METHOD FOR ISOLATION OF PERMEABLE BED CREATED BY TERRIGENOUS AND CARBONACEOUS ROCK MATERIALS Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: this can be also used in isolation of absorbing beds during drilling of bore-holes. According to method, successively injected into bed is alumochloride with concentration of 15-25 mass%, then high-module sodium silicate with silicate module of 4.5 and higher. Proportion of alumochloride and high-module sodium silicate in mass parts is 1:(0.5-2). In another version, method for isolation of permeable bed created by terrigenous and carbonaceous rock materials implies injection into bed of alumochloride with concentration of 15-25 mass% and high-module sodium silicate with silicate module of 4.5 and higher with concentration of 3.5-15 mass% (as to SiO2). Proportion of high-module sodium silicate and alumochloride in mass parts is 1:(1-6). These components are injected simultaneously. Application of aforesaid method allows for reduction of reagents as much as by 2 to 12 times with retention of isolation efficiency. EFFECT: high efficiency. 4 cl, 2 tbl