Way to develop oil deposits located above the gas reservoir and separated from it by an impermeable interlayers

摘要

FIELD: oil and gas industry.;SUBSTANCE: method involves drilling of vertical and horizontal production and injection wells in oil deposit, pumping of working fluid to injection wells and extraction of products from production wells. Drilling of an additional horizontal well in gas deposit is performed; then, branches directed upwards through a non-permeable interlayer with outlet of branches to oil deposit are drilled out of it. Water is pumped from the head to the additional horizontal well so that gas-water mixture is formed in the same well. At gas leakage to shafts of production wells, product extraction from the same wells is reduced by 40-50% till bottomhole pressure in them is recovered. After that, product extraction from the same wells in previous volume is continued.;EFFECT: increasing oil extraction coefficient.;1 dwg