Geological controls on the occurrence of gas hydrate from core, downhole log, and seismic data in the Shenhu area, South China Sea
文献类型：期刊论文
| 作者 | Wang, Xiujuan1; Collett, Timothy S.2; Lee, Myung W.2; Yang, Shengxiong3; Guo, Yiqun3; Wu, Shiguo1 |
| 刊名 | MARINE GEOLOGY
 |
| 出版日期 | 2014-11-01 |
| 卷号 | 357页码:272-292 |
| 关键词 | Gas hydrate Coarse-grained Thermogenic Geologic controls South China Sea |
| 通讯作者 | Wang, XJ (reprint author), Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China. |
| 英文摘要 | Multi-channel seismic reflection data, well logs, and recovered sediment cores have been used in this study to characterize the geologic controls on the occurrence of gas hydrate in the Shenhu area of the South China Sea. The concept of the "gas hydrate petroleum system" has allowed for the systematic analysis of the impact of gas source, geologic controls on gas migration, and the role of the host sediment in the formation and stability of gas hydrates as encountered during the 2007 Guangzhou Marine Geological Survey Gas Hydrate Expedition (GMGS-1) in the Shenhu area. Analysis of seismic and bathymetric data identified seventeen sub-linear, nearparallel submarine canyons in this area. These canyons, formed in the Miocene, migrated in a northeasterly direction, and resulted in the burial and abandonment of canyons partially filled by coarse-grained sediments. Downhole wireline log (DWL) data were acquired from eight drill sites and sediment coring was conducted at five of these sites, which revealed the presence of suitable reservoirs for the occurrence of concentrated gas hydrate accumulations. Gas hydrate-bearing sediment layers were identified from well log and core data at three sites mainly within silt and silt clay sediments. Gas hydrate was also discovered in a sand reservoir at one site as inferred from the analysis of the DWL data. Seismic anomalies attributed to the presence of gas below the base of gas hydrate stability zone, provided direct evidence for the migration of gas into the overlying gas hydrate-bearing sedimentary sections. Geochemical analyses of gas samples collected from cores confirmed that the occurrence of gas hydrate in the Shenhu area is controlled by the presence thermogenic methane gas that has migrated into the gas hydrate stability zone from a more deeply buried source. (C) 2014 Elsevier B.V. All rights reserved. |
| 学科主题 | Geology; Oceanography |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000346542700021 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/23818]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.US Geol Survey, Denver Fed Ctr, Denver, CO 80225 USA 3.Guangzhou Marine Geol Survey, MLR, Guangzhou 510075, Guangdong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Xiujuan,Collett, Timothy S.,Lee, Myung W.,et al. Geological controls on the occurrence of gas hydrate from core, downhole log, and seismic data in the Shenhu area, South China Sea[J]. MARINE GEOLOGY,2014,357:272-292. |
| APA | Wang, Xiujuan,Collett, Timothy S.,Lee, Myung W.,Yang, Shengxiong,Guo, Yiqun,&Wu, Shiguo.(2014).Geological controls on the occurrence of gas hydrate from core, downhole log, and seismic data in the Shenhu area, South China Sea.MARINE GEOLOGY,357,272-292. |
| MLA | Wang, Xiujuan,et al."Geological controls on the occurrence of gas hydrate from core, downhole log, and seismic data in the Shenhu area, South China Sea".MARINE GEOLOGY 357(2014):272-292. |
入库方式： OAI收割
来源：海洋研究所
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