田冷;申智强;王猛;潘少杰;肖聪;董力珲;

• 1:中国石油大学(北京)石油工程教育部重点实验室

• 2:中国石油大学(北京)石油工程学院

摘要(Abstract)：

基于页岩气藏压裂水平井三线性流模型,考虑页岩气滑脱效应,分析页岩气的吸附、天然裂缝的应力敏感和人工裂缝的非达西效应,建立页岩气产能模型,运用全隐式有限差分和牛顿—拉普森迭代法进行数值求解,绘制无因次产量递减曲线。结果表明:页岩气的流动阶段分为人工裂缝中不稳定线性流阶段、人工裂缝和微裂缝的双线性流阶段、微裂缝中不稳定线性流阶段、微裂缝和基质的双线性流阶段、基质中线性流动阶段、边界流阶段;如果忽略滑脱效应,将导致页岩气产能预测产生误差。当页岩基质孔隙直径小于20nm时,滑脱效应造成的产量增加5%~25%。该结果对于认识页岩气藏水平井产能递减规律具有指导意义。

关键词(KeyWords)：页岩气;水平井;纳米孔隙;滑脱效应;应力敏感效应;非达西渗流

Abstract:

Keywords:

基金项目(Foundation):国家自然科学基金项目(U1562102);; 中国石油大学(北京)基金项目(2462015YQ0218)

作者(Author):田冷;申智强;王猛;潘少杰;肖聪;董力珲;

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