DEVELOPMENT METHOD OF HIGH-VISCOUS OIL AND BITUMEN FIELDS WITH WELLS WITH INCLINED HORIZONTAL SECTIONS Russian patent published in 2009 - IPC E21B43/24 

FIELD: oil industry.

SUBSTANCE: invention refers to oil industry, and namely to development of oil fields, and particularly high-viscous oil and bitumen deposits by using heat and inclined horizontal wells. Method involves well sinking according to a certain pattern, delivery of displacement agent through pressure wells located closer to the upper limit of the bed, and withdrawal of formation fluids through production wells located closer to the lower limit of the bed. Prior to sinking of inclined horizontal sections of wells the bed's zones with similar permeability are determined with geophysical investigations. From vertical production wells there drilled are inclined horizontal sections with an offset as to the horizontal angle relative to the pattern within the zones with the same in-place permeability, in which production wells are located parallel to each other. From vertical pressure wells there drilled are inclined horizontal sections in parallel direction of the nearest inclined horizontal sections of production wells within the appropriate zone with the same in-place permeability.

EFFECT: increasing the coverage of high-viscous oil and bitumen development zone, as well as improving efficiency of the method when developing high-viscous oil and bitumen fields with wells with inclined horizontal sections considering heterogeneity of the bed as to permeability without constructing additional wells.

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