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

摘要：

总结了以胜利油田为典型代表的我国东部高含水油田提高水驱采收率的技术实施经验,通过室内物理模拟水驱油实验和数学模拟计算,揭示了剩余油富集区的形成机理和分布规律。研究结果表明,低级序断层、夹层和储层优势通道是高含水油田剩余油富集的主要地质控制因素。利用低级序断层描述与预测、夹层描述与预测、河流相储层构型以及油藏综合地球物理等剩余油分布研究技术,在高含水砂岩油藏预测出了由低级序断层和夹层控制的剩余油富集区,辅以精细开发调整、复杂结构井等针对性的提高水驱采收率技术,取得了很好的应用效果。分析并指出了老油田提高水驱采收率研究所面临的挑战和技术攻关方向。

关键词: 陆相, 水驱油藏, 河道砂, 剩余油富集区, 提高采收率