METHOD FOR MINING-WELL EXTRACTION SCAVENGER OIL AND PROCESS EQUIPMENT SYSTEM THEREFOR Russian patent published in 2016 - IPC E21B43/00 E21B43/24 E21B43/40 E21D8/00 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to fuel and energy industry and can be used for production of high-viscosity scavenger oil. According to method after mine opening of oil deposit and preparation of mining-producing well units, system of force-stimulating reservoir recovery wells is formed by drilling at formation from underground mine-preparatory workings. Production wells are drilled from day surface or directly from ore mining and development workings extraction with common or branched horizontal sections of well shaft. From associated oil gas at oil separation methane is extracted, which is used for generation of electric energy at gas-turbine power plant. Propane-butane component of associated petroleum gas is liquefied under underground conditions and used as displacement working agent pumped into formation through force-stimulating wells. Work on scavenger oil production is carried out with supply to productive formation through a system of force-stimulating wells as displacement working medium of liquefied broad fraction of light hydrocarbons. Said fraction is obtained by separation of associated petroleum gas and/or heat action on formation with circulation loop of heat-bearing fluid with tubular heat exchangers installed in force-stimulating wells.

EFFECT: simplified process of operation and structure of underground equipment, increasing reservoir recovery, reduced cost of well drilling.

2 cl, 5 ex, 9 dwg