FIELD: oil production industry, particularly to develop oil wells, to isolate formation during water-bearing oil deposit development.
SUBSTANCE: oil production composition comprises gypsum containing material and hydrocarbon liquid taken in the proportion of 1:1-2.5. The composition is treated with solution of hydrochloric or sulfuric acid taken with ratio of 1:1-5 correspondingly. Oil-water emulsion or crude oil may be used as the hydrocarbon liquid. Semihydrate gypsum, high-strength gypsum, phosphogypsum or dry plaster may be utilized as the gypsum containing material. The composition may additionally have setting retarder, namely bone glue taken in amount of 0.015-0.3 parts by weight.
EFFECT: increased oil output, improved cementing properties along with water influx limiting, optimization of setting time regardless of formation water pH level and reduced cost of grouting composition.
8 cl, 3 tbl
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