METHOD OF RESIDUAL OIL DISPLACEMENT FROM INUNDATED OIL FORMATION Russian patent published in 2000 - IPC

Abstract RU 2156354 C1

FIELD: oil producing industry. SUBSTANCE: method includes injection into formation of plugs of solutions of polyacrylamide, water and aluminum salts. Used as additive to polyacrylamide solution is biopolysaccharide produced by microorganism ACINETOBATER sp. With volume ratio with polyacrylamide of 1(0.1-1). Low-mineralized water is used as water plug. Plugs are forced into formation by water-air mixture containing salts of nitrogen and phosphorus and microorganisms in concentration of, at least, 10⁹ cell/1. EFFECT: higher oil recovery due to optimization of gel formation in formation, equalization of injectivity profile. 2 cl, 1 tbl, 1 ex

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RU 2 156 354 C1

Authors

Ivanov A.I.

Ikhsanov V.B.

Smirnov S.R.

Dates

2000-09-20—Published

2000-03-02—Filed