A brittleness index evaluation method for weak-brittle rock by acoustic emission technique

脆性 声发射 压力(语言学) 岩土工程 覆岩压力 消散 断裂(地质) 岩石力学 人口 材料科学 地质学 复合材料 物理 哲学 人口学 社会学 热力学 语言学
作者
Xian Shi,Min Wang,Zhixuan Wang,Yingwei Wang,Shuangfang Lu,Weichao Tian
出处
期刊:Journal of Natural Gas Science and Engineering [Elsevier]
卷期号:95: 104160-104160 被引量:20
标识
DOI:10.1016/j.jngse.2021.104160
摘要

Brittleness is a significant indicator of a series of engineering problems in the oil and gas community. However, the majority of brittleness evaluation methods focus on brittle rock, but few pay much attention to weak-brittle rock. In this study, an attempt has been made to study the relationship between released acoustic emission (AE) energy and brittleness during the fracture process of rock samples. An accumulative acoustic energy-based brittleness evaluation method was proposed according to the energy accumulation and dissipation in the pre-peak and post-peak stages. Moreover, the suitability and reliability of this method was verified by tri-axial compression tests on shale, tight sandstone, and glutenite. The experimental results indicate that both the complete stress vs. strain brittleness method and the accumulative acoustic energy-based brittleness method can reflect the effect of confining pressure, but deformation and failure characteristics that transition from brittle to weak-brittle behaviors with increasing confining pressure make the post-peak feature difficult to distinguish. Thus, the conventional complete stress vs. strain brittleness method fails to determine brittleness. However, the accumulative acoustic energy-based brittleness evaluation method is more sensitive to rock failure, even if the rock is weak-brittle or ductile, while acoustic energy can be directly monitored rather than calculated by a mathematical model. Thus, the accuracy of brittleness evaluation can be improved. The good match between the fracture morphology and accumulative acoustic energy-based brittleness results demonstrate that this novel method is more suitable for brittleness evaluation in weak-brittle or even ductile rock; therefore, this brittleness method can be efficiently used in deep formations under high-confining pressure, benefitting various engineering applications.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
慕暖完成签到,获得积分10
1秒前
wanfeng发布了新的文献求助10
1秒前
1秒前
志哥完成签到,获得积分10
2秒前
2秒前
ya发布了新的文献求助10
3秒前
SciGPT应助eerrttyyuu采纳,获得10
3秒前
5秒前
5秒前
5秒前
慕暖发布了新的文献求助30
6秒前
志哥发布了新的文献求助10
6秒前
bonjour发布了新的文献求助10
7秒前
Lijunjie发布了新的文献求助10
8秒前
8秒前
黑黑黑发布了新的文献求助10
9秒前
丰富梦容发布了新的文献求助10
11秒前
12秒前
fighting发布了新的文献求助10
14秒前
Singularity应助ya采纳,获得10
14秒前
lyx发布了新的文献求助10
16秒前
16秒前
16秒前
胡桃完成签到,获得积分20
18秒前
wanfeng发布了新的文献求助10
19秒前
兔子吃胡萝卜完成签到,获得积分10
21秒前
21秒前
25秒前
25秒前
Jasper应助JIE采纳,获得10
26秒前
黑黑黑发布了新的文献求助30
26秒前
执着的海冬完成签到,获得积分10
28秒前
sun完成签到,获得积分10
28秒前
29秒前
思源应助丰富梦容采纳,获得10
30秒前
fighting完成签到,获得积分10
30秒前
失眠的问梅完成签到,获得积分10
30秒前
30秒前
聖璕完成签到,获得积分10
31秒前
32秒前
高分求助中
中国国际图书贸易总公司40周年纪念文集 大事记1949-1987 2000
TM 5-855-1(Fundamentals of protective design for conventional weapons) 1000
草地生态学 880
Threaded Harmony: A Sustainable Approach to Fashion 799
Basic Modern Theory of Linear Complex Analytic 𝑞-Difference Equations 510
Queer Politics in Times of New Authoritarianisms: Popular Culture in South Asia 500
Livre et militantisme : La Cité éditeur 1958-1967 500
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3058813
求助须知:如何正确求助?哪些是违规求助? 2714822
关于积分的说明 7442467
捐赠科研通 2360145
什么是DOI,文献DOI怎么找? 1250625
科研通“疑难数据库(出版商)”最低求助积分说明 607487
版权声明 596432