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


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


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


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


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


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


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


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


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


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


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


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


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


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


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


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


p rate petal basket flowmeter polished joint pressure-composition diagram
p wave petrographic polished rod pressure-drawdown analysis
P&A petrography polyacrylamide pressure-squared plot
Pf petroleum polyacrylate pressure-transient analysis
Pm petroleum system polyalkalene glycol pressure-transient well tests
PAC petroleum systems modeling polyalphaolefin pressurized mud balance
pack off petrologic polyanionic cellulose primary cementing
packer petrology polyanionic lignin primary completion components
packer flowmeter petrophysical model polycrystalline diamond compact bit primary migration
packer fluid petrophysical rock type polyelectrolyte primary porosity
packing pH polyglycerol primary production
packing gland pH test polymer primary recovery
packoff phantom polymer flooding primary recovery method
pad phase polymer plug primary reflection
paddle blender phase redistribution polyol primary term
paddle mixer phase shift polyolefin prime mover
PAG phase shift resistivity polyphosphates primer cord
paid up lease phase velocity polysaccharide principal axis
paid-up lease phase velocity log pony rod principal component analysis
pair production phase-shift resistivity POOH probability
paleontology phase-velocity log pooling probe
paludal phosphate salt pore processing
palustrine photoelectric effect pore gas produced fluid
palynology photon log pore pressure produced water
PAO PHPA pore pressure gradient producing formation
paraffin PHPA mud pore pressure transmission producing well
paraffin base crude oil pick pore throat production
paraffin control Pickett plot pore-pressure gradient production casing
paraffin inhibitor pickle pore-pressure transmission production log
paraffin scraper pickling fluid porosimeter production packer
paraffin scratcher pickup porosity production period
paraffin-base crude oil pick-up porosity exponent production service contract
paraffinic hydrocarbon pig porosity unit production sharing contract
paraformaldehyde pig run porous production string
parallel fold pigging porous medium production tree
parallel resistivity pill porous plate technique production tubing
parameter pilot mill portland cement production wing
parametric pilot test portland cement clinker productivity index (PI)
parasequence pilot-operated regulator positive displacement motor productivity test
parasequence boundary pin positive displacement pump profile
parasequence set pinch out positive-displacement pump profile modification
PARCOM pinch-out post profile testing
partial completion pinion shaft post mature profiling
participating interest pipe dope post-mature profit oil
particle plugging apparatus pipe heavy potassium progradation
particle size distribution pipe light potassium ion progressive cavity pumping system
particle-plugging apparatus pipe rack potassium mud progressive gels
particle-plugging test pipe ram potential field propagation constant
particle-size distribution pipe stretch pounds per barrel propagation resistivity
partitioning pipe trip pour point propagation resistivity measurement
parts per million pipeline power fluid injection rate propagation time
party pipeline capacity power law fluid proppant
party manager pipeline gas power oil propylene glycol normal propyl ether
pass pipeline patrol power-fluid injection rate prorated well
passive margin piston effect power-law fluid proration unit
patch PIT pozzolan prospect
pay pitch-and-lead pozzolanic proximity log
payout Pitot tube PPA pseudogeometrical factor
PDC bit pitting ppb pseudoplastic
PDM plane table ppg pseudopressure plot
peak plane wave ppm pseudostatic spontaneous potential
peak shaving plankton PPT pseudosteady state
PEF plant p-rate pull out of the hole
peg leg multiple plastic precipitate pull up
peg-leg multiple plastic deformation precipitation pulling tool
pendant-drop tensiometer plastic fluid precision pull-up
peptized clay plastic viscosity preferential right to operate pulse echo
peptizing agent plate out preferential right to purchase pulsed neutron holdup log
perforate plate tectonics preflush pulsed neutron spectroscopy log
perforate overbalanced plateau pregelatinized starch pulsed neutron spectroscopy measurement
perforate underbalanced play prehydrate pulsed-neutron holdup log
perforated interval play back prehydrated bentonite pulse-echo
perforated liner playback prehydration pump cavitation
perforating acid PLT premium thread pump manifold
perforating charge plug and abandon preservation pump off
perforating depth control log plug flow preservative pump submergence
perforating depth-control log plug valve preserved core pump volumetric efficiency
perforating fluid plugging material pressure buildup analysis pumpability
perforating gun plunge pressure capability pumper
perforation plunger lift pressure depletion pumping schedule
perforation density plunger overtravel pressure drawdown pumping time
perforation penetration PNP pressure falloff pumping well
perforation phasing POD pressure gauge pumping well tests
periodogram point bar pressure gradient pump-off
permafrost point of departure pressure hunt push down
permanent well monitoring poise pressure integrity test push-down
permeability Poisson's ratio pressure sender pusher
permeability thickness polar pressure squared plot PV
permeable polar compound pressure storage tank PVT
permeameter polarity pressure transient analysis P-wave
permittivity polarity standard pressure transient test pyrolysis
perpendicular offset polarization horn pressure transient well test pyrophosphate
perpendicular resistivity polarization time pressure transient well tests pyrrhotite


Q quality assurance quat amine quick look
Q wave quantile map quaternary amine quicklook
QA quartz quebracho quitclaim
quadrant density quat quick lime Q-wave


R signal recovery forecast reservoir heterogeneities rig up
Rwa recycled gas reservoir modeling right angle set
rabbit red mud reservoir pressure right of first refusal
racking back pipe redox reservoir quality (RQ) right-angle set
radial array reduced water slurry reservoir simulation rigless operation
radial differential temperature log reduced-water slurry reservoir-drive mechanisms RIH
radial differential-temperature log reducing agent residence time ring resistivity
radial processing reef residual bend ringworm corrosion
radial refraction reefal residual oil rising-bubble apparatus
radial resolution reel residual oil saturation RM
radial response reel back tension resin road box
radio safe detonator reel back-tension resistive invasion rock
radio silence reeled tubing