岩土力学2018，Vol.39Issue(3)：797-802,6.DOI:10.16285/j.rsm.2016.0766
超临界CO2作用下页岩力学特性损伤的试验研究
Experimental study of damage of shale mechanical properties under supercritical CO2
摘要
Abstract
With the growing demand of clean energy,much attention has been paid to the supercritical CO2 strengthened shale gas development technology.This paper aims to investigate the effect of supercritical CO2 on the mechanical properties of the shale.Supercritical CO2 immersion experiments were carried out on the Silurian shale from Sichuan Basin Longmaxi for different durations.Besides,indirect tension tests (i.e.,Brazilian disc tests) and triaxial compression tests were conducted to obtain the variation regularities of the strength and deformation of shale before and after immersion.Combing with the results of XRD,porosity and SEM tests,the effect of supercritical CO2 on the mechanical properties of shale was preliminarily discussed.The results showed that after supercritical CO2 immersion,the tensile strength,triaxial compressive strength,and elastic modulus (Young's Modulus) of the shale all decreased at various degrees.However,the amount of shale strength loss increased with increasing the immersion time.Meanwhile,XRD,porosity tests and SEM results indicated that supercritical CO2 degraded mechanical properties of shale by changing the structure of mineral constituent,reducing the degree of cementation,and changing the particle framework and pore structure.关键词
岩石力学/页岩/超临界CO2/力学特性/损伤Key words
rock mechanics/shale/supercritical CO2/mechanical properties/damage分类
建筑与水利引用本文复制引用
汤积仁,卢义玉,陈钰婷,张欣玮,敖翔,贾云中,李倩..超临界CO2作用下页岩力学特性损伤的试验研究[J].岩土力学,2018,39(3):797-802,6.基金项目
国家自然科学基金青年基金项目(No.51404045) （No.51404045）
国家重点基础研究发展计划资助(No.2014CB239206) （No.2014CB239206）
长江学者和创新团队发展计划资助(No.IRT17R112).This work was supported by National Natural Science Foundation of China (NSFC) (51404045),the National Key Basic Research Program of China (2014CB239206) and the Program for Changjiang Scholars and Innovative Research Team in University (IRT17R112). （No.IRT17R112）
