特种油气藏2012，Vol.19Issue(3)：74-76,3.DOI:10.3969/j.issn.1006-6535.2012.03.018
低渗透应力敏感气藏压裂井产能分析
Analysis of fractured well productivity in low-permeability stress-sensitive gas reservoir
摘要
Abstract
The seepage problem in gas well with vertical fractures is converted to one-dimensional ribbon seepage which is easy to be solved by using conformal transformation principle. Based on Forchheimer binomial flow equation, a productivity formula of wells with vertical fractures in low-permeability stress-sensitive gas reservoirs has been deduced by taking account of threshold pressure gradient and stress sensitivity of permeability, and a production formula under conditions of low pressure and high pressure has been derived through simplification. The formulas have been verified with field data, and theoretical production curve has been constructed and analyzed. The results show that threshold pressure gradient and stress sensitivity can influence the productivity of fractured wells; the production of fractured gas wells decreases with the increase of threshold pressure gradient or stress sensitivity; when gas well is high yielding, non -Darcy flow effect must be considered.关键词
启动压力梯度/应力敏感/压裂井/产能/低渗透气藏Key words
threshold pressure gradient/ stress sensitivity/ fractured well/ productivity/ low permeability gas reservoir分类
能源科技引用本文复制引用
张强,王永清,张楠,杨玲智,蒋睿..低渗透应力敏感气藏压裂井产能分析[J].特种油气藏,2012,19(3):74-76,3.基金项目
国家科技重大专项“大型油气田及煤层气开发”(2008ZX05048) （2008ZX05048）
