DISPERSED GEL-FORMING COMPOSITION FOR DEVELOPMENT OF OIL DEPOSITS BY WATERFLOODING Russian patent published in 2003 - IPC

FIELD: oil producing industry, particularly compositions for development of oil deposits by waterflooding; applicable in increase of oil recovery by shutoff of water inflows to oil wells, elimination of annular space crossflows and for variation of filtering characteristics of nonuniform formations. SUBSTANCE: dispersed gel-forming composition includes powdery filler of plant origin containing additionally 5-20 wt.% of pectin-containing plant raw material, alkali and water, with the following amounts of components, wt. %: said filler 1.0-3.0; alkali 1.5-3.0; the balance, water. EFFECT: provided active, low-cost composition, excluded use of expensive synthetic polymers, characterized by higher sedimentation stability, degree of swelling and residual resistance. 2 tbl, 5 ex