Coupled effects of stress damage and drilling fluid on strength of hard brittle shale

被引：4

作者：

Wang Wei ^{[1
]}

Deng Jin-gen ^{[1
]}

Yu Bao-hua ^{[1
]}

Zheng Xiao-jin ^{[1
]}

Yan Chuan-liang ^{[1
]}

Deng Yue ^{[1
]}

机构：

[1] China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing 102249, Peoples R China

来源：

JOURNAL OF CENTRAL SOUTH UNIVERSITY | 2016年 / 23卷 / 12期

基金：

中国国家自然科学基金;

关键词：

hard brittle shale; stress damage; drilling fluid; time effect; strength; GRANITE; GROWTH; MODEL; ROCK;

D O I：

10.1007/s11771-016-3391-7

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

During well drilling process, original stress state of hard brittle shale will be changed due to stress redistribution and concentration, which leads to stress damage phenomenon around the borehole. Consequently, drilling fluid will invade into formation along the tiny cracks induced by stress damage, and then weaken the strength of hard brittle shale. Based on this problem, a theoretical model was set up to discuss damage level of shale under uniaxial compression tests using acoustic velocity data. And specifically, considering the coupled effect of stress damage and drilling fluid, the relationship between hard brittle shale strength and elapsed time was analyzed.

引用

页码：3256 / 3261

页数：6