DEVELOPMENT METHOD OF HIGH VISCOUS OIL OR BITUMEN DEPOSIT Russian patent published in 2019 - IPC E21B43/24 E21B43/22 E21B7/04 E21B47/06 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil-producing industry. Method for development of high-viscosity oil or bitumen deposit includes determination of oil-saturated thickness of formation, formation permeability, initial formation pressure and temperature, construction of horizontal production well and at least two vertical injection wells located above horizontal production well on one plane above horizontal production well borehole by 5–10 m along grid with distance from 50 to 200 m from each other. Vertical injection wells are cut in the vertical wells. Vertical injection wells are perforated throughout the interval of the productive formation ensuring pumping of the working agent towards each other. Equipping a horizontal production well and vertical injection wells with devices for monitoring temperature and pressure in the well and formation. Working agent used is two aqueous solutions of substances that form a binary mixture with mixing of energy when mixing with each other in the mixing region. Water solutions are pumped simultaneously into alternating vertical injection wells for 2–12 h with uniform flows. Temperature and pressure in horizontal production and vertical injection wells are monitored, displacement of the mixing area from the barrel of one vertical injection well to the barrel is controlled by another change in injection pressure.

EFFECT: increase of oil recovery factor both at early stage of development, and at developed deposits due to increase of efficiency of thermal impact on formation with simultaneous reduction of material costs and saving of energy resources, expansion of technological methods of thermal effect on productive formation.

1 cl, 2 dwg, 1 ex