Abstract: In view of the problems of difficult establishment of effective displacement system and poor effect of water drive in Chang 8 reservoir of C335 area of JY oilfield, the reservoir development effect was evaluated comprehensively by reservoir pressure change, water drive law and effect characteristics. On this basis, combining with reservoir engineering and numerical simulation, this article formulated reasonable exploitation policy. The optimum injection⁃production ratio was 2.0, the flow pressure was 6.0 MPa, and the production rate was 0.7%. Finally, by comparing and forecasting the three schemes, the comprehensive scheme was the best.

Key words: Ultra?low permeability reservoir, Evaluation of development effectiveness, Exploitation policy, Scheme optimization

摘要： 针对JY油田C335区长8油藏有效驱替系统难建立、水驱见效差的问题，通过油藏压力变化、水驱规律及见效特征综合评价了油藏开发效果。在此基础上，结合油藏工程、数值模拟等多种手段，制定了合理开发技术对策，优化注采比为2.0，流动压力为6.0 MPa，采液速度为0.7%；对比三套方案可知，综合方案为最佳开发调整方案。

关键词: 超低渗油藏, 开发效果评价, 开发对策, 方案优化