E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 37/06 (2006.01) C02F 5/10 (2006.01) C02F 5/14 (2006.01) C09K 8/528 (2006.01)
Patent
CA 2193038
A process for fixing of a scale inhibitor in a subterranean formation, which comprises: a) injecting into the formation a solution comprising a polymeric scale inhibitor, a metal ration, a precursor and a weak organic acid, wherein the polymeric scale inhibitor and metal cation are slightly soluble in water in the formation and wherein the precursor reacts in the formation to produce an alkaline compound which causes the polymeric scale inhibitor to precipitate in the formation; and b) allowing the polymeric scale inhibitor to precipitate in the formation in an amount which is effective in inhibiting scale formation for a given period of time.
Bezerra Maria Carmen Moreira
Do Rosario Francisca Ferreira
Khalil Carlos Nagib
Rondinini Sandra Botelho
Gowling Lafleur Henderson Llp
Petroleo Brasileiro S.a. - Petrobras
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