IOCAS-IR  > 海洋地质与环境重点实验室
The role of fluid migration in the occurrence of shallow gas and gas hydrates in the south of the Pearl River Mouth Basin, South China Sea
Yang, Jinxiu1,2,3; Wang, Xiujuan2,3; Jin, Jiapeng2,4; Li, Yuanping5; Li, Jie5; Qian, Jin2; Shi, Hesheng5; Zhang, Guangxu2
2017-08-01
Source PublicationINTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION
Volume5Issue:3Pages:SM1-SM11
SubtypeArticle
AbstractHigh-amplitude anomalies (HAAs), bottom-simulating reflectors (BSRs), vertical acoustic blanking features, polygonal faults, and mass transport complexes are observed in high-resolution 3D seismic data from the south of the Pearl River Mouth Basin, South China Sea. We have focused on the role of fluid migration in the occurrence of shallow gas and gas hydrates. HAAs are interpreted to be shallow gas accumulations or gas hydrates, depending on their polarity and the presence of BSRs. Acoustic blanking features are probably caused by the presence of gas chimneys and overlying free gas due to features including chaotic and weak seismic reflections, pull-downs, and long distances of vertical extension. These gas chimneys root into the underlying late Oligocene gas reservoir. There is a close spatial relationship among the gas reservoir, gas chimneys, shallow gas accumulations, and BSRs, suggesting a genetic link. We have developed a schematic model to explain the processes of fluid migration, which supplied gas to the shallow gas accumulations and the gas hydrate system. When the gas reservoir was critically pressured, the focused fluid migration pathways may be formed or be reactivated, and gas was transported vertically along these conduits to the shallow strata. Then, there were two destinies for the migrated gas at shallow depths. One is that gas was trapped below low-permeability seals, such as mudstone or gas hydrates, forming shallow gas accumulations or free gas zones. The other one is that gas entered the gas hydrate stability zone and formed gas hydrates. In addition, this research indicates that the shallow hydrocarbon resource in this area may not be very prolific probably due to limited fluid migration.
DOI10.1190/INT-2016-0197.1
Indexed BySCI
Language英语
WOS IDWOS:000409910400033
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/143172
Collection海洋地质与环境重点实验室
Affiliation1.China Univ Petr East China, Res Inst Unconvent Oil & Gas & Renewable Energy, Qingdao, Peoples R China
2.Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China
4.UCAS, Beijing, Peoples R China
5.China Natl Offshore Oil Corp Ltd, Shenzhen Branch, Guangzhou, Guangdong, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
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GB/T 7714
Yang, Jinxiu,Wang, Xiujuan,Jin, Jiapeng,et al. The role of fluid migration in the occurrence of shallow gas and gas hydrates in the south of the Pearl River Mouth Basin, South China Sea[J]. INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION,2017,5(3):SM1-SM11.
APA Yang, Jinxiu.,Wang, Xiujuan.,Jin, Jiapeng.,Li, Yuanping.,Li, Jie.,...&Zhang, Guangxu.(2017).The role of fluid migration in the occurrence of shallow gas and gas hydrates in the south of the Pearl River Mouth Basin, South China Sea.INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION,5(3),SM1-SM11.
MLA Yang, Jinxiu,et al."The role of fluid migration in the occurrence of shallow gas and gas hydrates in the south of the Pearl River Mouth Basin, South China Sea".INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION 5.3(2017):SM1-SM11.
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