Abstract: To exploit "large scale" unswept remaining oil is the first step of research strategy for enhancing oil recovery factor.One has proved that the viewpoint that the horizontal sidetrack is the most important technology for exploiting "large scale" unswept remaining oil in mature oilfields from three aspects.They are:(1) the horizontal sidetrack is the main technology for exploiting primary rich areas of "large scale" unswept remaining oil in mature oilfields; (2) the horizontal sidetrack can hit any rich area of "large scale" unswept remaining oil in reservoirs; (3) the cost of the horizontal sidetrack is more low in contrast with the vertical well and the conventional horizontal well.It is indicated that horizontal sidetrack technology has a bright future,so one should make the technology of a efficient,cheap become a complete set and routine techniques.The one object of studies is enhancing effects and reducing costs,and the research method is multidisciplinary team work and introducing various new technique.

Key words: mature field, horizontal sidetrack, remaining oil, routine technology, economic evaluation

摘要： 开采“大尺度”未波及剩余油是提高油田采收率研究战略的第一步.从三方面论证了侧钻水平井是开采成熟油田“大尺度”未波及剩余油最重要的技术这一观点:1侧钻水平井是开采成熟油田“大尺度”未波及剩余油主要富集区的主要技术;2侧钻水平井可钻达油层中任何部位的“大尺度”未波及剩余油富集区;3侧钻水平井比钻垂直井和常规水平井费用低得多、更加经济.指出,侧钻水平井有极广阔的应用前景,因此应使这项技术成为一种高效的、经济的、配套的常规技术,研究的目标是增强效果和降低成本,研究的方法是多学科联合攻关和引入各种新技术.

关键词: 成熟油田, 侧钻水平井, 剩余油, 常规技术, 经济评价