孔隙网络模型法计算水相滞留对气体渗流的影响  

The influence of aqueous phase trapping on gas flow by pore scale network model

作　　者：王金勋[1] 吴晓东[1] 潘新伟[1] 

机构地区：[1]石油大学

出　　处：《石油勘探与开发》2003年第5期113-115,共3页Petroleum Exploration and Development

基　　金：国家重点基础研究发展规划(973)资助项目(2001CB209107);中国博士后科学基金(2002032084)

摘　　要：孔隙结构是影响气藏储集层孔喉中水相滞留的一个重要因素。考虑滞留的水相在孔隙中的微观分布,利用Bethe网络模型模拟,研究水相滞留对不同孔隙结构体系的气体渗流能力的影响规律,主要包括孔喉大小和分布均匀程度等影响因素。初步模拟计算表明,应用孔隙网络模型研究水相滞留对气体渗流的影响规律是可行的,能将水相微观滞留堵塞机理与宏观损害程度相联系。Aqueous fluid may invade into gas reservoir during drilling, completion and subsequent production operations. A portion of this fluid is still retained in the formatiom in the vicinity of wellbore even after inversing well-flushing. Permeability for gas phase is therefore greatly reduced in these areas. Pore structure is a key factor affecting the trapping of aqueous- phase in gas reservoir. Considering the microscopic distribution of the retained phase, Bethe network is introduced to simulate the trapping process, and predict its effect on gas permeability reduction for different size and uniformity of throat distributions. It is shown that pore scale network model is an efficient tool to relate the microscopic aqueous trapping mechanism to the macroscopic gas permeability reduction.

关 键 词：孔隙网络模型 水相滞留 气体渗流 计算 

分 类 号：TE312[石油与天然气工程—油气田开发工程]