Preliminary Experimental Study of Effect of CO2-H2O Biphasic Fluid on Mechanical Behavior of Sandstone under True Triaxial Compression

doi:10.1061/(ASCE)GM.1943-5622.0001334

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	Preliminary Experimental Study of Effect of CO2-H2O Biphasic Fluid on Mechanical Behavior of Sandstone under True Triaxial Compression
	Zhang, Qiang ; Hu, Shaobin ; Li, Xiaochun ; Shi, Lu
刊名	INTERNATIONAL JOURNAL OF GEOMECHANICS
	2019
卷号	19 期号:2 页码:-
关键词	Geological sequestration CO2-H2O biphasic fluid SEM Microstructure Failure characteristics Integrity of formation
ISSN号	1532-3641
DOI	10.1061/(ASCE)GM.1943-5622.0001334
英文摘要	Understanding the mechanical behavior of a reservoir is essential for securing the safety of CO2 storage projects. In this study, the effect of CO2-H2O biphasic fluid on the mechanical behavior and failure characteristics of sandstone was revealed. The preliminary results indicate that CO2-H2O biphasic fluid could significantly affect the mechanical behavior of sandstone, including reducing the strength, elastic modulus, Poisson's ratio, and bulk modulus of sandstone; enhancing the bulk compaction; and postponing the onset dilatancy of sandstone. However, the strength of water-bearing sandstone is weakly increased when CO2 is injected into the sample due to the capillary forces that develop under the unsaturated conditions. In addition, CO2-H2O biphasic fluid notably affects the failure characteristics of sandstone at macro- and microscales. A complex network of cracks is generated at macrostructure scale. The bonds between particles are damaged by CO2-H2O biphasic fluid at the microstructure scale.
WOS研究方向	Engineering
语种	英语
WOS记录号	WOS:000453210200001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/15065]
专题	岩土力学所知识全产出_期刊论文
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Hohai Univ, Coll Civil Engn & Transportat, Nanjing 210098, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Qiang,Hu, Shaobin,Li, Xiaochun,et al. Preliminary Experimental Study of Effect of CO2-H2O Biphasic Fluid on Mechanical Behavior of Sandstone under True Triaxial Compression[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2019,19(2):-.
APA	Zhang, Qiang,Hu, Shaobin,Li, Xiaochun,&Shi, Lu.(2019).Preliminary Experimental Study of Effect of CO2-H2O Biphasic Fluid on Mechanical Behavior of Sandstone under True Triaxial Compression.INTERNATIONAL JOURNAL OF GEOMECHANICS,19(2),-.
MLA	Zhang, Qiang,et al."Preliminary Experimental Study of Effect of CO2-H2O Biphasic Fluid on Mechanical Behavior of Sandstone under True Triaxial Compression".INTERNATIONAL JOURNAL OF GEOMECHANICS 19.2(2019):-.