Permeability evolution of defective wellbore cement under geologic carbon sequestration conditions by means of varying-radius pipeline modeling
文献类型：期刊论文
| 作者 | Miao, Xiuxiu1; Gan, Manguang2,3; Wang, Yan2; Zhang, Liwei2,3; Jing, Hongwen1 |
| 刊名 | JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
 |
| 出版日期 | 2022-02-01 |
| 卷号 | 98期号:-页码:- |
| 关键词 | CO2-wellbore cement interaction Varying-radius pipeline model Direct pore-scale model X-ray imaging Geologic carbon sequestration |
| ISSN号 | 1875-5100 |
| 英文摘要 | X-ray imaging in combination with image registration was employed to unveil the microstructure alteration of defective wellbore cement cores when exposed to stagnant or flowing CO2-saturated brine under geologic carbon sequestration conditions. A varying-radius pipeline (VRP) modeling approach is proposed for estimating the permeability alteration from computed tomography (CT) images of artificial channels in the cement cores. The VRP model simplifies the three-dimensional channels into varying-radius pipelines, solves the problem of flow with one-dimensional Navier-Stokes equations, and can readily be coupled with the Cahn-Hilliard equation to address multiphase flow problems. Furthermore, the accuracy of VRP modeling was verified by permeability testing and direct pore-scale modeling. The channel after CO2 exposure in the reactive-diffusion process was covered by substantial precipitation of calcite, and the measured channel permeability decreased by 28.67% from the original value 4.15 x 10(-8) m(2). In contrast, the channel after CO2 exposure in the reactive-flow process underwent significant dissolution, substantial tensile microfractures occurred at channel surface, and the measured channel permeability increased by 8.18% from the original 3.91 x 10(-8) m(2). The CT image-based microstructure investigation implied that when exposed to immobile CO2-saturated brine, even large fluid channels in wellbore cement may be shielded from further degradation; however, when encountering flowing CO2-saturated brine, cement with large fluid channels may fail. The proposed VRP model has the potential to assess field-scale CO2 leakage in wells. |
| 学科主题 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000792616900005 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35240]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu Province, 221116, China 2.State Key Laboratory of Geo-mechanics and Geo-technical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei Province, 430071, China 3.University of Chinese Academy of Sciences, Beijing, 100049, China |
| 推荐引用方式 GB/T 7714 | Miao, Xiuxiu,Gan, Manguang,Wang, Yan,et al. Permeability evolution of defective wellbore cement under geologic carbon sequestration conditions by means of varying-radius pipeline modeling[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2022,98(-):-. |
| APA | Miao, Xiuxiu,Gan, Manguang,Wang, Yan,Zhang, Liwei,&Jing, Hongwen.(2022).Permeability evolution of defective wellbore cement under geologic carbon sequestration conditions by means of varying-radius pipeline modeling.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,98(-),-. |
| MLA | Miao, Xiuxiu,et al."Permeability evolution of defective wellbore cement under geologic carbon sequestration conditions by means of varying-radius pipeline modeling".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 98.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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