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2 013 530

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C1

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IPC

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Application

5007890/03, 1991-09-03

(22)

Actual filing date

1991-09-03

(45)

Published

1994-05-30

(72)

Inventor

Pozdeev O.V.Glushchenko V.N.Grigor'Ev A.A.Matjashov S.V.Opalev V.A.

(73)

Holder

Permskij Gosudarstvennyj Nauchno-Issledovatel'Skij I Proektnyj Institut Neftjanoj Promyshlennosti

COMPOSITION FOR ACID TREATMENT OF BOTTOM-HOLE REGION Russian patent published in 1994 - IPC

Abstract RU 2013530 C1

FIELD: oil producing industry. SUBSTANCE: composition contains (in % by mass): technical-grade lignosulfonates 10- 30; or water soluble aliphatic alcohols, or glycols or glycerin 10-15; and 15-18% solution of hydrochloric acid - the balance. Owing to its components, the composition has improved properties because of reduced reaction velocity with carbonates and reduced filtration of spent solution into the formation, and its stabilizing properties in respect to ferric iron. EFFECT: improved properties. 2 tbl

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RU 2 013 530 C1

Authors

Pozdeev O.V.

Glushchenko V.N.

Grigor'Ev A.A.

Matjashov S.V.

Opalev V.A.

Dates

1994-05-30—Published

1991-09-03—Filed

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