METHOD OF DEVELOPMENT OF OIL AND GAS CONDENSATE DEPOSIT Russian patent published in 2016 - IPC E21B43/16 E21B43/32 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry and can be used in development of oil and gas condensate deposits. Method involves drilling the oil part in the under-gas-cap zone using horizontal wells. First, the first open borehole is drilled at the boundary of the gas-oil contact in location and length corresponding to the main production barrel. Water is pumped in to form a water screen able to interact with the gas cap to form methane hydrates. First borehole is eliminated after the water injection is over by placing a cement plug. Further drilling of the main borehole of the production well is performed under the first borehole closer to the bottom of the deposit or to the oil-water contact. Well is operated with a downhole pressure corresponding to the minimum pressure of the hydrate formation area at a specified formation temperature until the necessity of pressure reduction below the pressure of dehydration occurs.

EFFECT: increasing oil recovery of deposits due to prolongation of service life of oil wells in under-gas-cap zones.

1 cl, 2 dwg