FIELD: oil industry.
SUBSTANCE: thermoshaft method of high-viscosity oil development includes steam delivery to oil formation through surface injecting wells and steam distribution by a producer well with two wellheads. Drilling galleries in oil formation are laid in the lower part of productive formation as per panel scheme. In the central part of the developed drilling section producer wells are made perpendicular to each other thus forming a dense grid cased with heat-insulated casings. Steam delivery is made cyclically; steam delivery is regulated depending on permeability of the injecting well and pressure at wellheads of producer wells. Oil production is made upon reduced pressure of steam by terns from different sides of wells.
EFFECT: high percentage of oil recovery due to even volumetric distribution of thermal fields starting from the lower part of the productive oil formation.
4 dwg
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