METHOD FOR DEVELOPMENT OF HIGH-VISCOSITY OIL DEPOSIT USING PAIRED HORIZONTAL WELLS Russian patent published in 2024 - IPC E21B43/22 E21B43/24 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry and can be used in development of high-viscosity and bitumen oil deposits using paired horizontal wells. Method for development of high-viscosity oil deposit using paired horizontal wells includes steam injection into formation through paired horizontal injection and production wells for formation heating with creation of steam chamber, transfer of horizontal production wells to production extraction mode by electric centrifugal pump and further steam injection through horizontal injection wells. Additionally, injection of hydrocarbon solvent together with steam is initiated into horizontal injection wells, at temperature in the steam chamber not less than the phase transition temperature of the mixture of steam and hydrocarbon solvent while maintaining temperature in the steam chamber not lower than the phase transition temperature of the mixture of steam and hydrocarbon solvent. Pumping is performed alternately in staggered order – through one well, with stoppage of steam injection to adjacent horizontal injection wells and reduction of extraction in paired horizontal production wells by at least 2 times.

EFFECT: higher efficiency of development of high-viscosity oil deposit.

1 cl, 1 dwg