Darcy, Darcys, Darcies
Darcy's equation
Dead oil
Dead time
Decay
Decay time
Decentralize
Decentralizer
Deep investigation
Deep propagation log
Deep well thermometer
Deflection
Degrees API (°API)
Dehydrate
Delaware gradient
Delay panel
Delayed gamma ray
Delta-t, Δt
Densimeter
Density
Density log
Departure
Departure curves
Deplete
Depositional environment
Depth column
Depth-control log
Depth datum
Depth of invasion
Depth of investigation
Depth scales
Derrick
Derrick floor
Detail log
Detector
Detonate
Detonator
Detrital sediment
Development well
Deviated hole
Deviation
Deviation angle
Deviation survey
Dew point
D exponent
DF
Diagenesis
Diagenetic porosity
Diameter of invasion
Diapir
Diatoms
Diatomite
Dielectric
Dielectric constant
Differential log
Differential pressure
Differential-pressure sticking
Differential SP
Differential temperature survey
Diffuse layer
Diffusion
Diffusion effect
Diffusion potential
Digital
Digitize
Dilatancy
Diode error
Dip
Dip log
Diplog
Dip log tool – 4 arm
Dipmeter, dipmeter tool
Dipmeter log
Directional drilling
Directional hole
Directional log
Directional survey
Dirty
Discontinuous phase
Discovery well
Disequilibrium
Dispersed
Displacement
Disposal well
Dissociation
Dissolution porosity
Dissolved-gas drive
Distillate
Ditch gas
Doghouse
Dogleg
Dolomite
Dome
Downhole
Downhole ground
Down time
Drainage
Drainage radius
Drawdown
Drawworks
Drift
Drift angle
Drill bit
Drill collar
Driller
Drilling break
Drilling exponent
Drilling log
Drilling mud
Drilling riser
Drilling-time log
Drilling Porosity Log
Drill pipe
Drill Pipe Electric Log
Drill stem
Drill-stem test
Drill string
Dry gas
Dry hole
Dry rock
DST
Dual completion
Dual Dipmeter
Dual guard log
Dual induction log
Dual laterolog
Dual-spaced density log
Dual-spaced thermal decay log
Dual-spaced neutron log
Dual porosity CNL
Dual-spacing formation density log
Dual-Spacing Thermal Decay Time Log
Dynamic
Dynamic measure point
Dynamic positioning