Patent RU-2263236-C1 (RU)
Inventor: KHOMINETS ZINOVIJ DMITRIEVICH
IPC: F04F5/02
Filed: 2004-09-14
Granted: 2005-10-27
Abstract: FIELD: oil producing industry. 
     SUBSTANCE: according to proposed method, intake funnel, liner, packer, two-section with bypass ports in upper section and axial two-step through channel with seat in each section are installed on tubing string.  Said assembly is lowered into well and releasing of packer is carried out.  Complex geophysical instrument is lowered on logging cable.  When lowering complex geophysical instrument, background values of physical fields in well and parameters of well for tying formation perforation internal are measured.  Then complex geophysical instrument is lifted from well, and device for secondary formation tailing-in is lowered on logging cable into well.  Secondary formation tailing-in device includes perforator and gas generator module containing at least two chambers with powder charges.  Ejecting device with replaceable nozzles and diffusers is installed for movement over formation tailing-in device.  Formation tailing-in device is installed opposite to chosen formation interval, and ejecting device is set on seat in upper section of support and, using ejecting device, preset drawdown is created and perforating of formation is carried out.  Then powder charges are kindled and powder gas pressure acts through perforation channels onto formation to form vertical cracks.  Logging cable with remnants of perforator and ejecting device is lifted device is lifted and complex geophysical instrument with ejecting device movably installed over complex geophysical instrument is lowered into well.  Ejecting device is installed in support on seat in upper section, and records of fields is carried out when lowering complex geophysical instrument.  Using ejecting device, draining of well is carried out by delivering working agent to nozzle of ejecting device for 4-10 hours.  When stable depression is attained, well production rate and bottom hole pressure are measured.  With ejecting device operating, records of fields and composition of fluid are taken at moving of complex geophysical instrument.  Delivery of working agent is stopped and logging cable, complex geophysical instrument and ejecting device are taken out.  Blocking insert is installed on seat in upper section of support to close bypass ports of support.  Hydraulic fracturing liquid is pumped into formation through blocking insert, then insert is taken out and complex geophysical instrument with ejecting device is lowered on logging cable into well.  Ejecting device is set on seat in upper section, and records of fields are carried out using complex geophysical instrument.  Complex geophysical instrument is lifted to intake funnel and draining of formation is done by ejecting device until hydraulic fracturing liquid with reaction products and formation medium in amount equal to two-fold volume of hydraulic fracturing liquid pumped into formation is pumped out.  Record of bottom-hole pressure and well production rate are taken periodically.  Samples of media are taken.  With ejecting device operating, records of fields and composition of fluid are taken by complex geophysical instrument.  Higher depression is built on formation and records of fields and composition of formation media along well are taken when lifting complex geophysical instrument.  Then delivery of working agent to nozzle of ejecting device is stopped, and logging cable, complex geophysical instrument and ejecting device are taken out.  Insert with self-contained pressure gauge and sampler are installed on seat in lower section of support, and ejecting device with channel to supply pumped out medium stopped in upper part is installed in upper section of support.  Working agent is supplied to nozzle of ejecting device, draining of well is carried out, and delivery of working agent is stopped and records of pressure build-up curves in underpacker space of well are taken at completion of which ejecting device and insert with self-contained pressure gauge and sampler are taken out and operations for setting well in service are carried out. 
     EFFECT: enlarged operating capabilities, increased capacity of plant. 
     3 cl, 4 dwg