Selective placement of a permeability-reducing material to inhib

Details Selective placement of a permeability-reducing material to inhib Selective placement of a permeability-reducing material to inhib

1990-10-12

1991-11-26

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

166273, 166285, 166294, 166295, 166300, E21B 33138, E21B 4322

Patent

active

050675648

ABSTRACT:
Undesirable fluid flow is inhibited between a near well bore interval and an underlying aquifer in fluid communication therewith. A permeability-reducing material is injected into the near well bore interval and a portion of the material is selectively overdisplaced out into the formation by means of a low density gas subsequently injected into the interval. The gas desirably restores hydrocarbon productivity or fluid injectivity to the interval while the permeability-reducing material remaining in the interval inhibits fluid communication between the interval and the aquifer.

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Blankenship, Michel L., "Polymer Process Cuts Water Coning", American Oil and Gas Reporter, pp. 17-19, Jul. 1989.

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