METHOD FOR DEVELOPMENT OF HIGH-VISCOSITY OIL DEPOSIT Russian patent published in 2016 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: invention can be used in the development of deposits of heavy oil. A method of high-viscosity oil field development involves drilling vertical and inclined horizontal injection wells, injection of working agent through the injection wells and selection of oil through production wells. Vertical wells drilled at a distance of 1-10 m from the face inclined horizontal wells. Vertical well is perforated from the top layer to the level of 1-2 meters above the water contact OWC. For separation of the perforation interval vertical well bore at two intervals in the vertical wellbore packer is set in the range below the top layer of 4 m and up to 5 m OWC. In vertical wells installed is equipment that allows to regulate the injection of steam at each interval of a vertical well. Trunnion well is equipped with temperature sensors. In the initial period of inclined horizontal well and vertical well steam injection is performed to create a hydrodynamic connection between wells and warming their bottom zones. After warming face zones obliquely horizontal well transferred by extraction, and the vertical well is converted to injection. According to the testimony of temperature sensors determine the interval break of steam. A break of steam close to the bottom of the trunnion hole injection is stopped in the lower range of vertical well, with a couple of breakthrough closer to the point of entry into the reservoir inclined horizontal wells stop pumping into the upper range of vertical well. After aligning the temperature readings in pan horizontal well injection intervals in the vertical well is resumed. Vary the amount of coolant in the vertical injection well and the selection of the liquid from the slope of a horizontal well to reduce the rate of steam breakthrough in pan horizontal well and resize the steam chamber.

EFFECT: enhanced oil recovery, reduced water production, the decrease in displacement agent injection, pressure maintenance, lack of lowering the temperature of formation fluid, heated by pumping the coolant in the production well bore, which facilitates its ascent to the surface.

1 cl, 1 ex, 1 dwg