致密砂岩气藏井网加密潜力快速评价方法

发布时间：2018-01-04 02:21

本文关键词：致密砂岩气藏井网加密潜力快速评价方法　出处：《石油与天然气地质》2016年01期 　论文类型：期刊论文

【摘要】：致密砂岩气藏地质条件复杂,采收率较低,国内外开发实践表明井网加密已成为此类气田提高采收率的关键技术。针对致密砂岩气藏开发井数多、快速评价井网加密潜力数值模拟方法不经济、地质统计法和移动窗口法评价结果与实际差异较大等问题,综合地质研究与气井动态资料,采用不稳定流动分析方法,建立井网密度与单井增加可采储量的关系。从加密井单井增加可采储量出发,结合经济学原理,建立了加密效益函数,能够快速准、确预测出开发区是否具有加密潜力及加密潜力大小,为气田调整挖潜决策提供可靠依据。实例应用结果表明,大牛地气田DK13井区山西组1段天然气在目前成本和价格下,经济最佳井网密度为2.2口/km2,经济极限井网密度为7.06口/km2,加密潜力较大。
[Abstract]:The geological conditions of tight sandstone gas reservoir are complex and the recovery is low. The development practice at home and abroad shows that well pattern infill has become the key technology to improve oil recovery in this kind of gas field. The rapid evaluation of well pattern infill potential numerical simulation method is not economical, geological statistics method and moving window method are quite different from the actual evaluation results, comprehensive geological research and gas well dynamic data. The relationship between the density of well pattern and the increase of recoverable reserves in single well is established by using the method of unstable flow analysis. From the point of view of increasing recoverable reserves in infill single well and combining with the economic principle, the infilling benefit function is established, which can be fast and accurate. It is sure to predict whether the development zone has encryption potential and the magnitude of infilling potential, which provides a reliable basis for the decision of gas field adjustment and tapping potential. The application results of an example show that. Under the current cost and price, the best well pattern density is 2.2 / km ~ 2, and the economic limit well pattern density is 7.06 / km ~ 2. Encryption potential is great.
【作者单位】：中国石化海相油气田开发重点实验室;中国石化石油勘探开发研究院;
【基金】：国家科技重大专项(2011ZX05045) 中国石化科技攻关项目(P12101)
【分类号】：TE332
【正文快照】： 致密砂岩气藏储层物性差、非均质性强、砂体规模较小、单层储量丰度低[1-7],采收率一般较低[8-9]。美国致密砂岩气开发经验表明:加密钻井可以增加波及面积、提高储量动用程度、提高气井的采收率,井网加密已经成为开发致密砂岩气藏的主要技术之一[10-12]。但实际操作过程中面临

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