COMBINED METHOD OF THERMAL WELL DEVELOPMENT OF HIGH-VISCOUS OIL DEPOSIT Russian patent published in 2011 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: method involves pumping of heat carrier through vertical injection wells drilled from surface near the boundary of section of developed deposit, warming of formation through steam distributing wells drilled from the gallery located in productive oil formation or below it, steam distributing wells located in affected area of injection wells or crossing them, and extraction of fluid through production wells drilled from gallery to boundary of the section. In addition, upward injection and production wells are drilled from gallery in various vertical planes in above-gallery zone restricted with vertical injection wells, roof of formation and with upper steam distributing wells or upper production wells directed towards the boundary of the section. Steam supply well is drilled from the surface to gallery and connected to underground injection wells. In addition, pumping of heat carrier is performed through steam supply well, and liquid is discharged simultaneously from all production wells.

EFFECT: increasing the heat effect coverage of the whole volume of formation and activation of its warming, increasing coefficient of oil removal and shortening the period when the developed section achieves the design level of oil production and development period of the whole deposit.

3 cl, 4 dwg, 1 ex