特低渗透砂岩油藏初期含水变化机理实验研究  

THE EXPERIMENT STUDY ON CHANGE MECHANISM OF ORIGINAL WATER-CUT IN EXTRA-LOW PERMEABILITY SANDSTONE RESERVOIR

作　　者：郭龙[1] 

机构地区：[1]中国石油大学石油工程学院

出　　处：《西南石油大学学报（自然科学版）》2008年第4期127-129,共3页Journal of Southwest Petroleum University(Science & Technology Edition)

摘　　要：针对低含油饱和度砂岩油藏开发初期含水现象,以室内物理模拟实验为手段,通过水驱过程中含水饱和度和含水率的变化,研究了特低渗透砂岩油藏的水驱油特征。研究结果表明,特低渗透砂岩油藏的初期含水率是由油藏原始含水饱和度决定的。在低含油饱和度条件下,油藏初始含水率存在一个不为0的稳定波动阶段,并且可以根据室内相对渗透率实验得到的一维含水率曲线和油藏原始含水饱和度来预测油井初期含水率。Through testing the change of water saturation and water-cut,the experiment studies the characteristics of water flooding extra-low permeability sandstone reservoir.The testing reveals that the change of water-cut of low saturation sandstone reservoir consists of three phases,the rapid rising phase,stable fluctuating phase and slow rising phase.And the value of the rapid rising and stable fluctuating phases can be estimated by oil and water relative permeability curve.

关 键 词：特低渗透 初期含水率 物理模拟 原始含水饱和度 变化机理 

分 类 号：TE341[石油与天然气工程—油气田开发工程]