METHOD FOR DEVELOPING HETEROGENOUS ULTRAVISCOUS OIL RESERVOIR Russian patent published in 2021 - IPC E21B43/24 E21B43/26 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry and can be used in the development of deposits of high-viscosity and bituminous oil in a heterogeneous reservoir. A method for developing a heterogeneous super-viscous oil reservoir, including drilling a steam-injection horizontal well in a productive formation and a horizontal parallel production well located below a horizontal parallel production well, conducting research in drilled wells and determining the presence of low-permeable and impermeable bridges, hydrodynamic action on a bridge with the formation of a hydrodynamic connection between parallel wells, steam injection into wells with the formation of a steam chamber in the formation, injection of steam into injection wells and withdrawal of formation products from production wells. Preliminary, during well construction, by analyzing the cores, the pressure of formation of cracks in the bridges and the violation of the integrity of the formation roof are determined. Injection wells are selected by research, which cross the bridges. Equipment is lowered into each selected well for selective action with cut-off along the edges by packers of the well interval interacting with the bridge. Hydrodynamic stimulation of the dam is carried out by injecting steam through the equipment for selective stimulation with a pressure at least 5% higher than the fracturing pressure in the corresponding dam, but lower than the pressure of breaking the integrity of the formation top. After the formation of fractures in the dam sufficient to participate in the development of the formation, which is determined by the presence of a hydrodynamic connection with a parallel production well, the equipment for selective action is removed and removed from the injection well. Steam injection is started into a parallel production well and transferred to steam injection along the entire length and injection well until a steam chamber is formed in the formation.

EFFECT: simplification of reservoir development is provided.

1 cl, 1 dwg