Spatio-temporal evolution of stratigraphic-diffusive methane hydrate reservoirs since the Pliocene along Shenhu continental slope, northern South China sea
文献类型：期刊论文
| 作者 | Guan, Jinan2,3,4,5 ; Cong, Xiaorong2,3,4,5; Archer, David E.1; Wan, Lihua2,3,4,5; Liang, Deqing2,3,4,5
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| 刊名 | MARINE AND PETROLEUM GEOLOGY
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| 出版日期 | 2021-03-01 |
| 卷号 | 125页码:20 |
| 关键词 | Methane hydrate Stratigraphic-diffusive layer Passive continental slope Shenhu area Spatio-temporal evolution Two-dimensional model |
| ISSN号 | 0264-8172 |
| DOI | 10.1016/j.marpetgeo.2020.104864 |
| 通讯作者 | Guan, Jinan(guanja@ms.giec.ac.cn) ; Liang, Deqing(liangdq@ms.giec.ac.cn) |
| 英文摘要 | When biogenic methane produced in marine shallow sediments flows laterally into hydrate stable zones, there is likely to be formation of disperse stratigraphic-diffusive hydrate reservoirs that generally appear thin-bedded and disseminated. The stratigraphic-diffusive layers are also potential industrial exploitation targets because they have moderate abundance, wide distribution, and convenient mining maneuverability. After success of the second trial production in Shenhu area of South China Sea, it is urgent for us to find out the evolution dynamics of the stratigraphic-diffusive hydrate system which is widespread along oceanic continental slopes. Here, the Pearl River Mouth Basin in the northern slope area of South China Sea as a typical passive margin was selected to probe the principles of the accumulation mechanism and distribution pattern of stratigraphic-diffusive methane hydrates, determine the optimal degree of aggregation and spatial extension, and thus evaluate the potential recovery value. Based on the composite stratigraphic sequence, we theoretically described the occurrence characteristics of this type of stratigraphic-diffusive hydrate reservoirs. A two-dimensional model that coupled sedimentation process, fluid flow and reaction kinetics was designed to gauge the influence of engineering geological conditions and other controlling factors since the Pliocene (5.3 Ma) in this system. Several key parameters (including porosity, temperature, salt, and hydrate content) at three different moments, 5 Ma ago, 1.5 Ma ago and at present, were exhibited. The impacts of geothermal gradient and kinetic reaction coefficient on the evolution process were also discussed. Finally, the methane generated from local particulate organic carbons and different start time was used to verify the rationality of this theoretical approach. Our two-dimensional model clearly depicted the occurrence and accumulation characteristics of local stratigraphic-diffusive hydrates, disclosed the exploration value and exhibited the exploitation possibility. |
| WOS关键词 | GAS-HYDRATE ; 2-DIMENSIONAL MODEL ; UNSATURATED FLOW ; QILIAN MOUNTAIN ; STABILITY ZONE ; AREA ; MARGIN ; MIGRATION ; TRANSPORT ; SEDIMENTATION |
| 资助项目 | Natural Science Foundation of Guangdong Province, China[2020A1515011120] ; Science and Technology Planning Project of Guangzhou City, China[201707010252] ; Guangdong Province MED Project, China[GDME-2018D001] ; National Natural Science Foundation of China[41374149] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000613257700001 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | Natural Science Foundation of Guangdong Province, China ; Science and Technology Planning Project of Guangzhou City, China ; Guangdong Province MED Project, China ; National Natural Science Foundation of China |
| 源URL | [http://ir.giec.ac.cn/handle/344007/32680]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Guan, Jinan; Liang, Deqing |
| 作者单位 | 1.Univ Chicago, Dept Geophys, Chicago, IL 60637 USA 2.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 5.Chinese Acad Sci, Key Lab Gas Hydrate, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guan, Jinan,Cong, Xiaorong,Archer, David E.,et al. Spatio-temporal evolution of stratigraphic-diffusive methane hydrate reservoirs since the Pliocene along Shenhu continental slope, northern South China sea[J]. MARINE AND PETROLEUM GEOLOGY,2021,125:20. |
| APA | Guan, Jinan,Cong, Xiaorong,Archer, David E.,Wan, Lihua,&Liang, Deqing.(2021).Spatio-temporal evolution of stratigraphic-diffusive methane hydrate reservoirs since the Pliocene along Shenhu continental slope, northern South China sea.MARINE AND PETROLEUM GEOLOGY,125,20. |
| MLA | Guan, Jinan,et al."Spatio-temporal evolution of stratigraphic-diffusive methane hydrate reservoirs since the Pliocene along Shenhu continental slope, northern South China sea".MARINE AND PETROLEUM GEOLOGY 125(2021):20. |
入库方式： OAI收割
来源：广州能源研究所
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