毛细管数效应对凝析气井流入动态的影响

新疆石油地质 ›› 2006, Vol. 27 ›› Issue (2): 194-196.

毛细管数效应对凝析气井流入动态的影响

童敏¹, 胡永乐¹, 李相方², 王志伟²

1.中国石油石油勘探开发科学研究院开发所, 北京 100083;
2.中国石油大学石油天然气工程学院, 北京 102249

收稿日期:2005-06-13 修回日期:2005-06-13 出版日期:2006-04-01 发布日期:2020-10-30
作者简介:童敏(1968-) , 男, 四川武胜人, 博士, 油气田开发,(Tel) 010-62097751(E-mail) tongmin4547@126.com.
基金资助:
国家973 课题, 高效天然气藏形成分布与凝析、低效气藏经济开发基础研究(2001CB209100) 资助

The Influence of Capillary Number Effect on Inflow Performance in Condensate Gas Well

TONG Min¹, HU Yong-le¹, LI Xiang-fang², WANG Zhi-wei²

1. Research Institute of Petroleum Exploration and Development, Petro China, Beijing 100083, China;
2. Institute of Oil-Gas Engineering,China University of Petroleum, Beijing 102249, China

Received:2005-06-13 Revised:2005-06-13 Online:2006-04-01 Published:2020-10-30

摘要/Abstract

摘要： 凝析油析出是凝析气藏开发中普遍存在的现象, 因而常表现出与干气流入动态不同的特性。理论和现场应用表明, 直接利用干气或折算方法进行凝析气井动态预测会带来较大的误差。其原因是忽略了反凝析液对凝析油气相对渗透率的影响。利用凝析气相态理论和闪蒸计算方法, 考虑流体相态和组分的变化以及凝析气井的表皮系数, 引入稳态理论的两相拟压力函数, 考虑毛细管数效应对凝析油气体系相对渗透率的影响, 建立了拟稳态条件下的凝析气井流入动态预测方法。实例应用表明, 采用考虑毛细管数效应的凝析油气两相拟稳态流入动态方程, 弱化了凝析油的堵塞作用, 有助于正确评估凝析气井的产能, 准确把握凝析气藏的动态特征。

关键词: 凝析气井, 流入动态, 毛细管数, 相态

Abstract: Condensate dropout is widely existent in development of condensate gas pool, usually different from gas inflow performance. The theoretical study and field application indicate that big error will occur when predicting condensate gas performance by just using dry natural gas or converting method for the reason that the influence of retrograde condensed liquid on relative permeability of condensate oil and gas is normally ignored. This paper establishes the prediction method for inflow performance of condensate gas well under condition of pseudosteady state by using the theory of condensate gas phase state and flashing method, with consideration of changes of fluid phase behavior and composition as well as skin factor of condensate gas well, along with consideration of the influence of capillary number effect on relative permeability of condensate oil and gas system by using steady state theory and two phase pseudo-pressure functions. The case study shows that the equation for two phase pseudosteady state inflow performance with consideration of capillary number effect can be helpful to properly estimate the productivity of a condensate gas well and correctly recognize the behavior of a condensate gas pool through weakening the effect of retrograde condensation.

Key words: condensate gas well, inflow performance, capillary number, phase state

中图分类号:

TE312

童敏, 胡永乐, 李相方, 王志伟. 毛细管数效应对凝析气井流入动态的影响[J]. 新疆石油地质, 2006, 27(2): 194-196.

TONG Min, HU Yong-le, LI Xiang-fang, WANG Zhi-wei. The Influence of Capillary Number Effect on Inflow Performance in Condensate Gas Well[J]. Xinjiang Petroleum Geology, 2006, 27(2): 194-196.

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