流体组成对凝析气藏产能的影响

凝析气藏与常规油气藏的重要区别在于其生产过程的相态变化特性,但目前很少考虑该特性对凝析气藏产能的影响.将凝析气藏看作各烃类化合物的混合物,通过建立i组分和总烃的渗流方程,结合相平衡热力平衡与物质平衡、初始条件和定压边界条件,应用IMPES数值计算方法得到了预测凝析气藏压裂前后生产动态的数值计算方法,分析凝析液、天然气产能变化规律和流体组成对凝析气藏产能的影响.计算表明,无论压裂与否,流体组成对凝析气藏产能都有明显影响.

Effects of Hydrocarbon Components on Production Performance in Condensates Gas Reservoirs

The phase characteristics change of condensate gas reservoirs is an important difference from conventional gas reservoirs, but now the effects on dynamic production of condensates gas reservoir is neglected.This paper considers the condensates gas reservoir as the mixture of each hydrocarbon kind of chemical compounds,then establishes flow equations of i th component and total hydrocarbon, and prediction method of production performance of condensate gas reservoirs by combining phase balance equation,thermal equilibrium equation and material conversation principle, initial condition and constant pressure boundary condition, and applying IMPES numerical simulation method. Lastly, production rate of condensate fluid and natural gas were analysed,and effects of hydrocarbon components on production performance. It was shown that the dynamic production performance have been obviously influenced by hydrocarbon components whether the formation was hydraulically fractured.