FIELD: oil industry.
SUBSTANCE: method includes drilling of vertical extracting and force wells, extraction of oil through product wells, forcing of working agent through force wells. Low-penetrable deposit areas are detected. Side horizontal shafts are drilled into low-penetrable deposit zones at decreased pressure in well by washing rock under high pressure of fluid with forming of thin and long channels. Washing of rock at end stage is performed using solution of hydrochloric acid. Working agent is forced into low-penetrable zones through side horizontal shafts with forcing of oil to highly penetrable zones. Horizontal shafts are driven under pressure in well for 5-10% lower than hydrostatic and through cut side port in casing column with use of flexible pipe. Washing fluid is fed under pressure 15÷20 MPa.
EFFECT: higher oil yield.
1 ex
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