关键词: 陆相, 水驱油藏, 河道砂, 剩余油富集区, 提高采收率

Abstract:

The application and progress of the water drive technology were discussed for enhancing oil recovery in Shengli Oilfield with high water-cut in the eastern China.The formation mechanism and distribution of the remaining-oil enrichment areas were revealed by experiments of water drive and mathematical simulation calculation.It showed that the low-grade faults,interlayer and dominant channels were the main geological controlling factors for the remaining oil in the high water-cut oilfields.The technologies were used to predict remaining-oil distribution,such as the low-grade fault description and forecast technologies,reservoir interlayer characterization,fluvial facies reservoir architecture and comprehensive geophysics of reservoir.It showed that the remaining-oil enrichment areas were controlled by the low-grade faults and interlayer in the high water-cut sand reservoir.Good effects have been achieved by applying the enhancing oil recovery technologies such as fine development adjustment and complicated structure well.The current challenge and favorable techniques were analyzed for enhancing the water drive recovery in the old oilfields.

Key words: continental facies, water drive reservoir, fluvial sandstone, remaining-oil enrichment area, enhance oil recovery