STUDY AND APPLICATION OF ENHANCED OIL RECOVERY WITH PERIODS WATER FLOODING IN VISCOUS OIL RESERVOIR

The movement disciplinarian of oil-water in homogeneity or heterogeneity formation was dissected proceed in the process of water control through the research of pulsating flow water flooding mechanism and its adaptability analysis. Compare with general water flooding, periods water flooding can enhance oil recovery and excavate residual oil completely. Combining with the status of fault block Gao30, the technology of "Large scope short period pulsating water flooding" was developed and development effect was improved remarkably. The main used method is to mark off injection production system as water control unit. With the development practice, new cognition was sum up which made the injection-production system more close to the formation, so some high producing well were cultivated, water drive status of this reservoir was improved sharply.