Effects of different fluids on microcrack propagation in sandstone under true triaxial loading conditions

doi:10.1002/ghg.1744

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Effects of different fluids on microcrack propagation in sandstone under true triaxial loading conditions
	Hu, Shaobin 1; Li, Xiaochun2 ; Bai, Bing 2
刊名	GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
	2018
卷号	8 期号:2 页码:349-365
关键词	CO2-H2O biphase fluid microcracking mechanism failure pattern triaxial test
ISSN号	2152-3878
DOI	10.1002/ghg.1744
英文摘要	The mechanical behavior of rock under conditions of multiphase fluids is currently a key scientific issue in the field of geotechnical engineering. In this work, we conducted triaxial compression experiments of initially water-saturated samples, which were flooded with CO2 using the semipermeable separator method; comparatively investigated the mechanical behaviors of sandstone under the conditions of mono-phase fluids CO2/N-2/H2O and biphase fluid CO2-H2O; and analyzed the stress-strain characteristics, internal crack expansion, and macrocrack failure patterns of sandstones. Compared with H2O, CO2 and N-2 could lead sandstone cracks to show a pattern of multiple fractures, displaying a double shear failure mode and multiple branch cracks along principal fractures. Moreover, the cracking effect of supercritical CO2 was more evident. Under the conditions of pore pressure of 10MPa and temperature of 323 K, the ratio of work done by CO2, N-2 and H2O during crack expansion was 23.5:24.1:1, with transient pressure drops to 7.82 MPa, 9.25 MPa, and 0.1 MPa, respectively. Overall, the study analyzed the mechanisms of physicochemical interactions of fluid types and the number of phases in sandstone minerals at the microscale and revealed the mechanical mechanism between fluids and rock minerals, as well as the impacts of these fluids on the strength, internal crack expansion and deformation of sandstone. (c) 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.
WOS研究方向	Energy & Fuels ; Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	WILEY PERIODICALS, INC
WOS记录号	WOS:000429709900012
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4258]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	1.HoHai Univ, Tunnel & Underground Engn Inst, Coll Civil & Transportat Engn; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn
推荐引用方式 GB/T 7714	Hu, Shaobin,Li, Xiaochun,Bai, Bing. Effects of different fluids on microcrack propagation in sandstone under true triaxial loading conditions[J]. GREENHOUSE GASES-SCIENCE AND TECHNOLOGY,2018,8(2):349-365.
APA	Hu, Shaobin,Li, Xiaochun,&Bai, Bing.(2018).Effects of different fluids on microcrack propagation in sandstone under true triaxial loading conditions.GREENHOUSE GASES-SCIENCE AND TECHNOLOGY,8(2),349-365.
MLA	Hu, Shaobin,et al."Effects of different fluids on microcrack propagation in sandstone under true triaxial loading conditions".GREENHOUSE GASES-SCIENCE AND TECHNOLOGY 8.2(2018):349-365.