METHOD FOR DEVELOPING RESERVOIR OF SUPER-VISCOUS OIL BY HEAT METHODS IN LATE STAGE Russian patent published in 2018 - IPC E21B43/24 E21B36/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil industry, and in particular to the development of deposits of ultra-viscous oil using heat to heat up the productive formation. Method of developing deposits of super-viscous oil by thermal methods at a late stage of development, including the injection of steam into injection wells, heating the reservoir with the creation of a steam chamber, the selection of oil through the production wells, at a late stage of development, stopping the injection of steam, determining the parameters of the steam chamber, injecting hot water into the reservoir and product selection, characterized in that a pair of wells with thermobaric conditions in the upper injection well is selected below the vaporization temperature in reservoir conditions, with a reduction in oil production rate of up to 1–3 tons/day, then the injection of steam into the upper well is stopped, the lower well is transferred under the injection of water of 30–80 m³/day with a temperature of 40–65 °C, and the top one is run under the selection of formation products.

EFFECT: proposed method for the development of deposits of super-viscous oil by thermal methods at a late stage of development allows to significantly increase the efficiency of thermal exposure with the maximum possible recovery of residual oil from the interborehole zone, and also reduce material and economic costs due to the lack of gas injection.

1 cl, 1 dwg