular resistivity polarization time pressure-drawdown analysis
Pf petal basket flowmeter polished joint pressure-squared plot
Pm petrographic polished rod pressure-transient analysis
PAC petrography polyacrylamide pressure-transient well tests
pack off petroleum polyacrylate pressurized mud balance
packer petroleum system polyalkalene glycol primary cementing
packer flowmeter petroleum systems modeling polyalphaolefin primary completion components
packer fluid petrologic polyanionic cellulose primary migration
packing petrology polyanionic lignin primary porosity
packing gland petrophysical model polycrystalline diamond compact bit primary production
packoff petrophysical rock type polyelectrolyte primary recovery
pad pH polyglycerol primary recovery method
paddle blender pH test polymer primary reflection
paddle mixer phantom polymer flooding primary term
PAG phase polymer plug prime mover
paid up lease phase redistribution polyol primer cord
paid-up lease phase shift polyolefin principal axis
pair production phase shift resistivity polyphosphates principal component analysis
paleontology phase velocity polysaccharide probability
paludal phase velocity log pony rod probe
palynology phase-shift resistivity POOH processing
PAO phase-velocity log pooling produced fluid
paraffin phenolphthalein poppet valve produced water
paraffin base crude oil phosphate salt pore producing formation
paraffin control photoelectric effect pore gas producing well
paraffin inhibitor photon log pore pressure production
paraffin scraper PHPA pore pressure gradient production bonus
paraffin scratcher PHPA mud pore pressure transmission production log
paraffin-base crude oil PI pore throat production packer
paraffinic hydrocarbon pick pore-pressure gradient production payment
paraformaldehyde Pickett plot pore-pressure transmission production penalty
parallel fold pickle porosimeter production period
parallel resistivity pickling fluid porosity production service contract
parameter pickup porosity exponent production sharing contract
parametric pick-up porosity unit production string
parasequence pig porous production tree
parasequence boundary pig run porous medium production tubing
parasequence set pigging porous plate technique production wing
PARCOM pill portland cement productivity index (PI)
partial completion pilot mill portland cement clinker productivity test
partial penetration pilot test positive displacement motor profile
participating interest pilot-operated regulator positive displacement pump profile modification
particle plugging apparatus pin positive-displacement pump profile testing
particle size distribution pinch-out post profiling
particle-plugging apparatus pinion shaft post mature profit oil
particle-plugging test pipe dope post-mature progradation
particle-size distribution pipe heavy potassium progressive cavity pumping system
partitioning pipe light potassium ion progressive gels
parts per billion pipe rack potassium mud propagation constant
parts per million pipe ram potential field propagation resistivity
party pipe stretch pounds per barrel propagation resistivity measurement
party chief pipe trip pour point propagation time
party manager pipeline power fluid injection rate proppant
pascal pipeline capacity power law fluid propylene glycol normal propyl ether
pass pipeline gas power oil prorated well
passive margin pipeline oil power-fluid injection rate