METHOD FOR INTENSIFICATION OF OIL AND GAS PRODUCTION BY HYDRAULIC FRACTURING OF PRODUCING OIL-GAS-BEARING FORMATION Russian patent published in 1996 - IPC

FIELD: oil and gas producing industry, particular, methods for intensification of oil and gas production by hydraulic fracturing of formation with use of explosives. SUBSTANCE: method for intensification of oil and gas production by hydraulic of producing oil-gas-bearing formation includes lowering of charge of explosive to the zone of well producing formation with product filter. Then, explosive charge is placed to working position. Rocks of producing formation are acted upon by fluid and gas jets through perforated channels. Additional charge of explosive is lowered on cable or wire rope simultaneously with the main charge of explosive. Additional explosive charge is located on a cable of wire rope at a distance of 1.5-12 m from the main charge. Additional explosive charge is placed to working position simultaneously with the main explosive charge. This is effected by blasting or firing of explosive charges. Fluid in the well between the charges is compressed at pressure value exceeding multiply the rock pressure. Effect of fluid and gas jets is attached under conditions of breakage of producing formation rocks. EFFECT: higher efficiency of formation hydraulic fracturing, reduced consumption of explosive materials, cut down costs of work, decreased effect of shock wave on the bond of cement stone with rock, and higher oil recovery. 2 cl, 3 dwg