关键词: 成熟油田, 侧钻水平井, 剩余油, 常规技术, 经济评价

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