METHOD FOR DEVELOPMENT OF HIGH-VISCOSITY OIL DEPOSIT WITH WATER-SATURATED ZONES Russian patent published in 2024 - IPC E21B43/22 E21B43/24 

FIELD: oil, gas and coke-chemical industry; mining.

SUBSTANCE: method for development of high-viscosity oil deposit with water-saturated zones includes construction of horizontal production wells and located above injection wells, heating of the formation and conducting surveys to determine water-saturated zones adjacent to the production well. After that, in the casing string adjoining the water-saturated zones of this well, these zones are covered with a water-insulating composition — a heat-resistant gel composition. Further, displacement agent is pumped — steam with temperature of at least 180 °C, into injection well and product extraction from production well. When detecting water-saturated zones, an electric submersible pump (ESP) is lowered on tubing into a production well in parallel with a coiled tubing fixed to the end of the tubing string, where the pear-shaped nozzle is located by means of the release coupling. Further, by increasing the pressure in the coiled tubing, releasing of the coupling that attaches the coiled tubing to the tubing is initiated, and the end of the coiled tubing is lifted. After that, pumping of rated volume of water-insulating composition is started with continuation of coil tubing lifting. After the end of the process pause for the period of gel formation, the injection well is operated in the mode of injection of the displacement agent, and the production well is operated in the mode of product extraction through the ESP.

EFFECT: enabling expansion of functional capabilities of the deposit development method.

1 cl, 3 dwg