METHOD FOR DEVELOPMENT OF SUPERVISCOUS 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 superviscous oil deposit. Method for development of superviscous oil deposit using paired horizontal wells includes construction in productive formation of horizontal injection and production wells, injection of steam into both wells for heating of productive formation and creation of steam chamber, transfer of production well into production extraction mode. In 4–7 years after the beginning of well operation, with increase in water cut of the productive formation by 5–10% and increase in temperature of the extracted product by more than 120 °C, solvent is pumped. Volume of the solvent for pumping into the steam chamber based on laboratory studies is 15% of the volume of the steam chamber. At the same time with combined injection of solvent and steam into the injection well, the extraction of the produced product from the production well is reduced from the initial production volume to the minimum volume. After completion of injection of the entire volume of the solvent, injection of only steam is continued for 10 days with a minimum volume of extraction of the production product from the production well. After 10 days, extraction of the initial volume of the produced product from the production well is resumed.

EFFECT: higher efficiency of oil recovery.

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