E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
402/1, 117/183,
E21B 33/138 (2006.01) B01J 31/02 (2006.01) C08F 4/00 (2006.01) C08G 65/36 (2006.01) C08J 3/24 (2006.01) C08K 11/00 (2006.01) C09K 8/508 (2006.01) C09K 8/60 (2006.01)
Patent
CA 1045282
ABSTRACT OF THE DISCLOSURE In an improved method for the treatment of a permeable formation or zone adjacent to the bore of an oil well, the setting time of an acid-settable liquid is predictably delayed by use of a novel catalyst system. The method provides an effective means for controlling the reduction of the permeability of the formation or zone in a single stage treatment by dis- solving the catalyst in the liquid and introducing the solution into the formation. The catalyst system comprises a mixture of a suitable acid-releasing compound and a base.
176382
Chevron Research And Technology Company
Na
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