WELL COMPLETION METHOD Russian patent published in 1999 - IPC

FIELD: oil and gas production industry. SUBSTANCE: method can be used for completion of oil and gas wells after their drilling and overhaul repair. According to method, installed in well is string of pump-compressor pipes, and well liquid is displaced into annular space by injecting gas into string of pump-compressor pipes with annular space at well mouth being open. Annular space is closed at moment when level of well liquid is lowered down to shoe of pump-compressor pipes. Now delivered into string of pump-compressor pipes is portion of solution of surface-active substance, and buffer zone is created of it with continuation of process of gas injection into string of pump-compressor pipes until complete gassing of well liquid in porous space of bottom-hole zone is achieved. Amount of surface-active substance to be injected is determined according to formula. Application of aforesaid method induces inflow of bed fluid from well. This operation is undertaken at minimal depressions upon bed. EFFECT: improved efficiency in completion of well due to fuller gassing of well liquid in bottom-hole zone and ensuring mixing of injected gas with bed fluid of productive bed at larger area of contact. 1 dwg