UNDERGROUND-SURFACE METHOD OF DEVELOPMENT OF HIGH- VISCOSITY OIL DEPOSIT Russian patent published in 2003 - IPC

FIELD: oil and gas industry, specifically, thermal oil mine method of development of high-viscosity oil and natural bitumen. SUBSTANCE: mine working is driven in productive pool or beneath it. From mine working there are drilled gently rising steam-distribution and production wells. Vertical injection wells are drilled from surface. Heat transfer agent is injected into them. Steam is utilized as heat transfer agent. Steam is distributed over pool through gently rising steam-distribution wells. They are drilled from mine working in parallel to production wells. Bottoms of steam-distribution wells are oriented towards roof of oil pool. They cross injection wells or pass in zone of their influence. Additional production wells are oriented beneath bottoms of vertical injection wells. Each steam- distribution and additional production well is drilled from one point of mine working in the form of radial rays located in one vertical plane. When additional production well is filled with steam it is transferred to category of steam-distribution wells. EFFECT: accelerated bringing of developed section to planned level of oil production, decreased time of development of deposit. 2 dwg