低渗透毛管束单相渗流模型的建立  

Establishment of Single Phase Seepage Model of Low-permeability Capillary Bundle

作　　者：胡华君 马铭勖[2] 李光明[2] 

机构地区：[1]中国石油天然气勘探开发公司油气开发部,北京100034 [2]中国石油大学(北京),北京102249

出　　处：《重庆科技学院学报（自然科学版）》2011年第3期93-95,共3页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

摘　　要：近些年来,人们通常用实验的方法研究低渗透油藏的渗流机理。相比而言,低渗透油藏的渗流机理缺乏理论性的研究。将毛细管的视渗透率代入低渗透油藏的渗流方程,分别把流速和启动压力梯度进行叠加,建立了低渗透毛管束单相渗流模型,对低渗透油藏的单相低速渗流进行了理论上的研究,合理解释了渗流曲线发生弯曲的原因,并指出如果某毛细管的启动压力梯度为零,则岩石没有启动压力梯度。In recent years, people have been doing experiments on low-permeability reservoir to study their seepage mechanisms. However, this field is required for more theoretical studies. In this paper, permeability of capillary model is substituted into low-permeability equation and the total flow rate and threshold pressure gradient of the rock are got by superposition method. In the end, the low-permeability capillary model of single phase seepage is Set up. This model gives a theoretical description of low-permeability seepage characteristics. It tells the reason why the seepage curve buckles. Besides, if threshold pressure gradient of one capillary is zero, the threshold pressure gradient of the whole rock will not exist.

关 键 词：低渗透 单相渗流 毛管束 启动压力梯度 

分 类 号：TE311[石油与天然气工程—油气田开发工程]