摘要
针对高饱和油藏H8断块脱气后开发效果变差的问题,开展了微观水驱油实验及核磁共振实验,剖析了油藏脱气后的渗流特征,认清了剩余油微观赋存状态特征;在此基础上,进一步开展了岩心驱替实验,分析对比了衰竭开采、注水开发、压力恢复及注不同介质开发方式的开发效果,明确了剩余油动用条件以及后续开发对策。研究结果表明,为实现高饱和油藏效益开发,必须及时补充地层能量,越早注水开发效果越好;地层脱气后,注水提压无法有效改善开发效果,相较于CO_(2)驱,注表活剂驱对该区块剩余油的动用效果更好。
To address the issue of poor development effect after degassing in the H8 Fault Block of high-saturated reservoirs,microscopic waterflooding experiments and nuclear magnetic resonance experiments were carried out.The seepage characteristics after degassing were analyzed,and the microscopic occurrence characteristics of remaining oil were identified.On this basis,core displacement experiments were further conducted to analyze and compare the development effects of depletion production,water injection development,pressure recovery,and injection of different media.The remaining oil mobilization conditions and subsequent development strategies were clarified.The research results show that to achieve efficient development of high-saturated reservoirs,timely replenishment of formation energy is essential,and the earlier the water injection is implemented,the better the development effect.After formation degassing,water injection for pressure restoration cannot effectively improve the development effect.Compared with CO_(2) flooding,surfactant injection shows better performance in mobilizing the remaining oil in this block.
作者
丁沐汝
黄艳梅
周伟
DING Muru;HUANG Yanmei;ZHOUWei(Exploration and Development Research Institute of Jiangsu Oilfield Company,SINOPEC,Yangzhou 225009,China;Science and Information Management Department of Jiangsu Qilfield Company,SINOPEC,Yangzhou 225009,China)
出处
《复杂油气藏》
2025年第4期482-487,共6页
Complex Hydrocarbon Reservoirs
基金
中国石化江苏油田分公司科技项目计划“开发中后期测井成果再评价及潜力研究”(JS24016)。
关键词
高饱和油藏
脱气
微观水驱油实验
核磁共振
渗流特征
剩余油赋存特征
开发对策优化
high-saturated reservoir
degassing
microscopic waterflooding experiment
nuclear magnetic resonance
seepage characteristics
residual oil occurrence characteristics
development strategy optimization
