E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/31, 31/33
E21B 43/28 (2006.01) C09K 8/528 (2006.01)
Patent
CA 1196271
A B S T R A C T A productivity-impairing water-block is removed from a subterranean reservoir by injecting an aqueous alkaline solution containing both an alkali metal borohydride and an acid-yielding reactant which is relatively slowly reactive.
442406
Morgenthaler Lee N.
Southwick Jeffrey G.
Shell Canada Limited
Smart & Biggar
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