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2 170 816

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IPC

(21) (22)

Application

2000124903/03, 2000-10-03

(24)

Start date

2000-10-03

(22)

Actual filing date

2000-10-03

(45)

Published

2001-07-20

(72)

Inventor

Takhautdinov Sh.F.Khisamov R.S.Ibatullin R.R.Dobroskok B.E.Kubareva N.N.Musabirov R.Kh.Shakirov A.N.Zheglov M.A.Kandaurova G.F.Khannanov R.G.Salikhov I.M.Jusupov I.G.Jakovlev S.A.Ganeeva Z.M.Ibragimov N.G.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo

METHOD OF INCREASE OF OIL RECOVER FROM NON-UNIFORM PERMEABLE FORMATIONS AT LATE STAGE OF OIL DEPOSIT DEVELOPMENTS Russian patent published in 2001 - IPC

Abstract RU 2170816 C1

FIELD: oil producing industry. SUBSTANCE: method includes injection of working agent and polymer aqueous solution into formation through injection wells and oil withdrawal through producing wells. Polymer aqueous solutions is injected together with cross-linking agent. After allowing to stand for 1-6 days, injected additionally is low-concentrated aqueous solution of sodium carboxymethyl cellulose with cross-linking agent, and after 1-6 days of standing, working agent is additionally injected. Before, during and after injection of polymer aqueous solution with cross-linking agent, or together with polymer solution with cross-linking agent, filling agent is injected. EFFECT: increased oil recovery from oil pool. 2 cl, 5 ex

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RU 2 170 816 C1

Authors

Takhautdinov Sh.F.

Khisamov R.S.

Ibatullin R.R.

Dobroskok B.E.

Kubareva N.N.

Musabirov R.Kh.

Shakirov A.N.

Zheglov M.A.

Kandaurova G.F.

Khannanov R.G.

Salikhov I.M.

Jusupov I.G.

Jakovlev S.A.

Ganeeva Z.M.

Ibragimov N.G.

Dates

2001-07-20—Published

2000-10-03—Filed