Evolution of physical and mechanical properties of cementing materials during underground energy exploitation and storage

doi:10.1016/j.est.2021.103775

	Evolution of physical and mechanical properties of cementing materials during underground energy exploitation and storage
	Xu, Feng 3,4; Xu, Zhipeng 3; Tang, Shengchuan 4; Ren, Qingyang 3; Guo, Yintong 2; Wang, Lei 2; Hou, Zhenkun 1; Liu, Zhongshuai 4
刊名	JOURNAL OF ENERGY STORAGE
	2022
卷号	45 页码:8
关键词	Cement stone High temperature Mechanical properties Thermal damage Energy exploitation and storage
DOI	10.1016/j.est.2021.103775
英文摘要	The sealing problem of cement sheath often appears in gas wells for the increasing depth of underground energy exploitation and storage, especially when horizontal multi-stage fracturing technology is used in the shale gas industry. To investigate the effect of high temperature and high pressure (HTHP) on the evolution of the physical and mechanical properties of cement stone, conventional triaxial compression tests of cement stone at 5 different temperatures from 25 degrees C to 135 degrees C, with confining pressure varying from 5 to 45 MPa were tested. It was found that with increasing confining pressure and temperature, the mechanical properties of cement stone change from strain softening to ideal plasticity, finally, become strain hardening. The specimens show irregular longitudinal splitting under low confining pressure and room temperature. When the confining stress rises to 30 MPa and the temperature rises to 95 degrees C, expansive destruction occurs in the radial direction. In addition to the above, the failure mode shows single a shear plane or multiple splitting planes. Peak strength of cement stone is proportional to confining pressure and is inversely related to temperature. There is a negative correlation between elastic modulus and temperature. The effect of temperature on cohesion and friction angle is complex, and with the increasing temperature, the cohesion continuously decreases. The friction angle increases until the temperature reaches 60 degrees C, but then it starts to drop dramatically. The results of the physical and mechanical properties of cement stone guide the cementing design and construction of horizontal wells and the safety evaluation during underground energy exploitation and storage.
资助项目	National Key Research and Development Program of China[2018YFC1504903] ; Chongqing Postdoctoral Science Foundation[cstc2020jcyj-bshX0021] ; China Postdoctoral Science Foundation[2019M662918]
WOS研究方向	Energy & Fuels
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000735329300002
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/30794]
专题	中科院武汉岩土力学所
通讯作者	Ren, Qingyang
作者单位	1.Guangdong Univ Technol, Guangzhou, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan, Peoples R China 3.Chongqing Jiaotong Univ, Sch Civil Engn, Chongqing, Peoples R China 4.China Merchants Chongqing Commun Res & Design Ins, Chongqing, Peoples R China
推荐引用方式 GB/T 7714	Xu, Feng,Xu, Zhipeng,Tang, Shengchuan,et al. Evolution of physical and mechanical properties of cementing materials during underground energy exploitation and storage[J]. JOURNAL OF ENERGY STORAGE,2022,45:8.
APA	Xu, Feng.,Xu, Zhipeng.,Tang, Shengchuan.,Ren, Qingyang.,Guo, Yintong.,...&Liu, Zhongshuai.(2022).Evolution of physical and mechanical properties of cementing materials during underground energy exploitation and storage.JOURNAL OF ENERGY STORAGE,45,8.
MLA	Xu, Feng,et al."Evolution of physical and mechanical properties of cementing materials during underground energy exploitation and storage".JOURNAL OF ENERGY STORAGE 45(2022):8.