METHOD FOR SECONDARY OIL RECOVERY Russian patent published in 1995 - IPC

FIELD: oil producing industry. SUBSTANCE: method for secondary oil recovery includes use of gas condensate from gas condensate field. After recovery and supply through main pipeline, it is freed from light and heavy components and injected into injection wells of depleted oil field. In this case, pressure of injected gas condensate before its admission to producing well is maintained at the level providing for its liquid state, and after recovery from producing well of mixture of residual oil with gas condensate, oil is separated and directed to oil plant, and gas, to gas processing plant. EFFECT: higher efficiency of secondary recovery from depleted oil field with simultaneous provision of standard quality of gas condensate for its processing. 1 dwg