Anisotropic damage model of wellbore cement sheath for underground salt cavern gas storage

doi:10.1016/j.conbuildmat.2021.126284

	Anisotropic damage model of wellbore cement sheath for underground salt cavern gas storage
	He, Tao 4,5; Wang, Tongtao 3,5; Xie, Dongzhou 4,5; Liu, Junhua 2; Daemen, J. J. K.1
刊名	CONSTRUCTION AND BUILDING MATERIALS
	2022-02-21
卷号	320 页码:15
关键词	Underground salt cavern gas storage Completion cement Anisotropy damage Wellbore failure Constitutive equation
ISSN号	0950-0618
DOI	10.1016/j.conbuildmat.2021.126284
英文摘要	Underground salt cavern gas storages have high injection-production efficiency and fast gas injection-delivery switching speed, which has a significant advantage in peak shaving of gas supply. As the weak part of the gas storage wellbore, the cement sheath requires stability analysis. The main motivation for this paper is to propose a model that can characterize the anisotropic damage and use it for cement sheath failure analysis. First, an anisotropic damage evolution model is established based on the principle of thermodynamic irreversibility, and a numerical solution method is given for this model. Then, the model has been verified from three parts: the damage differences in tension and compression and the strengthening effect of confining pressure were verified by mechanical tests; the relationship between anisotropic damage and micro-cracks initiation was verified by test deformation results; a two-stage loading and unloading test was performed to verify the mechanism of anisotropic damage, and the prediction error of cement strength was less than 5%. Based on a user-defined function in the finite element software, the model was developed into a constitutive equation and embedded in the numerical calculation. Finally, the anisotropic damage model is applied to analyze the failure of the cement sheath and to predict the formation of the micro annulus and radial cracks in the wellbore of a gas storage salt cavern. Compared with isotropic damage, the prediction accuracy of the anisotropic damage model for the micro annulus and radial cracks is improved by 50%.
资助项目	National Natural Science Foundation of China[42072307] ; Hubei Province Outstanding Youth Fund[2021CFA095] ; Special Fund for Strategic Pilot Technology of Chinese Academy of Sciences[XDPB21] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDC10020300]
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000742600900001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/30790]
专题	中科院武汉岩土力学所
通讯作者	Wang, Tongtao
作者单位	1.Univ Nevada, Mackay Sch Earth Sci & Engn, Reno, NV 89557 USA 2.PetrolChina, Engn Serv Ctr, Drilling Engn Co BHDC 2, Langfang 065007, Hebei, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, Hubei Key Lab Geoenvironm Engn, Wuhan 430071, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	He, Tao,Wang, Tongtao,Xie, Dongzhou,et al. Anisotropic damage model of wellbore cement sheath for underground salt cavern gas storage[J]. CONSTRUCTION AND BUILDING MATERIALS,2022,320:15.
APA	He, Tao,Wang, Tongtao,Xie, Dongzhou,Liu, Junhua,&Daemen, J. J. K..(2022).Anisotropic damage model of wellbore cement sheath for underground salt cavern gas storage.CONSTRUCTION AND BUILDING MATERIALS,320,15.
MLA	He, Tao,et al."Anisotropic damage model of wellbore cement sheath for underground salt cavern gas storage".CONSTRUCTION AND BUILDING MATERIALS 320(2022):15.