FIELD: borehole jet plants, particularly for gas production.
SUBSTANCE: method involves mounting inlet funnel, packer and jet pump having body with inlet channels for gaseous medium and medium to be pumped, as well as through-pass channel with seat arranged between stages; lowering above assembly into well so that inlet funnel is arranged above perforation roof of productive formation; removing packer; lowering well-logging device suspended to borehole cable in productive formation zone through through-pass channel, wherein the well-logging device is lowered along with sealing unit preliminary connected to borehole cable; installing sealing unit on seat in through-pass channel of jet pump so that borehole cable may reciprocate through the sealing unit; recording geophysical parameters of production formation within interval defined between inlet funnel and well bottom; creating differential pressure drawdown by supplying high-pressure gaseous medium in active nozzle through hole annuity; draining well within 4-10 hours along with liquid medium pumping out from the well bottom; recording geophysical parameters within interval defined by well bottom and inlet funnel when jet pump is in its working state; lifting well-logging device and borehole cable from the well; lowering rock drill or device, which applies acoustic action on the formation, connected to borehole cable into production formation interval and secondarily penetrating in the formation or cleaning well bore zone by applying acoustic action in drawdown mode or by providing hydraulic action on formation in which drawdown is alternated with overbalance when jet pump is in its working state; removing rock drill or device which applies acoustic action on the formation along with removing borehole cable and installing insert for recording change of formation pressure buildup having independent manometer and channel for medium to be produced from the well, wherein the channel is provided with check valve; creating differential pressure drawdown by supplying gaseous medium into active nozzle of jet pump; stopping gaseous medium supply into the active nozzle after formation drainage termination to separate well spaces above and under the packer by closing check valve of the insert; recording change of formation pressure buildup in well space under the packer by manometer; removing the insert and manometer from the well; isolating pipe string interior from hole annuity by installing blocking insert with through-pass channel in through-pass channel and bringing the well into flush operation mode through jet pump. The described method is used in the case of well yield reduction.
EFFECT: increased operational reliability and output from gas-condensate wells.
