GEL-FORMING COMPOSITION FOR CONTROL OF FORMATION PERMEABILITY Russian patent published in 2002 - IPC

FIELD: oil producing industry, particularly, compositions for performance of water shutoff operations. SUBSTANCE: offered gel-forming composition may be used in control of filtration flows of oil formations. Limiting of water inflows in oil and gas wells, elimination of overflows of water and gas, disconnection of separate inundated intervals of formation, equalization of absorption profile in injection wells in major repairs of well. Gel-forming composition includes aluminosilicate, inorganic acid and water. Aluminosilicate is used in form of rejected zeolite catalysts in production of zeolite catalysts. Acid is used in form of hydrochloric acid or used sulfuric acid with the following amounts of components, wt.%: rejected in production process zeolite catalysts 3- 8; hydrochloric acid or used sulfuric acid 6-12; the balance, water. EFFECT: higher efficiency of composition by regulation of time of gel formation, viscosity, increased structure strength, solution of ecological problem- utilization of wastes of petrochemical production process, transition from inorganic composition to ecological clean inorganic compositions. 4 cl, 2 ex