凝析气藏三区渗流模型及试井分析研究

Three-zone flow model and well testing analysis research in condensate gas reservoir

张娜 段永刚 陈伟 张力木 李树松

Zhang Na Duan Yonggang Chen wei Zhang Limu Li Shusong

西南石油大学, 四川 成都 610500; 四川石油管理局川东钻探公司, 重庆 400021

Southwest Petroleum University, Chengdu 610500, China; East Drilling Company of Sichuan Petroleum Administration, Chongqing 400021, China

根据凝析气在多孔介质中渗流时的相变特征, 建立了凝析油-气在多孔介质中的渗流方程, 并引入凝析油-气两相拟压力函数使渗流方程线性化;建立了适合于凝析气藏实际情况的三区油气渗流新模型, 并求出了凝析气藏油-气拟压力分布的解析解, 确立了凝析气井压力恢复试井资料的解释方法;通过某凝析气井的压力恢复实际资料的应用, 证明了该模型在凝析气田开发中的实际应用价值。

On the basis of phase transition characteristic of condensate gas flow in porous medium, established flow equation for condensate oil-gas in porous medium, and introduced dual-pseudo pressure of condensate oil-gas to linearize the flow equation. Then established three-zone condensate oil-gas flow model, obtained analysis solution of pseudo-pressure distribution for condensate oil-gas, and maked certain the interpretation method of build-up test for condensate gas well. Through the application of pressure build-up practical information on the condensate well, it's proved the three-zone model is valuable in condensate gas field exploitation.