SUPERVISCOUS OIL DEPOSIT DEVELOPMENT METHOD Russian patent published in 2024 - IPC E21B43/24 E21B43/30 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry, in particular to development of deposits of high-viscosity oil or bitumen. Method of development of superviscous oil deposit includes drilling of rows of wells with parallel shafts in horizontal plane, pumping of heat carrier and extraction of oil. Wells are drilled in two rows, lower row of wells is drilled with distance between wells of 75–85 m and with location in deposit at 2 m above formation bottom, wells of upper row are drilled at distance of 3–5 m vertically from lower row of wells. Distance between adjacent wells of the lower and upper rows along the horizontal line is 35–45 m. Further, from the main boreholes of the upper row there are additionally drilled from three to four side horizontal bores in the direction of adjacent boreholes with possibility of their arrangement above the boreholes of the lower row. After that, performing initial heating of all drilled wells by injection of heat carrier for 2 months, wherein in the lower row wells – in amount of 50–60 t/day, in the upper row wells – in amount of 90–120 t/day. After heating, all wells are stopped for thermocapillary impregnation for 20 days. Then, pumping of heat carrier into wells of upper row is resumed in volume of 150–180 t/day, and wells of lower row are started for oil withdrawal.

EFFECT: increasing the efficiency of developing deposits of super-viscous oil or bitumen, increasing the rate of production of reserves.

1 cl, 2 dwg