gravity drainage reservoir

gravity drainage reservoir

[′grav·əd·ē ′drān·ij ‚rez·əv‚wär]
(geology)
A reservoir in which production is significantly affected by gas, oil, and water separating under the influence of gravity while production takes place.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.