HIGH-VISCOUS AND HEAVY OIL FIELD DEVELOPMENT METHOD WITH THERMAL ACTION Russian patent published in 2009 - IPC E21B43/24 

FIELD: oil industry.

SUBSTANCE: invention refers to development of oil fields, and namely to methods of thermal action on the deposit containing high-viscous oil. Method involves sinking of rows of vertical pressure and production wells, sinking of horizontal pressure wells along the rows of vertical wells, pumping of heat carrier to the horizontal wells and withdrawal of high-viscous and heavy oil from vertical production and pressure wells. Under each horizontal pressure well there drilled within the same productive bed is an additional horizontal production well for withdrawing high-viscous and heavy oil. Vertical production and pressure wells are arranged in rows in turn. From vertical production wells there withdrawn is high-viscous heavy oil till heat carrier enters them from horizontal pressure wells; after that, filling of the vertical pressure wells with heat carrier is stopped and they are transferred to production wells, and those production wells where the heat carrier entered are transferred to pressure wells. Later, when heat carrier enters from horizontal pressure wells to vertical production wells which have been transferred from pressure wells before, then vertical pressure wells are transferred to production wells, and vertical production wells are transferred to pressure wells and the cycle is repeated till bottom-hole zone of vertical and horizontal wells is completely developed.

EFFECT: enlarging the coverage of thermal action of the deposit owing to addition of movement of filtration liquid flows therein, and therefore, increasing coverage coefficients, as well as increase of the deposit production rate.

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