FIELD: oil producing industry.
SUBSTANCE: according to proposed method, the following devices are mounted on tubing string from bottom to top: intake funnel with liner, packer and jet pump. This assembly is lowered on tubing string into well. Intake funnel is arranged not lower than top of formation perforation zone, and then complex logging instrument is lowered into well through channel of jet pump housing. In process of lowering, background geophysical parameters are recorded. Then complex logging instrument is taken out of well and blocking insert with through channel is installed in through channel of jet pump, and tubing string is lowered until intake funnel reaches sole of formation perforation interval. Then chemical agents are pumped into well, and after filling of well with chemical agents, tubing string is partially lifted, packer is released and designed amount of chemical agents are pumped into formation after which blocking insert is taken out and complex logging instrument and sealing unit are lowered into well. Records of geophysical parameters from funnel to well bottom hole are taken, complex logging instrument is installed at funnel inlet, and sealing unit is installed on seat in through channel of jet pump and, using jet pump, at least two cycles of hydrodynamic action onto formation at depression-repression mode are carried out with provision of circulation of chemical agents in formation after which draining of formation is started by removing of reaction products, and before termination of formation draining, records of physical fields of formation along well borehole, with jet pump operating, are taken, then complex logging instrument and sealing unit are taken out, insert for recording pressure-build-up curves with check valve is installed in through channel of jet pump. Said insert is provided with self-contained pressure gauge installed from below. Designed value of depression on formation is built, and draining of formation is carried out with measuring of amount of taken out formation fluid. Then delivery of working agent to nozzle of jet pump is stopped, and overpacker and underpacker spaces are separated by means of check valve of insert for recording pressure-build-up curves. Then using self-contained pressure gauge, pressure-build-up curve in underpacker space is recorded, insert is taken out together with self-contained pressure gauge and operations for setting well is service are carried out.
EFFECT: improved reliability and increased capacity at acid formation treatment.
3 dwg
