Oil and Gas at Your Door? (2005 Edition) - Earthworks
Oil and Gas at Your Door? (2005 Edition) - Earthworks
Oil and Gas at Your Door? (2005 Edition) - Earthworks
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Glossary<br />
development well<br />
A well drilled within the proved area of an oil or gas reservoir to the depth of a geological form<strong>at</strong>ion<br />
known to be productive.<br />
directional drilling<br />
Drilling <strong>at</strong> an angle from the vertical. Controlled directional drilling makes it possible to reach<br />
subsurface areas l<strong>at</strong>erally distant from the point where the drill bit enters the earth.<br />
disposal well<br />
Well used for disposal of produced w<strong>at</strong>er into an underground form<strong>at</strong>ion.<br />
downhole<br />
Pertaining to the wellbore, as opposed to activities <strong>and</strong> equipment associ<strong>at</strong>ed with the surface.<br />
drill bit<br />
The cutting or boring element used in drilling oil <strong>and</strong> gas wells. The bit consists of the cutting<br />
elements <strong>and</strong> the circul<strong>at</strong>ing element. The circul<strong>at</strong>ing element allows the passage of drilling<br />
fluid <strong>and</strong> uses the hydraulic force of the fluid to improve drilling r<strong>at</strong>es.<br />
drill cutting analysis<br />
Also known as drill core analysis, it is the analysis of cuttings or core samples to determine characteristics<br />
such as porosity, permeability <strong>and</strong> probable productivity of the form<strong>at</strong>ion.<br />
drilling fluid<br />
Specially formul<strong>at</strong>ed liquid circul<strong>at</strong>ed through the wellbore during rotary drilling oper<strong>at</strong>ions.<br />
Used to bring cuttings from the wellbore to the surface; to lubric<strong>at</strong>e <strong>and</strong> cool the drill bit, string,<br />
line, <strong>and</strong> walls of the well; <strong>and</strong> provides weight to counteract downhole form<strong>at</strong>ion pressure. Also<br />
known as drilling mud.<br />
drilling mud<br />
See drilling fluid.<br />
drilling unit<br />
The maximum area from which one well can efficiently <strong>and</strong> effectively extract the oil or gas.<br />
Drilling unit size is determined by a st<strong>at</strong>e agency.<br />
drilling window<br />
The section of a drilling unit where drilling must take place.<br />
dry gas<br />
N<strong>at</strong>ural gas th<strong>at</strong> does not have a significant content of liquid hydrocarbons or w<strong>at</strong>er vapor.<br />
dry hole<br />
A drilled well th<strong>at</strong> does not produce oil or gas in commercial quantities.<br />
E<br />
easement<br />
A temporary right given to a non-owner of the l<strong>and</strong> for a specific purpose; i.e., an easement to<br />
lay a pipeline from a well, cross the l<strong>and</strong> with a road, etc.<br />
EPA<br />
Abbrevi<strong>at</strong>ion for the Environmental Protection Agency, a federal department.<br />
Glossary-4
Change language