FIELD: gas and oil production.
SUBSTANCE: method involves perforation interval locking by locking composition and a portion of choking fluid feed. Additional portion of choking fluid is injected through pump compressor pipe string to wellhead before feeding locking composition. Perforation interval zone overlapping is implemented at wellhead height of minimum 110% of perforation interval length. Volume of choking fluid portions are calculated so as the height of choking fluid portion column against surface of locking composition in pump compressor pipe string is equal to the height of additional choking fluid portion column against surface of locking composition in annular space. When pressures in pump compressor pipe string and in annular space are equal, gas is extracted from annular space together with gas extracted by displacement in pump compressor pipe string.
EFFECT: extended functional possibilities of the method, reliable locking insulation screen in perforation interval zone in a well with abnormally low bed pressure.
2 dwg
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