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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

a acrylamido methyl propane sulfonate 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 acrylate polymer amplitude distortion areal sweep efficiency
abandonment costs activation log amplitude variation with offset arenaceous
abnormal events active margin AMPS argillaceous
abnormal pressure active sulfide anaerobic armor
abrasion test activity of aqueous solutions analog aromatic content test
abrasive jetting acyclic compound anchor pin aromatic hydrocarbon
absolute age adapter spool angle of approach array
absolute filter additivity angle of incidence array induction
absolute open flow potential adhesion tension angular dispersion array laterolog
absolute permeability adjacent bed anhydrite array propagation resistivity
absolute pressure adjustable choke aniline point test array sonic
absorbing boundary conditions adjusted flow time anion arrival
absorptance adsorbed gas anionic arrival time
absorption 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 ASP flooding
accelerator source aerobic annular BOP asphalt
accelerometer aeromagnetic survey annular flow asphaltene onset concentration
accommodation AFE annular gas flow asphaltene onset pressure
accretion afterflow annular pressure asphaltene precipitation
accumulation AGC annular production asphaltenes
accumulator AGC time constant annular velocity asphaltic crude
accuracy agglomeration annuli 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 attenuate
acid job air drilling anticlinal attenuation
acid number air gun anticlinal trap attenuation resistivity
acid stimulation air shooting anticline attitude
acid tank air wave antifoam attribute
acid wash air-cut mud antifoam agent audio measurement
acidity Alford rotation antisqueeze aulacogen
acidize alias filter antithetic fault authigenic
acidizing aliasing antiwhirl bit authority for expenditure
acoustic alidade AOFP autochthon
acoustic basement aliphatic compound aperture autochthonous
acoustic coupler alkaline API cement autocorrelation
acoustic emission alkaline flooding API fluid loss test automatic gain control
acoustic impedance alkaline-surfactant-polymer flooding API fluid-loss test autotrack
acoustic impedance section alkalinity API gravity autotracking
acoustic log alkalinity test API unit AV
acoustic mode allochthon API water AVA
acoustic positioning allochthonous apparent anisotropy AVAZ
acoustic transducer allogenic apparent dip average reservoir pressure
acoustic transparency alluvial apparent matrix average velocity
acoustic traveltime alluvium apparent velocity AVO
acoustic velocity alpha processing apparent viscosity axial loading
acoustic velocity log altered zone apparent wavelength axial surface
acoustic wave alum applied-potential method axis of rotational symmetry
acquisition aluminum activation log appraisal azimuth
acquisition log aluminum stearate aquifer azimuthal
acrylamide acrylate polymer ambient temperature Archie equation azimuthal density
acrylamide polymer amides Archie rock azimuthal laterolog
acrylamide-acrylate polymer amines

B

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

C

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

D

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

E

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

F

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

G

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

H

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

I

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

J

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

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

L

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

M

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

N

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

O

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 orifice meter oxide-closure model
oil formation volume factor oligomer orifice valve oxygen activation
oil in water emulsion one dimensional seismic data O-ring oxygen scavenger
oil kitchen one way time

P

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

Q

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

R signal red mud reservoir heterogeneities rig down
Rwa redox reservoir modeling rig floor
rabbit reduced water slurry reservoir pressure rig up
racking back pipe reduced-water slurry reservoir quality (RQ) right angle set
radial array reducing agent reservoir simulation right of first refusal
radial differential temperature log reef reservoir-drive mechanisms right-angle set
radial differential-temperature log reefal residence time rigless operation
radial processing reel residual bend RIH
radial refraction reel back tension residual oil ring resistivity
radial resolution reel back-tension residual oil saturation ringworm corrosion
radial response reeled tubing resin rising-bubble apparatus
radio safe detonator reference point resistive invasion RM
radio silence reflection resistivity road box
radioactive tracer reflection coefficient resistivity index rock
radioactive tracer log reflection tomography resistivity log rock mechanics
radioactive-tracer log reflectivity resolution rock properties
radio-safe detonator reflector resolution matched Rockwell hardness number
radius of curvature refraction response matched rod elevators
radius of investigation refractive index restored state core rod pump
ram blowout preventer refractor retarder rod unit
ram preventer refracturing retention time roll a tank
random error regression retort roll line
random noise regression coefficient retort method roller cone bit
random walk method regressive retort solids roller stem
random-walk method relative age retort test roller-cone bit
range of load relative dielectric constant retrievable bridge plug rolling aging test
rarefaction relative dielectric permittivity retrievable gun rolling-aging test
rate dependent skin effect relative filtrate volume retrievable packer root mean square velocity
rate of penetration relative humidity retrogradation root-mean-square velocity
rate of shear relative permeability retrograde condensation ROP
rate-dependent skin effect relaxation time returns ROS
rathole relaxed filtrate oil mud reverse circulating valve rotary bushing
raw crude oil relaxed-filtrate oil mud reverse circulation rotary drilling
raw natural gas release joint reverse combustion rotary hose
ray relief valve reverse fault rotary steerable system
ray path relinquishment reverse-circulating valve rotary table
ray tracing remaining oil saturation reversing out rotational gas lift
Rayleigh wave remedial cementing RH roughneck
raypath remote sensing RH round thread
RCRA remotely operated vehicle rheologic round trip
real time data repeat section rheological roustabout
real-time data repeatability rheological property routine core analysis
ream replacement velocity rheology ROV
receiver reproducibility rheology modifier royalty
reciprocate reserve mud pit rhombohedral packing royalty interest
recirculating mixer reserve pit rich gas R-signal
record reserve-mud pit rich gas condensate rugose
recorded data reservoir rich glycol rugosity
recorder reservoir characterization rich oil run
recorder carrier reservoir characterization model Rich-azimuth towed-streamer acquisition run in hole
recoverable gas lift gas reservoir communication Ricker wavelet running squeeze
recovery reservoir description rift running tool
recovery factor reservoir drive mechanisms rig rupture disk
recovery forecast reservoir height

S

S wave shale oil SNG steam-assisted gravity drainage
sabkha shale shaker snub steamflood
sack shaly snubbers steam-oil ratio
sacrificial anode shaped charge snubbing stearate
safety clamp shear snubbing basket steerable motor
safety head shear modulus snubbing force stem
safety joint shear pin snubbing jack stem indicator
safety spacer shear ram soak phase step profile
safety valve shear rate soap step rate test
sag shear seal BOP soda ash stick and slip
SAGD shear stock sodium acid pyrophosphate stimulation
salt shear strain sodium bicarbonate stimulation byproduct
salt dome shear strength sodium carbonate stimulation fluid
salt plug shear strength measurement test sodium chromate stochastic analysis
salt proximity survey shear stress sodium dichromate stochastic methods
salt proximity vertical seismic profile shear wave sodium hydroxide stochastic modeling
salt proximity VSP shearometer sodium phosphate stock tank
salt-proximity vertical seismic profile shear-seal BOP sodium polyacrylate stock tank barrel
salt-proximity VSP shear-strength measurement test sodium silicate stock-tank oil initially in place
saltwater flow sheave soft line stock-tank original oil in place
saltwater mud sheen soft rock STOIIP
sample rate sheen test soft water Stoneley permeability
sampling error shifted spectrum Solar terrestrial rhythms Stoneley wave
sampling interval shifting tool solid desiccant STOOIP
sand shoe solubility stopple
sand bailer shoe joint solution gas storm choke
sand cleanout shoe track solution gas drive storm packer
sand consolidation shoot a level solution gasdrive STP
sand control shoot a well sonde strain
sand lifting short trip sonde error strap
sand line short-path multiple sonic strapping tape
sand out shot depth sonic log strata
sand production shot detection sonic measurement stratified flow
sand test shot point sonolog stratigraphic analysis
sand trap shotpoint SOR stratigraphic trap
sandface shoulder bed sorting stratigraphy
sandout show sound stratum
sandstone shrimp test sour streamer
sandstone compatible scale shut in bottomhole pressure sour corrosion streamer feathering
sandstone petrography shut in royalty sour crude oil strength retrogression
sandstone porosity unit