FIELD: oil producing industry.
SUBSTANCE: invention relates to oil producing well pumping plants. According to proposed method packer and jet pump are mounted on tubing string from bottom to top. Jet pumps housing is provided with channel to deliver active medium, channel to deliver pumped out medium and stepped through channel with seat between stages. Said assembly is lowered on tubing string into well. Jet pump is arranged higher than top of formation. Then packer is released and insert is lowered into well on tubing string and installed on seat in housing of jet pump to record formation pressure build-up curved in underpacker space with self-contained pressure gauge and/or pressure transmitter connected with recorder on surface by means of logging cable. Draining of formation is carried out by delivering liquid medium under pressure into active nozzle of jet pump at step-by-step building of at least three successively rising values of depression of formation recording at each step bottom hole pressure, well production rate, content and physical parameters of fluid getting from formation, and then formation is subjected to hydrodynamic cyclic action to clean prewell from colmating particles by creating at least five depression+repressing cycles. Depression is created by delivering active medium into nozzle of jet pump, and repressing is done at stopping of jet pump and opening of bypass valve in insert for recording formation pressure build-up curves, after which medium recovered from well is pumped out once more with step-by-step building of at least three successively rising depressions of formation and after last maximum depression delivery of liquid medium into jet pump nozzle is sharply cut off and, using pressure transmitter, formation pressure build-up curve in well underpacker space is recorded. Cycle described above is carried out until well production rate after last cycle of hydrodynamic test reaches designed values.
EFFECT: improved quality of formation tests, increased well production rate at hydrodynamic tests.
4 cl, 2 dwg
