METHOD OF THERMAL STIMULATION OF HIGH-VISCOSITY OIL DEPOSIT Russian patent published in 2003 - IPC

FIELD: development of oil fields containing high-viscosity oil. SUBSTANCE: in accordance with method rows of vertical injection and production wells are drilled. Horizontal wells are drilled along rows of vertical wells. Heat transfer agent, for example, steam is periodically injected into horizontal wells. Oil is recovered from vertical producing and vertical injection wells. In periods when pumping of steam is discontinued oil is recovered from horizontal wells which are source of breakthrough of steam into vertical wells. On exhaustion of oil pool driving agent, for instance, water is injected into vertical injection wells in region of bottom holes of all wells. Simultaneously oil is recovered from the rest of wells. Horizontal wells located near vertical injection wells are filled with insulating, for instance, gel-forming compound before driving agent is injected into horizontal wells. EFFECT: raised coefficient of areal sweep efficiency and oil recovery from deposit at late stage of development of oil field. 1 cl, 2 dwg