DEVELOPMENT METHOD OF OIL DEPOSIT LOCATED ABOVE GAS DEPOSIT AND SEPARATED FROM IT WITH NON-PERMEABLE INTERLAYER Russian patent published in 2013 - IPC E21B43/16 

FIELD: oil and gas industry.

SUBSTANCE: according to the proposed method, oil deposit located above gas deposit and separated from it with a non-permeable interlayer is developed. 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 is performed. According to the invention, an additional horizontal well is drilled with passage of its horizontal shaft in a non-permeable interlayer between oil and gas deposits. Hydraulic fracturing is performed in horizontal part of the well shaft at the interval of non-permeable section with formation of hydraulic fracturing cracks connecting oil and gas deposits to each other. During development of oil deposit, when gas penetrates into shafts of production wells, periodic pumping of viscous liquid is performed to the additional horizontal well till the gas flow to shafts of those production wells is stopped.

EFFECT: improving effectiveness of the method owing to using gas of gas deposit as working fluid.

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