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2 147 679

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IPC

(21) (22)

Application

98122627/03, 1998-12-15

(24)

Start date

1998-12-15

(22)

Actual filing date

1998-12-15

(45)

Published

2000-04-20

(72)

Inventor

Chendarev V.V.Vasjasin G.I.Shakirov A.N.Zheglov M.A.

(73)

Holder

Chendarev Vladimir VladimirovichVasjasin Georgij IvanovichShakirov Al'Bert NailovichZheglov Mikhail Aleksandrovich

METHOD OF ACID TREATMENT OF OIL FORMATION Russian patent published in 2000 - IPC

Abstract RU 2147679 C1

FIELD: oil producing industry, particularly, methods of acid treatment of oil formation; applicable in raising productivity and injectivity of injection wells and oil recovery of difficulty recoverable oil reserves. SUBSTANCE: method consists in injection into formation of alkali sewage of caprolactam production and mineral acid with addition to them of surfactants in the amount of 0.05-5 wt.%. In this case, use may be made of ionic and nonionic surfactants. EFFECT: higher oil recovery from formations in districts with difficulty recoverable oil reserves. 3 cl, 2 tbl

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RU 2 147 679 C1

Authors

Chendarev V.V.

Vasjasin G.I.

Shakirov A.N.

Zheglov M.A.

Dates

2000-04-20—Published

1998-12-15—Filed