METHOD OF DEVELOPMENT OF OIL-GAS-CONDENSATE DEPOSITS Russian patent published in 1997 - IPC

FIELD: oil and gas producing industry. SUBSTANCE: drilled in ring-shaped manner over periphery of oil-bearing pool is a row of deep bypass wells opening the zone of superhydrostatic pressures. Formed with the help of combined operation of bypass wells is thermal gas-water billow moving to depression zone, i.e., to developed pool. When oil and then, also gas-condensate mixture are with drawn from development wells, the total volume of producing pool is reduced. But owing to continued regulated bypass of waters from zone of super hydrostatic pressure and maintenance of thermal gas-water billow, reservoir freed from hydrocarbons is constantly replenished with gas-water mixture. This compensates the pressure depression and intensifies motion of hydrocarbon fluids to development wells. EFFECT: higher degree of recovery of hydrocarbons from oil-gas-condensate deposit, particular, in the presence of permafrost rocks and arid (waterless) zones. 2 dwg