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基于凝析气相变的凝析油聚集规律研究
引用本文:唐恩高,李相方,童敏,王志伟.基于凝析气相变的凝析油聚集规律研究[J].石油勘探与开发,2005,32(5):105-107.
作者姓名:唐恩高  李相方  童敏  王志伟
作者单位:1. 中国石油大学(北京)
2. 中国石油勘探开发研究院
基金项目:国家自然科学基金项目(90210018);国家基础研究发展规划(973)项目(2001CB209108).
摘    要:在凝析气藏衰竭开发过程中,当压力低于露点压力时反凝析油会在井筒附近聚集,堵塞凝析气的渗流通道,降低气相有效渗透率,导致产能降低,且两相流动区和凝析油堵塞区将随着生产的延续不断向远井处扩展。根据Fevang和Whitson等对凝析油气的流动分区,利用物质平衡原理和拟稳态渗流理论,对凝析气藏衰竭开发过程中的3区变化规律进行了严格推导,得到凝析气藏衰竭开发过程的3区扩展模型。利用3区在凝析气藏中扩展和缩小的规律,能够准确预测凝析油气两相流动区和凝析油堵塞区变化规律,为正确评价凝析气井的产能提供理论依据。实例计算表明,新模型预测的3区扩展模型是正确的。

关 键 词:凝析气藏  凝析气  相变  凝析油聚集  有效渗透率  流动分区
文章编号:1000-0747(2005)05-0105-03
收稿时间:09 20 2004 12:00AM
修稿时间:2004-09-202005-06-22

Research of condensate accumulation based on phase change of gas condensate
TANG En-gao,LI Xiang-fang,TONG Min,WANG Zhi-wei.Research of condensate accumulation based on phase change of gas condensate[J].Petroleum Exploration and Development,2005,32(5):105-107.
Authors:TANG En-gao  LI Xiang-fang  TONG Min  WANG Zhi-wei
Affiliation:China University of Petroleum, Beijing 102249, China;China University of Petroleum, Beijing 102249, China;Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China;China University of Petroleum, Beijing 102249, China
Abstract:For condensate gas reservoirs producing below the dew-point pressure, condensate accumulates near wellbore, blocking flow channels of condensate gas and decreasing gas effective permeability and productivity. With the continuing of the production, two-phase flow area and condensate blocking area extend outwards. Based on the flow regimes division of Fevang, Whitson, et al, the extension models of the 3 zones in the condensate gas reservoirs under depletion development were derived using the material balance theory and the pseudosteady percolation theory. The alteration of the two-phase flow area and condensate blocking area can be accurately predicted with the models, providing theoretical basis for the reasonable evaluation of the condensate gas productivity. The case study proves the accuracy of the models.
Keywords:gas condensate reservoir  gas condensate  phase change  condensate accumulation  effective permeability  flow regimes division
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