METHOD FOR HYDRAULIC FRACTURING OF OIL BED Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: according to method, injected into oil bed under bed fracturing pressure is polyemulsion containing substance which reduces leakage of fluid. After that, injected is polyemulsion with propane, and propane is pressure-forced downwards. Used in function of material which reduces leakage of fluid is powder of lignosulfonates of alkali metals in the form of waste from cellulose-and-pulp production industry in amount of 0.5 to 10 kg/cu.m of polyemulsion. Powder of lignosulfonates of alkali metals is injected together with first portion of polyemulsion with volume of 5-20 cu.m. Mixing of powder of lignosulfonates of alkali metals with polyemulsion is carried out in flow of polyemulsion during its injection into well. Used in function of polyemulsion is such polyemulsion which includes following components, mas.%: water, 10-30; surface-active substance, 0.3-3.0; water-soluble polymer, 0.01-0.3; hydrocarbon phase, the balance. Application of aforesaid method ensures reduction of fluid leakage and due to that increasing dimensions of bed fracturing cracks, that is enhancing efficiency of hydraulic fracturing of oil bed. EFFECT: higher efficiency. 2 tbl