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2 147 677

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IPC

(21) (22)

Application

98122617/03, 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 OIL RECOVERY FROM CARBONATE RESERVOIRS Russian patent published in 2000 - IPC

Abstract RU 2147677 C1

FIELD: oil producing industry, particularly, methods of oil recovery from carbonate reservoirs; applicable for increasing recovery of difficulty recoverable oil reserves. SUBSTANCE: method consists in injection into carbonate formation of portions of aqueous solution of alkali sewage of caprolactam production at pH <2, saturated monobasic alcohols and oil-soluble light hydrocarbons with their subsequent removal or advancing of fringes over carbonate formation with water. Mineral acid is introduced in solution for regulation of pH. Coefficient of oil recovery increases by 9.7%. EFFECT: higher efficiency of oil recovery from formation. 2 cl, 1 dwg, 4 tbl, 1 ex

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RU 2 147 677 C1

Authors

Chendarev V.V.

Vasjasin G.I.

Shakirov A.N.

Zheglov M.A.

Dates

2000-04-20—Published

1998-12-15—Filed