油藏近井地带油水两相径向渗流特征  

Water/oil radial flow behavior near well bore zones in oil reservoir

作　　者：姚同玉 李继山[2] 黄延章[3] 

机构地区：[1]中国石油大学石油工程学院,山东青岛266580 [2]胜利油田有限责任公司地质科学研究院,山东东营257015 [3]中国科学院渗流流体力学研究所,河北廊坊065007

出　　处：《重庆大学学报（自然科学版）》2013年第3期141-146,共6页Journal of Chongqing University

基　　金：国家重点基础研究发展规划(973)资助项目(2005CB221304)

摘　　要：实际油藏中近井地带渗流为平面径向流,首先建立了二维两相径向渗流方程,得到了相对渗透率比值与流体饱和度关系解析解,然后设计了平面径向渗流实验,并用该解析解对渗流特征进行了分析,并与常规JBN处理结果进行了比照,得到近井地带油水径向渗流新特征。研究结果表明,建立的解析模型,能表征近井地带油水相渗关系,并且平面径向流模型试验结果说明,在近井地带,相对渗透率比值与流体饱和度呈直线关系对应的饱和度区间变小,油水在渗流中呈现出更为复杂的渗流关系,以非线性作用为主。The flow behavior of water and oil near well bore zones in oil reservoir is radial flow.Based on the fluid displacement experiments in radial systems,the equation describing radial flow is investigated and analytical solution about the relationship between relative permeability ratio and saturation is obtained.The analytical solution is used to treat the experiment results and the two phase flow behavior of water and oil is characterized.The results show that the analytical solution can characterize the actual flow of water and oil near well bore zone.According to the radial experiments,the saturation scope in which the relative permeability ratio and saturation is linear is smaller.The flow behavior of water and oil near well bore zones is complex and nonlinear.

关 键 词：油藏 两相流 近井地带渗流 径向流 相对渗透率 解析解 

分 类 号：TE312[石油与天然气工程—油气田开发工程]