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2 149 988

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C1

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IPC

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Application

98121661/03, 1998-11-23

(24)

Start date

1998-11-23

(22)

Actual filing date

1998-11-23

(45)

Published

2000-05-27

(72)

Inventor

Andreson B.A.Murzagulov G.G.Rudakov S.D.Nazmiev I.M.Gabdullin R.G.Koshelev V.N.

(73)

Holder

Aktsionernaja Neftjanaja Kompanija Bashneft'

COMPOSITION FOR TREATING FORMATION BOTTOM ZONE Russian patent published in 2000 - IPC

Abstract RU 2149988 C1

FIELD: oil and gas production. SUBSTANCE: aqueous composition contains 1.0-3.0 wt % of various-activity surfactant (mixture of nonionic surfactant, hydrocarbon solvent, and nitrogen-containing additive) and 1.0-3.0 wt % of potassium chloride. EFFECT: restored permeability of formation. 2 tbl

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RU 2 149 988 C1

Authors

Andreson B.A.

Murzagulov G.G.

Rudakov S.D.

Nazmiev I.M.

Gabdullin R.G.

Koshelev V.N.

Dates

2000-05-27—Published

1998-11-23—Filed

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