凝析气藏水平井产能计算新方法及影响因素分析

发布时间：2018-06-16 07:23

本文选题：凝析气藏 + 水平井　；参考：《科学技术与工程》2017年14期

【摘要】：当前对于凝析气藏渗流和产能的研究是以直井研究较多,甚少有研究凝析气藏水平井产能。考虑压力变化对流体物性影响,对凝析气藏的产能进行研究评价。从常规的产能分析出发,考虑岩石应力敏感系数、气体高速非达西渗流因素,定义了气油两相拟压力,采用复变函数理论保角变换,推导凝析气藏气油两相渗流产能方程。实例计算表明,新公式与产能测试的误差仅为7.2%,准确程度高。产能影响因素分析表明,凝析气藏高速非达西渗流效应对产能影响较小,岩石应力敏感系数、油气体积比和滑脱因子对产能影响较大。随着岩石应力敏感系数和油气比的增大,气井无阻流量逐渐降低,而随着滑脱因子的增大,无阻流量不断增大。
[Abstract]:At present, there are more researches on percolation and productivity in condensate gas reservoirs than on horizontal wells in condensate gas reservoirs. Considering the effect of pressure change on fluid physical properties, the productivity of condensate gas reservoir is studied and evaluated. Based on the conventional productivity analysis, considering rock stress sensitivity coefficient and gas high speed non Darcy seepage factors, the gas / oil two phase pseudo pressure is defined, and the gas / oil two phase percolation productivity equation is derived by using the conformal transformation of complex variable function theory. The calculation results show that the error between the new formula and productivity test is only 7.2, and the accuracy is high. The analysis of productivity factors shows that the high speed non-Darcy seepage effect of condensate gas reservoir has little effect on productivity, while rock stress sensitivity coefficient, oil / gas volume ratio and slip factor have great influence on productivity. With the increase of rock stress sensitivity coefficient and oil / gas ratio, the unobstructed flow rate of gas well decreases gradually, while the unhindered flow rate increases with the increase of slippage factor.
【作者单位】：西南石油大学;长江大学;中国石油长庆油田分公司采油五厂;
【基金】：国家科技重大专项(2016ZX05027004,2016ZX05060006)资助
【分类号】：TE328

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