Displacement fluid
In well cementing, the fluid, usually drilling mud or salt water, that is pumped into the well after the cement is pumped into it to force the cement out of the casing and into the annulus.
Distance sensitive tariff
Namely, when the tariff levied on the transmission of the energy (electricity, fuel, gas) is based on the distance covered by the energy rather than being a postalized tariff where the price is identical for all consumers regardless of their distance away from the source of supply. A transmission tariff could be distance-sensitive or not …
Doghouse
A portable, one-room shelter at a well site for the convenience and protection of the drilling crew and others. The doghouse serves as lunch room, change house, dormitory, and for keeping small supplies and records
Dolomite
Named for the French mineralogist Deodat de Dolomieu, is a common sedimentary rock-forming mineral that can be found in massive beds several hundred feet thick. They are found all over the world and are quite common in sedimentary rock sequences
Double dividend
Refers to the notion that environmental taxes can both reduce pollution (the first dividend) and reduce the overall economic costs associated with the tax system by using the revenue generated to displace other more distortionary taxes that slow economic growth at the same time (the second dividend).
Drill or drop decision
Decision to either drill the well if it can be done economically or to drop the project
Drill pipe
A heavy, thick-walled steel pipe used in rotary drilling to turn the drill bit and to provide a conduit for the drilling mud.
Drill string; Drillstring; String; String of pipes
As the hole of the well gets deeper, pipe is added to the drill bit to allow it to dig further. These lengths of drill pipe form the drill string
Direct Hydrocarbon Indicators
These are features one can see on seismic that are caused by the seismic wave passing through a gas or oil filled section rather than a water filled section. Some DHI’s can also be caused by other geological features which have nothing to do with oil or gas, such as dykes or sills that will …
Distillation
Distillation is the process of heating a liquid until it boils, capturing and cooling the resultant hot vapors, and collecting the condensed vapors. Distillation is a powerful tool, both for the identification and the purification of organic compounds. The boiling point of a compound—determined by distillation—is well-defined and thus is one of the physical properties …