METHOD FOR TREATING DOWN-HOLE ZONE OF OIL BED Russian patent published in 1997 - IPC

Abstract RU 2095560 C1

FIELD: oil production industry. SUBSTANCE: according to method, well is filled with oil. Acid solution is injected under pressure which is close to value of well casing string testing pressure. Injection is performed by portions: injected in first portion is acid solution of high concentration and in small volume, injected in second portion is acid solution of low concentration and in large volume. Final portion is pressure-forced by oil. Then technological delay is undertaken under pressure during 7-10 days for levelling profile of inflow or during not over 30 min for increasing permeability of down-hole zone of well. Development of well is performed by injecting alternating portions of air and oil into annular space. EFFECT: high efficiency. 2 cl

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RU 2 095 560 C1

Authors

Luzjanin G.S.

Tymoshev D.N.

Nikonov N.P.

Prosvirnov Ju.N.

Vas'Kov A.S.

Tarasov V.V.

Shvetsova Z.S.

Prosvirin A.A.

Akhapkin M.Ju.

Kruchik L.U.

Dates

1997-11-10Published

1997-02-18Filed