胜利海上埕岛油田多井型经济井网模式研究

Study on Economical Well Pattern of Multi-Well Type for Offshore Chengdao Oilfield

埕岛油田受河流相储层砂体发育形态、多井型联合布井及开发政策影响,水驱前缘推进极不均衡,制约了油田开发效益进一步提升。本文在埕岛油田已投产各类油井分类评价的基础上,采用油藏工程、油藏数值模拟、开发经济评价3种方法结合,开展了不同砂体发育形态下的多井型效益开发模式研究。根据埕岛油田不同井区、层系的砂体发育特征,推荐采用差异化井网配置型式;同时,高含水期效益开发技术政策的制定应充分考虑砂体特征、油价、成本、剩余油饱和度等综合影响,根据多井型部署经济界限图版,油价50美元/桶,水平段长度250米条件下,测算经济井网中水平井布井经济极限厚度为7.1米。

By the influence of Chengdao Oilfield fluvial reservoir sand body morphology, multi joint type wells and development policy, water drive front is extremely uneven, which restricts further enhancing the efficiency of oil field development. Therefore, based on the classification evaluation of Chengdao Oilfield horizontal wells in production, using three combination method of reservoir engineering, reservoir numerical simulation and economic evaluation to carry out research on multi-well benefit development model. The results of the study show that, according to the development characteristics of Chengdao Oilfield sand bodies, differentiated well network configuration is recommended; formulating technical policy for benefits of horizontal wells with high water content should fully consider the impact of sand body characteristics, oil price, cost and the remaining oil saturation. According to the horizontal well deployment limit chart, at the price of 50$/bbl, with the length of horizontal section 250 m, the calculated economic limit thickness for the horizontal wells is 7.1 m.