FIELD: oil industry.
SUBSTANCE: method includes drilling vertical extracting and forcing wells, extracting oil through product wells, forcing of working agent through force wells. Low-penetrable deposit areas are detected. Horizontal shafts are drilled into low-penetrable deposit areas under decreased pressure in well by washing rock under high pressure from fluid with forming of thin long channels. Working agent is forced into low-penetrable zones through side horizontal shafts with forcing of oil into high-penetrable zones. Pressure in well is decreased when drilling side shafts for 5÷10% of hydrostatic pressure. Rocks are washed away under pressure of 15÷20 MPa through flexible pipe, which is fed through cut side window. During time of driving of side shaft washing fluid should not fill all of well and equalize pressure in well.
EFFECT: higher oil yield.
1 ex
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