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注水油田进入高含水期,剩余油分布复杂,挖潜难度大,为提高水驱采收率,提出了将研究单元细化到油砂体的剩余油精细挖潜方法。在精细地质研究的基础上,结合生产动态数据和测试资料,根据油砂体上井网控制情况、水驱特征和边水能量特征,将油砂体划分为弹性驱、注入水驱、注入水+边水驱、边水驱和未动用等类型,详细解剖不同类型油砂体的动用情况,分析不同类型油砂体的剩余油分布模式和潜力,提出了不同类型油砂体的剩余油挖潜方法。利用该方法对注水油田的剩余油进行了挖潜,水驱效果大大提高。研究表明,以油砂体为对象的剩余油挖潜方法可以有效提高注水油田高含水期的开发效果,为剩余油的挖潜提供了新的思路。
Water injection into the high water cut period, the remaining oil distribution is complex, difficult to tap the potential, in order to improve the waterflood recovery, proposed refinement of the study unit refined oil to the remaining oil fine tapping potential method. On the basis of fine geologic study, combining the production dynamic data and test data, according to the well control pattern, waterflooding characteristics and edge water energy characteristics of oil sand body, the oil sands body is divided into elastic flooding, water flooding, water injection + Edge water flooding and edge water flooding and unutilization, detailedly dissect the utilization of different types of oil sands, analyze the remaining oil distribution patterns and potential of different types of oil sands, and propose methods for tapping the remaining oil of different types of oil sands . Using this method, the remaining oil in the waterflooding oilfield was tapped and the waterflooding effect was greatly improved. The research shows that the remaining oil tapping method targeting the oil sands can effectively improve the development effect of the high water cut period of the waterflooding oilfield and provide a new idea for tapping the remaining oil.