===== Terms beginning with D ===== [[darcy|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|Degrees API (°API)]] [[Dehydrate]] [[Delaware gradient]] [[Delay panel]] [[Delayed gamma ray]] [[Delta t|Delta-t, Δt]] [[Densimeter]] [[Density]] [[Density log]] [[Departure]] [[Departure curves]] [[Deplete]] [[Depositional environment]] [[Depth column]] [[Depth control log|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-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, 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|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-time log]] [[Drilling Porosity Log]] [[Drill pipe]] [[Drill Pipe Electric Log]] [[Drill stem]] [[Drill stem test|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 density log]] [[Dual spaced thermal decay log|Dual-spaced thermal decay log]] [[Dual spaced neutron log|Dual-spaced neutron log]] [[Dual porosity CNL]] [[Dual spacing formation density log|Dual-spacing formation density log]] [[Dual-Spacing Thermal Decay Time Log]] [[Dynamic]] [[Dynamic measure point]] [[Dynamic positioning]]