FIELD: oil producing industry; oil-well testing and completing facilities.
SUBSTANCE: according to proposed method the following devices are lowered into oil well, being installed on tubing string in series from bottom to top: erosion perforator, linear with intake funnel, packer and jet pump with stepped through channel. Erosion perforator is installed in oil producing formation interval. Blocking insert with axial through channel is installed in stepped through channel of jet pump, thus separating inner space of tubing string from oil well annulus. Mixture of liquid medium with finely dispersed abrasive material is pressure fed into erosion perforator and by acting onto walls of well with jets of said mixture, vertical slot perforation channels are made in bottom hole formation zone. Erosion perforator is disconnected from linear with intake funnel is dropped to bottom, intake funnel of linear is installed over top of formation, packer is released, blocking insert is taken out and complex geophysical instrument is lowered through tubing string on logging cable passed through sealing unit for axial displacement relative to unit into zone of producing formation. Sealing unit is installed in stepped through channel of jet pump, thus separating inner space of tubing string. In process of lowering of complex geophysical instrument, recording of background values of geophysical parameters of oil well and producing formation is carried out by means of complex geophysical instrument. By delivering working medium through tubing string annulus into jet pump nozzle, at least one drawdown is built, and well production rate is determined at each drawdown, after which profile of influx from producing formation at different values of drawdown is recorded by means of geophysical instrument, said instrument with sealing unit is lifted to surface, and blocking insert with axial through channel is fitted in stepped through channel of jet pump, thus separating inner space of tubing string from oil well annulus. Packer is set and intake funnel of liner is installed at level of sole of perforated interval of producing formation, and hydraulic fracturing liquid with chemical reagents and propant is pumped into tubing string to top of perforated interval. Then packer is released again and hydraulic fracturing is pumped into producing formation, thus forming vertical cracks in formation. Blocking insert is taken out of stepped through channel and differential pressure insert is fitted in stepped through channel with self-contained geophysical instrument, working medium is delivered through tubing string annulus into nozzle of jet pump and drawndown is built on producing formation with pumping out of reaction products and hydraulic fracturing liquid with movable part of propant along tubing string to surface. Then pressure differential insert is taken out, packer is set and tubing string is lifted to level of intake funnel of liner over producing formation top and packer is released again. Complex geophysical instrument with sealing unit is lowered o logging cable along tubing string, sealing unit is installed in stepped through channel of jet pump, and complex geophysical instrument is installed at outlet of intake funnel. Working medium is fed into jet pump nozzle and, using said pump, number of drawdowns is built and well production rate is recorded at each drawdown, and then influx profile is recorded at each value of drawdown moving complex geophysical instrument along producing formation, then delivery of working liquid into jet pump is cut off and complex geophysical instrument with sealing unit is lifted to surface, after which operations are carried out to set well in operation.
EFFECT: enlarged operating capabilities of unit, improved efficiency of testes and bottom hole treatment.
3 dwg
