The mechanism of pores enhancing the deformation of completion cement under confining pressure
文献类型：期刊论文
| 作者 | He, Tao2,3; Wang, Tongtao3; Xie, Dongzhou2,3; Daemen, J. J. K.1 |
| 刊名 | CEMENT & CONCRETE COMPOSITES
 |
| 出版日期 | 2022 |
| 卷号 | 125页码:15 |
| ISSN号 | 0958-9465 |
| 关键词 | Anisotropic damage Cement with pores Gas storage wellbore Large deformation Interface failure |
| DOI | 10.1016/j.cemconcomp.2021.104322 |
| 英文摘要 | As a porous material, the strength and deformation characteristics of cement after well-completion are related to internal pores. This article describes a damage law of cement with pores. The damage law was applied to a damage response analysis of a gas storage salt cavern wellbore during the service period. The damage is caused by two aspects: the initial isotropic damage caused by the primary pores, and the subsequent anisotropic damage caused by the secondary micro-cracks in the matrix. It is necessary to establish a damage evolution model including the effects of pores and micro-cracks. Triaxial compression tests are performed on two sets of cement samples with and without pores to verify the model. By user programmable features (UPFs) in the finite element software ANSYS, the damage constitutive equation is embedded in a numerical calculation. According to the structure and load parameters of a salt cavern in Jintan, a wellbore model with porous cement sheath was established for engineering application. The following conclusions are obtained through experiments and numerical calculations: the pores reduce the strength of cement under low confining pressure but increase the deformability under high confining pressure. If there are no pores in the cement sheath, high damage areas are easily formed at the internal interface. When the porosity becomes 5%, the radial deformation ability is enhanced, and the interface is not easy to debond. However, when the porosity increases to 7.5%, the radial micro-cracks between the pores are formed, resulting in radial destruction. |
| 资助项目 | National Natural Science Foundation of China[42072307] ; Foundation for Innovative Research Groups of the National Natural Science Foundation of China[51621006] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDC10020300] |
| WOS研究方向 | Construction & Building Technology ; Materials Science |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:000720833400001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/28282]  |
| 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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.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. The mechanism of pores enhancing the deformation of completion cement under confining pressure[J]. CEMENT & CONCRETE COMPOSITES,2022,125:15. |
| APA | He, Tao,Wang, Tongtao,Xie, Dongzhou,&Daemen, J. J. K..(2022).The mechanism of pores enhancing the deformation of completion cement under confining pressure.CEMENT & CONCRETE COMPOSITES,125,15. |
| MLA | He, Tao,et al."The mechanism of pores enhancing the deformation of completion cement under confining pressure".CEMENT & CONCRETE COMPOSITES 125(2022):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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