| 摘要 |
FIELD: oil producing industry. SUBSTANCE: according to proposed method, stem, packer and jet pump installed on tubing string are lowered into well. Packer and jet pump are installed over top of payout bed and releasing of packer is done. Working agent is periodically fed into nozzle of jet pump by means of pumping set. Jet pump operates as follows: first working agent is sharply delivered into nozzle of jet pump at preset pressure of pumping set and required depression of payout bed is created in several seconds. Said depression is maintained during 2 to 20 min by constantly delivering working agent into nozzle of jet pump at preset pressure of pumping set and then hydrostatic pressure of liquid column in well is restored abruptly owing to liquid crossflow into underpacker space and hydraulic shock is generated directed to payout bed side, and particles of coltamont are teared off owing to sharply cutting of delivery of working agent into nozzle of jet pump. Pressure of liquid column is set to exceed formation pressure. Time of action of hydrostatic liquid column onto bottom hole zone is set two-fold less than depression time. Then working agent is sharply fed into nozzle of jet pump and cycle described above is repeated. Number of cycles "depression + restoration of hydrostatic pressure" is determined by degree of restoration of permeability of bottom hole zone of bed by carrying out checks of well production rate before and in process of cyclic action onto bottom hole zone. If output of well remains constant during last two checks, work is stopped. EFFECT: improved reliability and increased output of well. 5 cl, 1 dwg |
