Experimental Investigation on the Evolution of Tensile Mechanical Behavior of Cement Stone Considering the Variation of Burial Depth
文献类型：期刊论文
| 作者 | Liu, Bohang1,3; Wang, Lei3; Guo, Yintong3; Li, Jing1; Yang, Hanzhi2 |
| 刊名 | ENERGIES
 |
| 出版日期 | 2022-10-01 |
| 卷号 | 15期号:19页码:- |
| 关键词 | cement stone burial depth high temperature high pressure tensile property roughness microstructure |
| 英文摘要 | The cement sheath is an annular structure between casing and formation, which is crucial to the integrity of the wellbore system. Considering that the temperature and pressure environment is changing continuously with increasing burial depth, the micro-structure and macro=mechanical properties of the in-situ cement sheath will change accordingly. To investigate the variation of burial depth on the evolution of the tensile mechanical behavior of oil cement stone, five temperature-pressure curing and testing conditions (25 degrees C-0 MPa, 50 degrees C-10 MPa, 80 degrees C-20 MPa, 110 degrees C-30 MPa, and 140 degrees C-40 MPa) are set to approximately simulate an in situ temperature-pressure environment at five typical burial depths (0 m, 1000 m, 2000 m, 3000 m, and 4000 m). The in situ tensile behavior, micro-structure and pore size distribution of the cement stones at each condition are tested and comparatively analyzed. Results show that with increasing temperature and pressure, the brittleness of the cement stone reduces and its ductility strengthens accordingly. The tensile strength experiences rapid growth at first, then increases at a slower rate and finally decreases. The failure mode of the cement stone gradually transforms from tensile splitting to tensile-shear composite fracture, accompanied by increasing fracture surface roughness. Microscopically, with increasing curing temperature and pressure, the pore structure of cement stone gradually transforms from closely stacked laminated sheets to interconnected fiber networks. The dense structure of cement stone gradually becomes loose and porous. The porosity also increases from 15.96% to 29.46%. |
| 学科主题 | Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:000868036300001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35224]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.School of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, China 2.State Key Laboratory for Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
| 推荐引用方式 GB/T 7714 | Liu, Bohang,Wang, Lei,Guo, Yintong,et al. Experimental Investigation on the Evolution of Tensile Mechanical Behavior of Cement Stone Considering the Variation of Burial Depth[J]. ENERGIES,2022,15(19):-. |
| APA | Liu, Bohang,Wang, Lei,Guo, Yintong,Li, Jing,&Yang, Hanzhi.(2022).Experimental Investigation on the Evolution of Tensile Mechanical Behavior of Cement Stone Considering the Variation of Burial Depth.ENERGIES,15(19),-. |
| MLA | Liu, Bohang,et al."Experimental Investigation on the Evolution of Tensile Mechanical Behavior of Cement Stone Considering the Variation of Burial Depth".ENERGIES 15.19(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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