FIELD: oil-and-gas industry.
SUBSTANCE: proposed method comprises drilling crossing and communicating vertical and main horizontal wells. Another main horizontal well is connected to vertical well opposite the main horizontal well. Several extra horizontal wells are connected to vertical and main horizontal wells. Then, similar elements are created at the pool. Note here that extra horizontal wells of element are located between extra horizontal wells of adjacent elements. Initially, said elements are operated as injection-extraction wells with injection of working agent, holding and extracting the product prior to draining of hole-bottom zone. Then, adjacent elements are operated in turns as injection and operating ones till pool exhaustion or, without draining adjacent elements are operated as injection and extraction.
EFFECT: higher pool oil recovery and efficiency of operation.
4 cl, 1 ex, 2 dwg
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