谢维扬,李晓平,张烈辉,王俊超,程子洋,袁淋
XIE Wei-yang,LI Xiao-ping,ZHANG Lie-hui,WANG Jun-chao,CHENG Zi-yang,YUAN Lin
摘要:
由于水平井钻井技术及水力压裂工艺的进步,页岩气藏已经可以开采得到工业气流。基于页岩气藏特殊渗流机理及解吸扩散规律,建立了在水平井钻井及多级压裂生产条件下综合考虑井筒储集、表皮效应、水力裂缝参数等多种因素影响下的双重介质页岩气多级压裂水平井不稳定渗流模型。通过运用点源函数法、Laplace变换、特征值法、正交变换法及Stehfest数值反演得到了双重介质页岩气多级压裂水平井产量递减特征曲线,分析了产量递减特征曲线对于表皮因子、吸附因子、裂缝条数、水平井长度以及裂缝渗透率的敏感性。该模型及研究可以用于更精确有效地预测页岩气多级压裂水平井产量动态变化。
中图分类号:
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