E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/26
E21B 43/22 (2006.01) C09K 8/502 (2006.01) E21B 43/32 (2006.01)
Patent
CA 1124171
TREATING UNDERGROUND FORMATIONS (D#73,415-F) ABSTRACT OF THE DISCLOSURE Disclosed is a method for treating subterranean formations such as underground petroleum-containing forma- tions penetrated by a well, and particularly a formation penetrated by a producing well which formation contain a plurality of zones, one or more of which are producing petroleum and one or more of which are producing water. The treatment selectively reduces the permeability of the water- producing intervals without adversely affecting the permeabi- lity of the oil producing intervals, thereby reducing the production of water and reducing the water-oil ratio of the fluid being produced from the well. The treatment method involves introducing an effective amount of a liquid compris- ing a hydrocarbon having dispersed therein an unhydrated water swellable clay such as bentonite, a sodium montmoril- lonite. The clay swells on contacting water in the water- producing intervals and plugs or reduces the permeability of the flow channels in the water-producing intervals. -I-
337249
Noles John R.
Walker Clarence O.
White Nikolas F.
Smart & Biggar
Texaco Development Corporation
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