DEVELOPMENT METHOD OF HIGH-VISCOSITY OIL OR BITUMEN DEPOSIT WITH APPLICATION OF HYDRAULIC FRACTURE Russian patent published in 2017 - IPC E21B43/267 E21B43/24 E21B47/02 

FIELD: oil and gas industry.

SUBSTANCE: development method of high viscosity oil or bitumen deposit, using hydraulic fracture (HF) involves drilling the vertical and horizontal wells in the reservoir, represented by the upper and lower parts of the productive reservoir, separated by the impermeable interlayer, cementation of the injection and production horizontal wells with the casing strings, the casing strings perforation, the coolant pumping through the injection well and the selection of products through the production horizontal well. One exploring vertical well is drilled in the deposit with the impermeable interlayer opening and the bottomhole at 3m below the impermeable interlayer. In the exploring vertical well the hydraulic fracturing is performed in the interval of the impermeable interlayer with the formation and cementation of the fracture. Then according to the geophysical methods determine the development direction along the azimuth and the fracture height. Further perpendicular to the fracture development direction at the distance 5 m above the impermeable interlayer one injection horizontal well is drilled without crossing the exploring vertical well, so that the exploring vertical well is in the middle of the horizontal injection well, after that perform the interval fracturing from the injection horizontal well in the direction from the bottomhole to the wellhead with the impermeable interlayer opening, with the formation and cementation of fracture, using the lightweight proppant. After performing the interval fracturing, determine the half-lengths of the fractures, made from the injection horizontal well by geophysical methods. Further below the bottomhole of the exploring vertical well and at the distance of 3 m from the fracture, having the maximum half-length, one production horizontal well is drilled parallel to the injection horizontal well, provide the coolant pumping through the horizontal injection well, and the high-viscosity oil or bitumen is selected through the production horizontal well. After reduction of the production horizontal well recovery rate by 50%, the exploring vertical well is transferred to the injection well and provide the coolant pumping into it.

EFFECT: increase of the method implementation efficiency, provision of the uniform and complete development of high-viscosity oil or bitumen reserves from the deposit, increase of the deposit coverage by the thermal action of the coolant, reduction of the operating costs for the method implementation.

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