考虑滑脱效应的低渗透气藏压裂井产能分析  

Productivity analysis for fractured well in low-permeability gas reservoirs considering slippage effect

作　　者：李冬瑶[1] 程时清[1] 郑春峰[1] 

机构地区：[1]中国石油大学,北京102249

出　　处：《特种油气藏》2009年第2期59-61,共3页Special Oil & Gas Reservoirs

基　　金：国家863项目"特殊结构井开发油藏工程技术"(2006AA09Z338)资金资助

摘　　要：大量渗流实验证实,在一定的条件下,气体在低渗透气藏中渗流时会受到滑脱效应的影响。针对均质等厚低渗透气藏的一口压裂气井,应用保角变换原理,将求解垂直裂缝气井产量问题转化为简单的单向渗流问题。考虑二项式渗流效应、滑脱效应的影响,推导出低渗透气藏压裂井产能方程。对不同程度滑脱效应影响下的各流入动态曲线进行对比分析。结果表明:在低流压阶段,随着滑脱系数的增大,压裂气井的产量越来越大。该研究对低渗透气藏低压生产阶段压裂气井的产能计算及动态分析具有现实意义。A lot of percolation experiments have confirmed that gas flow in low-permeability reservoirs could be influenced by slippage effect under certain conditions. By using conformal transformation principle, the calculation of production from vertical fracture gas well is transformed into a simple problem of unidirectional percolation for fractured gas well in homogenous low-permeability gas reservoir with uniform thickness. The productivity equation of fractured wells in low-permeability gas reservoirs has been derived with consideration of binomial percolation and slippage effect. Inflow performance curves are comparatively analyzed under different slippage effects. The results show that the productivity of fractured gas well will increase with slip factor increasing in low flow pressure stage. This study is of practical significance to productivity calculation and performance analysis for fractured gas wells in low-permeability gas reservoirs in low pressure production stage.

关 键 词：低渗透气藏 滑脱效应 压裂 产能方程 流入动态曲线 

分 类 号：TE33[石油与天然气工程—油气田开发工程]