05273111 is referenced by 48 patents and cites 50 patents.

A method which combines fluid drive and gravity drainage to produce hydrocarbons from a subterranean formation comprises injecting a fluid through at least two upper horizontal wells out into the formation for moving hydrocarbons from the formation into at least one lower horizontal well through which the hydrocarbons are produced, wherein each lower horizontal well is spaced laterally and vertically below and between two respective upper horizontal wells; and producing hydrocarbons through the at least one lower horizontal well at a cumulative rate faster than the cumulative rate of the fluid injected into the upper horizontal wells. The method further comprises injecting a fluid and producing hydrocarbons as just described but with additional upper and lower horizontal wells longitudinally spaced from the first-mentioned upper and lower horizontal wells so that each of the lower horizontal wells operates as a discrete production well.

Title
Laterally and vertically staggered horizontal well hydrocarbon recovery method
Application Number
7/907147
Publication Number
5273111
Application Date
July 1, 1992
Publication Date
December 28, 1993
Inventor
William J McCaffrey
Calgary
CA
Geryl O Brannan
Calgary
CA
Agent
Frank J Sroka
Richard A Kretchmer
James A Gabala
Assignee
Amoco Corporation
IL, US
IPC
E21B 43/30
E21B 43/24
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