METHOD OF OIL POOL DEVELOPMENT Russian patent published in 2002 - IPC

FIELD: oil producing industry, particularly, heat methods of oil pools development. SUBSTANCE: method includes successive injection of heat carrier and nonheated water into injection wells of selected section with determination of optimal moment of transition from heat carrier injection of injection of nonheated water and oil withdrawal through producing wells. Porous medium, oil and ambient rock are additionally investigated for their heat capacity and heat conduction. For selection of well section, additional depth measurement of pool temperatures are effected. Field data on volumes of injection and temperature of nonheated water for previous period of pool development are gathered. Temperature fields maps are constructed by modeling processes of heat-mass exchange. Cooled sections with high and low present oil saturation are singled out and successively injected into injection wells of selected sections are heat carrier and nonheated water, each fringe up to moment determined by modeling of processes of heat- mass exchange and for total time required for front of heat carrier fringe to reach boundary of formation section selected for heating. Heat carrier is injected successively in form of sulfuric acid and alkali. EFFECT: increased efficiency of method at late stage of oil pool development. 6 cl, 1 dwg, 1 ex