裂缝性低渗透油藏的渗吸机理及有利条件  

Mechanisms and optimal conditions of imbibition in naturally fractured low-permeability reservoir

作　　者：姚同玉[1] 李继山[2] 王建[2] 刘卫东[3] 

机构地区：[1]中国石油大学石油工程学院,山东东营257061 [2]胜利油田有限责任公司地质科学研究院,山东东营257015 [3]中国科学院渗流所,河北廊坊065007

出　　处：《吉林大学学报（工学版）》2009年第4期937-940,共4页Journal of Jilin University:Engineering and Technology Edition

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

摘　　要：为了研究渗吸作用的机理及有利条件,通过渗吸实验再现了裂缝性低渗透油藏介质中油水置换过程。实验表明:润湿性是裂缝性低渗透油藏渗吸驱油的主要影响因素之一,故用润湿性因素对渗吸机理判别方程进行了修正。结果表明:修正后的渗吸机理判别方程更适用于油藏介质的实际情况;并以此为基础,研究了裂缝性低渗透油藏介质发生渗吸驱油的充分条件,确定了各个影响因素之间的主次关系,为裂缝性低渗透油藏开发提供了理论依据和设计原则。Experiments were conducted to reveal the mechanisms and identify the optimal conditions of imbibition by reproducing the oil displacement in fractured low-permeability matrix. It is shown that, throughout the spontaneous imbibition process, wettability plays an important role for oil displacement between low-permeability matrix and fracture system. So it is taken into consideration to modify the scaling group for imbibition. The results show that the modified scaling group is more versatile for naturally fractured reservoirs. The order of importance of factors, such as the wettability, interracial tension, gravity and etc. that influence the imbibition and oil displacement efficiency is determined. This provides the theoretical basis and design principles for the development of naturally fractured low-permeability reservoirs.

关 键 词：油气田井开发工程 裂缝性低渗透油藏 渗吸机理 界面张力 润湿性 

分 类 号：TE3[石油与天然气工程—油气田开发工程]