METHOD FOR DEVELOPMENT OF OIL POOL WITH HIGH-TEMPERATURE FORMATION Russian patent published in 1995 - IPC

FIELD: oil producing industry. SUBSTANCE: method for development of oil pool with high-temperature formation includes injection of working agent through injection wells, oil withdrawal through producing wells, and injection of isolating material into flooded producing wells with its subsequent holding for hardening. Isolating material is injected by fringes which are forced into formation by means of water-repelling material with viscosity less than that of isolating material. Process holding is effected after injection of each fringe of isolating material. Injection of the second and subsequent fringes is carried out under pressure ensuring overflow of water-repelling material to nonisolated zones of formation. EFFECT: increased oil recovery from pool due to isolation of flooded zones and simultaneous water-repellency treatment of adjacent zones.