METHOD OF DEVELOPMENT OF HIGH-VISCOSITY OIL POOL Russian patent published in 2003 - IPC

FIELD: oil producing industry; applicable in development of high-viscosity oil pools. SUBSTANCE: method includes singling-out of upper formations with low permeability and lower formations with high permeability, with difference of their permeabilities by a factor, at least, 2. Producing horizontal wells are located in upper formation, and injection horizontal wells are located in lower formation. All horizontal wells are located in same direction. In plan, horizontal producing wells in upper formation are located in line, one after another, in parallel rows. Horizontal injection wells in lower formation are located between rows of horizontal producing wells. Length of each horizontal injection well is selected larger than distance between beginning and end of horizontal producing well. Beginning and end of horizontal producing wells. Working agent is injected through horizontal injection wells. Oil is withdrawn from horizontal producing wells. EFFECT: higher oil recovery from oil pool. 2 dwg, 1 ex