Migration of methane associated with gas hydrates of the Shenhu Area, northern slope of South China Sea
文献类型：期刊论文
| 作者 | Yang, Rui; Su, Ming; Qiao, Shaohua; Cong, Xiaorong; Su, Zheng; Liang, Jinqiang; Wu, Nengyou |
| 刊名 | MARINE GEOPHYSICAL RESEARCH
 |
| 出版日期 | 2015 |
| 卷号 | 36期号:2-3页码:253-261 |
| 关键词 | Shenhu Area Gas hydrate Gas chimney AVO analysis Instantaneous frequency |
| 通讯作者 | yangruicn@qq.com ; wuny@ms.giec.ac.cn |
| 中文摘要 | Shenhu Area is located in the northern slope region of the South China Sea. Pre-drilling reservoir prediction by the analysis of both 2D and 3D seismic data indicates the presence of hydrate-bearing sediments of approximately 70 m thickness. Data also suggests a strong spatial correlation between gas hydrates and gas chimneys. Evidence suggests that these gas chimneys created pathways for the migration of gas and fluids into the gas hydrate stability zone (GHSZ). In this study, we analyze reflection seismic data collected in the vicinity of a well where an abundance of gas hydrate is known to exist. Between the base of the gas hydrate stability zone and the top of the gas chimney, a thin layer of fine grained sediments is observed. A number of small faults (and possibly additional micro-fractures) breach the stratum and connect the gas chimney and GHSZ directly. Fluids, including free gas, may migrate upwards through these fractures. Additionally, small faults within the flanks of the gas chimney may effectively promote gas migration to the GHSZ. Amplitude variation with offsets analysis and instantaneous frequency analysis provided evidences of fluid pathways. A low-frequency anomaly over the center of the gas chimney indicates high seismic attenuation. This is interpreted to be caused by the migration of fluids (probably methane). Based on the results of this study, we propose an exploration for the origin of formation of Shenhu Area gas hydrate formation through the migration of methane. |
| 学科主题 | Geochemistry & Geophysics; Oceanography |
| 收录类别 | SCI |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/15043]  |
| 专题 | 南海海洋研究所_热带海洋环境国家重点实验室(LTO) |
| 推荐引用方式 GB/T 7714 | Yang, Rui,Su, Ming,Qiao, Shaohua,et al. Migration of methane associated with gas hydrates of the Shenhu Area, northern slope of South China Sea[J]. MARINE GEOPHYSICAL RESEARCH,2015,36(2-3):253-261. |
| APA | Yang, Rui.,Su, Ming.,Qiao, Shaohua.,Cong, Xiaorong.,Su, Zheng.,...&Wu, Nengyou.(2015).Migration of methane associated with gas hydrates of the Shenhu Area, northern slope of South China Sea.MARINE GEOPHYSICAL RESEARCH,36(2-3),253-261. |
| MLA | Yang, Rui,et al."Migration of methane associated with gas hydrates of the Shenhu Area, northern slope of South China Sea".MARINE GEOPHYSICAL RESEARCH 36.2-3(2015):253-261. |
入库方式： OAI收割
来源：南海海洋研究所
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