FIELD: oil producing industry; pumping facilities.
SUBSTANCE: according to proposed method, jet pump with stepped passage channel in its housing and packer of pump with thorough passage channel and stem with inlet funnel are lowered into well on tubing string. Releasing of packer is carried out with packer installed higher than producing formation. Locking insert with central through channel is installed in stepped through channel and hydraulic fracturing fluid is pumped into producing formation. Then locking insert is lifted to surface and flexible pipe is lowered into well through tubing string passing it through sealing unit with possibility of displacement relative to sealing unit. Lower end of flexible pipe is set lower than or at level of lower perforated zone of producing formation. In process of lowering, sealing unit is installed in through channel of jet pump. Liquid working medium is fed into nozzle of jet pump along well annulus, and draining of producing formation is carried out by creating depression in under-packer space of well. Washing fluid for washing well bottom is delivered into well simultaneously or after building of stable depression on producing formation, and ratio between value of pressure in flexible pipe and pressure of liquid medium in medium in well annulus is maintained less or equal to 0.98. After pumping out of fluid from producing formation in amount equal to not less than two amounts on hydraulic fracturing fluid pumped into producing formation, delivery of washing fluid into flexible pipe is stopped. Then not earlier than in 5 min, delivery of working fluid into nozzle of jet pump is stopped, flexible pipe with sealing unit are taken out of well and, using jet pump investigation of producing formation for estimation its productivity is done. The well is put into service.
EFFECT: intensification of investigation, testing and preparation of well for operation with increased reliability of data stating readiness of well for operation under working conditions.
2 dwg
