经过长期注水开采油田进入高含水期,油层内油、气、水交错渗流,剩余油的挖潜难度加大。高含水剩余油分布研究主要从剩余油分布研究方法、剩余油分布特征、剩余油分布控制因素三方面进行。总结目前剩余油分布及挖潜技术研究的国内外研究状况和最新进展,提出周期注水、降压开采等剩余油挖潜措施。 After prolonged water injection, the oilfields enter the high water cut period and the oil, gas and water cross flow in the oil layer make it more difficult to tap the remaining oil. The research on the distribution of remaining oil in high water cut mainly proceeds from the research methods of remaining oil distribution, remaining oil distribution and controlling factors of remaining oil distribution. At the same time, the research status and the latest progress of the current research on residual oil distribution and tapping potential technology are summarized, and the remaining oil tapping measures such as periodic injection and step-down extraction are proposed.