基于随机孔隙网络模拟的渗透率应力敏感机理  

Mechanism of Permeability Stress Sensitivity Based on Random Pore Network Simulation

作　　者：阳建平[1,2] 刘志斌[1] 喻晓琳[3] 陶正武[2] 徐鹏[4] 李志强[1] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500 [2]中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000 [3]中国石油长庆油田分公司勘探开发研究院,西安710018 [4]长江大学石油工程学院,武汉430100

出　　处：《吉林大学学报（地球科学版）》2017年第2期626-632,共7页Journal of Jilin University：Earth Science Edition

基　　金：国家重点基础研究发展计划("973"计划)项目(2015CB250902);油气藏地质及开发工程国家重点实验室开放式基金项目(PLN1129)~~

摘　　要：储层岩石物性应力敏感研究主要停留在实验测试与数据处理方法上,无法通过单一形状孔隙的理论模型从机理上得到解释;因此,本研究基于随机孔隙网络模型实现渗透率应力敏感感机理解释。以逾渗理论、水电相似原理、Kirchoff定律为理论基础,采用迭代法,基于QT Creator平台编程生成了三维随机孔隙网络模型,并对无因次半径与有效应力的关系进行了模拟。模拟结果表明:纵横比越小,无因次半径受到有效应力的影响越明显。因此,通过网络模型建立渗透率与有效应力关系,能够实现渗透率应力敏感的机理解释。Since the study of the reservoir rock physical property stress sensitivity mainly focus on the test and data processing method,and can＇t be explained on mechanism via the single shape pore theory model so far,the random pore network simulations are proposed for the rock physical property stress sensitivity mechanism explanation in the paper.Based on percolation theory,similarity principleof water and electricity,Kirchoff law,three dimensional random pore network model using iteration method is generated programmatically based on the QT Creator platform.The relationship of experiment dimensionless radius and the effective stress is simulated,and the simulation results show that smaller the aspect ratio is,the more obvious the dimensionless radius responds to the stress effect.Thus permeability stress sensitivity mechanism explanation is realized based on the relation of permeability and effective stress established using the network simulation method.

关 键 词：网络模型 有效应力 应力敏感 

分 类 号：TE311[石油与天然气工程—油气田开发工程]