METHOD FOR DEVELOPMENT OF NON-UNIFORM SECTION OF ULTRAVIOLET OIL DEPOSIT Russian patent published in 2020 - IPC E21B43/24 E21B7/04 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil-producing industry. In method for development of non-uniform section of ultraviscous oil deposit, which includes drilling of horizontal production well, 2–4 horizontal injection wells with length of each horizontal borehole 0.2–0.5 of horizontal borehole length are drilled above horizontal production well at 5–15 m. In plan view, horizontal shafts of each injection well are made at angle of 45–90 degrees to horizontal shaft of production well. Distance S between horizontal shafts of injection wells is selected depending on permeability and dimensions of formed steam chamber, for this purpose hydrodynamic simulation of steam injection at different S. Uniformity of oil inflow and development of reserves is controlled by operating modes of injection wells and, accordingly, rate of formation of steam chambers.

EFFECT: technical result is higher oil recovery of non-uniform section of ultraviscous oil.

1 cl, 1 dwg, 2 ex