泡沫混排解堵数学模型及数值模拟  

Mathematical Model and Numerical Simulation of Foam Plug Removal

作　　者：王飞 李兆敏[1] 李松岩[1] 杜庆军[2] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中国石油大学(华东)地球科学与技术学院,山东青岛266580

出　　处：《计算物理》2015年第1期58-64,共7页Chinese Journal of Computational Physics

基　　金：国家高科技研究发展计划(863计划)(2013AA064801);国家自然科学基金青年基金(11102236)资助项目

摘　　要：建立泡沫井筒流动模型与泡沫地层渗流模型,得到完整的泡沫混排解堵数学模型;利用数值方法对模型进行耦合求解,得到泡沫压力,质量,密度在井筒中的分布及井口井底压力的变化规律.在固定井口回压情况下,得到井底压差的变化规律.结果表明:随着井深的增加,泡沫压力增加,质量减小,密度增加;固定井口回压,井底压差则逐渐变小.With a model of foam wellbore flow and a model of foam seepage flow, a mathematical model of foam plug removal is given. The model is solved with numerical method. Distributions of foam pressure, foam quality, foam density along wellbore and wellhead and bottom pressure are discussed. Furthermore, variation of bottom hole differential pressure is given as wellhead back pressure is fixed. It shows that as foam pressure and density increases,foam quality decreases with increase of well depth and bottom hole differential pressure declines.

关 键 词：泡沫混排 地层渗流 井筒流动 数学模型 井底压差 

分 类 号：TE319[石油与天然气工程—油气田开发工程]