WELL KILLING METHOD Russian patent published in 1995 - IPC

Abstract RU 2047745 C1

FIELD: oil producing industry. SUBSTANCE: method for killing wells to be repaired involves injection of displacement fluid into the bottom-hole formation zone followed by injection of blocking and killing fluids. The displacement fluid may be aqueous solution of anionogenic surfactant based on alkylbenzene sulfonates sulfonols and aqueous solution of non- ionogenic surfactant ethoxy alkylphenols neonols. The water-hydrocarbon emulsion is Dicin (petroleum product). The blocking fluid contains (% mass) crude oil 10-20, emulsifier 2-5, stabilizing agent 0.05-0.10, and some salt solution the rest. EFFECT: higher efficiency. 2 cl, 1 tbl

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RU 2 047 745 C1

Authors

Kanzafarov F.Ja.

Balykov N.T.

Kanzafarova S.G.

Dates

1995-11-10Published

1992-01-27Filed