METHOD OF OPERATION OF WELL JET PUMPING UNIT IN FORMATION PERFORATION

摘要

FIELD: well jet pumping units for oil recovery. SUBSTANCE: method includes installation of blocking insert with through bypass channel into jet pump passage channel; injection of chemical reagents to zone of well producing formation through tubing and bypass channel of blocking insert; setting of packer; withdrawal of blocking insert; lowering into well of perforator on logging cable and sealing unit located above perforator; perforation of producing formation under repressing by well fluid column, with perforator installed within interval of producing formation accurate to ±0,2m; forcing into formation of chemical reagent penetrating into formation through, at least, four radii of well; formation stimulation by pressure differential-repressuring with periodic supply of working fluid to jet pump nozzle; pumping out by jet pump of reaction products and formation fluids and central measurement of production rate; stimulation of formation by instantaneous cyclic pressure differential- repressuring and repeated measurement of production rate. Pressure differential-repressuring cycles are repeated until attainment of stable production rate; and sealing unit and perforator remnants are withdrawn from well. EFFECT: intensified stimulation of bottomhole formation zone. 2 dwg