朝661-80区块封闭断层内部加密井的部署方法研究

朝阳沟油田朝661-80区块油藏为低渗透油藏,目前整装待加密区块已经很少,因此断层边部将是油田加密挖潜的对象。其中利用直井加密开发断层附近油藏的弊端日益凸显,大斜度井开发可行性研究的论证认为,该区块油藏部署大斜度井开发的优势明显。在断层走向剩余油分布规律的基础上运用数值模拟的方法设计断层附近不同布井方案,并对开发方案结果进行预测,结果表明在断层边部部署加密井较大幅度提高单井产能,且适当的部署大斜度井提高单井产量的效果更佳,此种布井方式对该区块提高单井控制可采储量与提高增采幅度具有重要意义。

Study on Infill Well Pattern in Internal Sealing Fault of Chaoyanggou 661-80 Block

661-80 Block reservoir of Chaoyanggou oil field is low permeability reservoir, the blocks ready for infill well pattern are very few, so the fault edge is oilfield exploration object for infill well pattern. The disadvantages of the use of vertical wells infill development near fault reservoir is growing, high angle wells development feasibility study demonstrated that the advantage of high angle block reservoir development is obvious. Based on analysis of the remaining oil distribution at the fault, numerical simulation method was used to design fault well spacing, and the result of the development plan was forecasted. The results show that the fault side deployment of infill well can greatly improve the single well productivity, and the proper deployment of high angle wells has better effect to increase production of single well, the well spacing mode to improve the single well production of the recoverable reserves and improve the increase amplitude is of great significance.