FIELD: engines and pumps.
SUBSTANCE: liner and inlet bowl, packer and ejector case, arranged sequentially from bottom to top, are downed in tubing (OWT) on flexible tubing (FT), FT packer being arranged above OWT packer and inlet bowl being arranged above pay top bed. FT packer is removed, acid solution is pumped in pay via FT and aforesaid casing. Then hydrodynamic ejector device with self-contained pressure gage arranged there below is mounted, via FT, in aforesaid housing, and, on forcing fluid, e.g. oil in annular space between FT outer surface and OWT inner surface and into hydrodynamic ejector device nozzle, depression on the pay is created to drain products of reaction between acid solution with the bed from its well zone. Reaction products pumped out from the pay, fluid feed into aforesaid aerodynamic ejector nozzle is abruptly cut off. Note here that hydrodynamic ejector check valve arranged in pumped fluid feed channel cuts off automatically to allow registration of bed tail pressure recovery curve (PRC). PRC registered, cables are used to move aforesaid ejector with self-contained pressure gage to the surface and log cable is used to lower via FT the complex logging geophysical instrument with geophysical ejector arranged there above on said log cable into the well. In lowering, said complex geophysical instrument is used to register background geophysical parametres, e.g. pressure and temperature along wellbore from FT bowl to well bottom hole. Note here that said geophysical ejector is mounted in supporting case. Then on forcing fluid, e.g. oil in annular space between FT outer surface and OWT inner surface and into hydrodynamic ejector device nozzle, depression on the pay is created to drain products of reaction between acid solution with the bed to fluid flow stabilisation. Now, with geophysical ejector operating, aforesaid complex geophysical instrument is lifted by log cable from bottom hole to FT inlet bowl to register well geophysical parametres. Then operation of geophysical ejector is terminated to remove complex geophysical instrument from the well and hydrodynamic ejector with self-contained pressure gage is dropped down into FT and mounted in supporting case. Then hydrodynamic ejector device with self-contained pressure gage arranged there below is mounted, via FT, in aforesaid housing, and, on forcing fluid, e.g. oil in annular space between FT outer surface and OWT inner surface and into hydrodynamic ejector device nozzle, depression on the pay is created to discharge oil via pumped fluid feed channel, gap between nozzle edge and mixing chamber edge, mixing chamber and hydrodynamic ejector diffuser into FT and further on and with natural gas, to come onto the surface by means of ejector gas lift. Formation fluid of extracted and, after drop in production rate, natural gas is replaced by oil or condensate, to abruptly stop feeding working fluid into hydrodynamic ejector nozzle and to register PRC in parker tail. Then cables are used to withdraw hydrodynamic ejector with self-contained pressure gage onto the surface and log cable is used to lower complex logging instrument with geophysical ejector arranged there above to analyse well section from inlet bowl to bottom hole with operating geophysical ejector to and register well stream profiles and define sources of flooding. Then fluid working fluid is replaced with natural gas, natural gas feed into geophysical ejector nozzle is terminated, complex logging instrument with geophysical ejector is withdrawn for well productivity recovery measures to be taken via FT and aforesaid supporting case: water-shut-off jobs, bed reperforating in depression conditions with the help of miniature perforators down on log cable or bed acid treatment, followed by above described hydrodynamic and geophysical analyses. Now, well operation is resumed by means of ejection gas-lift.
EFFECT: expanded performances.
