Numerical Study of Long-Term Natural Gas Production of Hydrate Composite Reservoirs in the South China Sea by Depressurization Using Horizontal Wells
文献类型：期刊论文
| 作者 | Luo, Tingting3; Ma, Chaozheng3; Chen, Yulu3; Song, Jianlin3; Wang, Ziding3; Yan, Hongji3; Kang, Hongkai3; Li, Zhengrong3; Sun, Xiang2; Song, Yongchen1 |
| 刊名 | ENERGY & FUELS
 |
| 出版日期 | 2025-01-23 |
| 卷号 | 39期号:5页码:2568-2583 |
| ISSN号 | 0887-0624 |
| DOI | 10.1021/acs.energyfuels.4c05500 |
| 英文摘要 | The South China Sea (SCS) holds abundant natural gas hydrate resources. Results from the second trial production project have confirmed the high development potential of clayey-silty composite reservoirs, which consist of the hydrate layers, the mixed layers, and the gaseous hydrocarbon layer from top to bottom, and demonstrated the wide applicability of the depressurization method and horizontal well technology. Investigating the evolution of these composite reservoirs under natural gas production using the depressurization method and horizontal wells is critical for advancing the commercial viability of natural gas hydrates in the SCS. In response, this study combines geological data from the second trial production site in the SCS with laboratory mechanical data, employing COMSOL MULTIPHYSICS software to model the production process in natural gas hydrate composite reservoirs using horizontal wells. This model comprehensively simulates gas and water production trends, along with the evolution of physical fields within the reservoir, over a three-year depressurization period. The research findings indicate the following: (1) In the initial production phase, gas production rapidly rises to 5.61 x 104 m3/day and then declines continuously, stabilizing around 0.65 x 104 m3/day, while water production consistently increases. (2) Hydrate dissociation is concentrated primarily near the wellbore, with significant changes in hydrate saturation and pore pressure. Due to permeability differences, the mixed layer shows a more pronounced variation, while the hydrate layer remains relatively stable. (3) A reduction in pore pressure initiates stress reorganization within the reservoir, producing significant stress concentration around the wellbore. Here, the Von Mises stress and mean effective stress are markedly higher than in the far-field regions, creating a persistent stress concentration zone that has critical implications for reservoir stability. (4) Long-term hydrate production induces notable deformation in strata surrounding the horizontal well, with the most pronounced deformation observed in the hydrate layer above the well and the overlying layer. Maximum deformation reaches 6.2 m, exhibiting a "U"-shaped downward trend toward the seabed. The results of this study are expected to provide support for understanding the evolution of clayey-silty composite reservoirs during the long-term production of natural gas hydrates. |
| 资助项目 | National Natural Science Foundation of China[42106210] ; National Natural Science Foundation of China |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001406196100001 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/37577]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Luo, Tingting |
| 作者单位 | 1.Dalian Univ Technol, Key Lab Ocean Energy Utilizat & Energy Conservat, Minist Educ, Dalian 116024, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan 430071, Peoples R China 3.China Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Intelligent Construct & Hlth Operat, Xuzhou 221116, Peoples R China |
| 推荐引用方式 GB/T 7714 | Luo, Tingting,Ma, Chaozheng,Chen, Yulu,et al. Numerical Study of Long-Term Natural Gas Production of Hydrate Composite Reservoirs in the South China Sea by Depressurization Using Horizontal Wells[J]. ENERGY & FUELS,2025,39(5):2568-2583. |
| APA | Luo, Tingting.,Ma, Chaozheng.,Chen, Yulu.,Song, Jianlin.,Wang, Ziding.,...&Yang, Weihao.(2025).Numerical Study of Long-Term Natural Gas Production of Hydrate Composite Reservoirs in the South China Sea by Depressurization Using Horizontal Wells.ENERGY & FUELS,39(5),2568-2583. |
| MLA | Luo, Tingting,et al."Numerical Study of Long-Term Natural Gas Production of Hydrate Composite Reservoirs in the South China Sea by Depressurization Using Horizontal Wells".ENERGY & FUELS 39.5(2025):2568-2583. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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