Subterranean formation permeability contrast correction methods

Details Subterranean formation permeability contrast correction methods Subterranean formation permeability contrast correction methods

1991-03-12

1991-12-31

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

166270, 166295, E21B 33138, E21B 4320, E21B 4322

Patent

active

050763628

ABSTRACT:
Improved methods of correcting the vertical permeability contrast of a subterranean formation to improve the sweep efficiency of waterflooding operations carried out therein wherein the subterranean formation contains at least one high permeability zone lying adjacent and in fluid communication with at least one low permeability zone are provided. In accordance with the methods, a near well bore portion of the high permeability zone is plugged and a crosslinked gel is formed at least at the boundary between the low permeability zone and the high permeability zone whereby fluid communication between the zones is reduced.

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