Saline-CO2 Solution Effects on the Mechanical Properties of Sandstones: An Experimental Study
文献类型：期刊论文
| 作者 | Duan, Motao3; Mao, Haijun2; Zhang, Guangquan1; Liu, Junxin3; Zhu, Sinan1; Wang, Di3; Xie, Hao3 |
| 刊名 | APPLIED SCIENCES-BASEL
 |
| 出版日期 | 2025 |
| 卷号 | 15期号:2页码:19 |
| 关键词 | sandstone CO2 solution salinity formula nuclear magnetic resonance (NMR) pore |
| DOI | 10.3390/app15020607 |
| 英文摘要 | In deep brine oil and gas injection-production operations, the combined long-term effects of brine and carbon dioxide on rock mechanical properties are not clear. In order to solve this problem, the influence of long-term salt-CO2 environment on the mechanical properties of sandstone is discussed. The mechanism of interaction evolution and fracture propagation was studied in detail by NMR, the triaxial compression test and a CT scan. The results show that the triaxial compressive strength and mass of sandstone decrease first and then increase with the prolonging of soaking time. The proportion of micropores first decreased and then increased, while the proportion of medium and large pores first increased and then decreased. The pores obtained by Avizo's segmentation of the threshold value of CT sections first increased and then decreased, and the fractal dimensions obtained first increased and then decreased. In particular, the calcium ions in the immersion solution increased first and then decreased. The reaction rate was obtained and verified according to the changes in calcium carbonate mass and calcium ion mineralization at different times. The failure mode of the sample gradually changed from /-shaped failure to V-shaped composite failure, then to local /-shaped failure, and finally to X-shaped composite failure. On this basis, the process of sandstone was divided into the dissolution stage, precipitation stage and secondary dissolution stage, and the rock microstructure change model under a salt-CO2 environment was established. The mechanics, temperature, chemical interaction mechanism and fracture propagation mechanism of sandstone under a salt-CO2 environment are discussed. |
| 资助项目 | Pore pressure growth breeding mechanism and scale effect of high-pile fine tailings under strong seismic load[2024YFFK0415] ; Pore pressure growth breeding mechanism |
| WOS研究方向 | Chemistry ; Engineering ; Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001405777300001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/37341]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Mao, Haijun |
| 作者单位 | 1.China Petr & Chem Corp, China Petr Explorat & Dev Res Inst, Beijing 102206, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Southwest Univ Sci & Technol, Sch Civil Engn & Architecture, Mianyang 621010, Peoples R China |
| 推荐引用方式 GB/T 7714 | Duan, Motao,Mao, Haijun,Zhang, Guangquan,et al. Saline-CO2 Solution Effects on the Mechanical Properties of Sandstones: An Experimental Study[J]. APPLIED SCIENCES-BASEL,2025,15(2):19. |
| APA | Duan, Motao.,Mao, Haijun.,Zhang, Guangquan.,Liu, Junxin.,Zhu, Sinan.,...&Xie, Hao.(2025).Saline-CO2 Solution Effects on the Mechanical Properties of Sandstones: An Experimental Study.APPLIED SCIENCES-BASEL,15(2),19. |
| MLA | Duan, Motao,et al."Saline-CO2 Solution Effects on the Mechanical Properties of Sandstones: An Experimental Study".APPLIED SCIENCES-BASEL 15.2(2025):19. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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