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(19)

(11)

2 467 157

(13)

(51)

IPC

E21B33/138(2006-01-01)

E21B43/27(2006-01-01)

C09K8/44(2006-01-01)

C09K8/72(2006-01-01)

(21) (22)

Application

2011120943/03, 2011-05-24

(24)

Start date

2011-05-24

(22)

Actual filing date

2011-05-24

(45)

Published

2012-11-20

(72)

Inventor

Strizhnev Vladimir AlekseevichEmaletdinova Ljudmila DmitrievnaNigmatullin Timur Ehduardovich

(73)

Holder

Ooo Nauchno-Tekhnicheskij Tsentr"

METHOD OF CARBONATE BED PROCESSING Russian patent published in 2012 - IPC E21B33/138 E21B43/27 C09K8/44 C09K8/72

Abstract RU 2467157 C1

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to oil industry. Proposed method comprises injecting urea-formaldehyde resin-based cementing composition with acid buffer solution as hardener, and, additionally, injecting said acid buffer solution as delayed-action acid penetrating into oil-saturated portions of reservoir. Acid buffer solution with pH 2.0-5.0 in amount of 10-30 wt % per 100 wt % of urea-formaldehyde resin is used as hardener.

EFFECT: higher efficiency and well yield after isolation works.

2 cl, 2 tbl, 3 ex

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RU 2 467 157 C1

Authors

Strizhnev Vladimir Alekseevich

Emaletdinova Ljudmila Dmitrievna

Nigmatullin Timur Ehduardovich

Dates

2012-11-20—Published

2011-05-24—Filed