A 3D basin modeling study of the factors controlling gas hydrate accumulation in the Shenhu Area of the South China Sea
ABSTRACT: Great advancement has been made on natural gas hydrates exploration and test production in the northern South China Sea. However, there remains a lot of key questions yet to be resolved, particularly about the mechanisms and the controls of gas hydrates enrichment. Numerical simulaution wo...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2022-04-01
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| Series: | China Geology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2096519222001136 |
| _version_ | 1811170494671486976 |
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| author | Zhi-yuan Xie Jian-gong Wei Jin-yun Zheng Zhen Sun Kun Zhang |
| author_facet | Zhi-yuan Xie Jian-gong Wei Jin-yun Zheng Zhen Sun Kun Zhang |
| author_sort | Zhi-yuan Xie |
| collection | DOAJ |
| description | ABSTRACT: Great advancement has been made on natural gas hydrates exploration and test production in the northern South China Sea. However, there remains a lot of key questions yet to be resolved, particularly about the mechanisms and the controls of gas hydrates enrichment. Numerical simulaution would play signficant role in addressing these questions. This study focused on the gas hydrate exploration in the Shenhu Area, Northern South China Sea. Based on the newly obtained borehole and multichannel reflection seismic data, the authors conducted an integrated 3D basin modeling study on gas hydrate. The results indicate that the Shenhu Area has favorable conditions for gas hydrate accumulation, such as temperature, pressure, hydrocarbon source, and tectonic setting. Gas hydrates are most concentrated in the Late Miocene strata, particularly in the structual highs between the Baiyun Sag and the Liwan Sag, and area to the south of it. It also proved the existence of overpressure in the main sag of source rocks, which was subject to compaction disequilibrium and hydrocarbon generation. It also shown that the regional fault activity is not conducive to gas hydrate accumulation due to excess gas seepage. The authors conjecture that fault activity may slightly weaken overpressure for the positive effect of hydrocarbon expulsion and areas lacking regional fault activity have better potential.©2022 China Geology Editorial Office. |
| first_indexed | 2024-04-10T16:57:31Z |
| format | Article |
| id | doaj.art-7bb824204e1146faad0610ae22b4831e |
| institution | Directory Open Access Journal |
| issn | 2096-5192 |
| language | English |
| last_indexed | 2024-04-10T16:57:31Z |
| publishDate | 2022-04-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | China Geology |
| spelling | doaj.art-7bb824204e1146faad0610ae22b4831e2023-02-07T04:22:53ZengKeAi Communications Co., Ltd.China Geology2096-51922022-04-0152218233A 3D basin modeling study of the factors controlling gas hydrate accumulation in the Shenhu Area of the South China SeaZhi-yuan Xie0Jian-gong Wei1Jin-yun Zheng2Zhen Sun3Kun Zhang4Guangzhou Marine Geological Survey, China Geological Survey, Ministry of Natural Resources, Guangzhou 510760, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China; Sanya Institute of South China Sea Geology, Guangzhou Marine Geological Survey, Sanya 572025, China; First author: E-mail address: xiezhiyuan1990@hotmail.com (Zhi-yuan Xie).Guangzhou Marine Geological Survey, China Geological Survey, Ministry of Natural Resources, Guangzhou 510760, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China; Sanya Institute of South China Sea Geology, Guangzhou Marine Geological Survey, Sanya 572025, China; Corresponding author: E-mail address: weijiangong007@163.com (Jian-gong Wei).China National Offshore Oil Corporation Ltd.-Shenzhen, Shenzhen 518054, ChinaSouthern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China; Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, ChinaState Key Laboratory of Marine Geology, School of Ocean and Earth Science, Tongji University, Shanghai 200092, ChinaABSTRACT: Great advancement has been made on natural gas hydrates exploration and test production in the northern South China Sea. However, there remains a lot of key questions yet to be resolved, particularly about the mechanisms and the controls of gas hydrates enrichment. Numerical simulaution would play signficant role in addressing these questions. This study focused on the gas hydrate exploration in the Shenhu Area, Northern South China Sea. Based on the newly obtained borehole and multichannel reflection seismic data, the authors conducted an integrated 3D basin modeling study on gas hydrate. The results indicate that the Shenhu Area has favorable conditions for gas hydrate accumulation, such as temperature, pressure, hydrocarbon source, and tectonic setting. Gas hydrates are most concentrated in the Late Miocene strata, particularly in the structual highs between the Baiyun Sag and the Liwan Sag, and area to the south of it. It also proved the existence of overpressure in the main sag of source rocks, which was subject to compaction disequilibrium and hydrocarbon generation. It also shown that the regional fault activity is not conducive to gas hydrate accumulation due to excess gas seepage. The authors conjecture that fault activity may slightly weaken overpressure for the positive effect of hydrocarbon expulsion and areas lacking regional fault activity have better potential.©2022 China Geology Editorial Office.http://www.sciencedirect.com/science/article/pii/S20965192220011363D basin modelingGas hydratesFault reactivationOverpressureGas seepageHeat flow |
| spellingShingle | Zhi-yuan Xie Jian-gong Wei Jin-yun Zheng Zhen Sun Kun Zhang A 3D basin modeling study of the factors controlling gas hydrate accumulation in the Shenhu Area of the South China Sea China Geology 3D basin modeling Gas hydrates Fault reactivation Overpressure Gas seepage Heat flow |
| title | A 3D basin modeling study of the factors controlling gas hydrate accumulation in the Shenhu Area of the South China Sea |
| title_full | A 3D basin modeling study of the factors controlling gas hydrate accumulation in the Shenhu Area of the South China Sea |
| title_fullStr | A 3D basin modeling study of the factors controlling gas hydrate accumulation in the Shenhu Area of the South China Sea |
| title_full_unstemmed | A 3D basin modeling study of the factors controlling gas hydrate accumulation in the Shenhu Area of the South China Sea |
| title_short | A 3D basin modeling study of the factors controlling gas hydrate accumulation in the Shenhu Area of the South China Sea |
| title_sort | 3d basin modeling study of the factors controlling gas hydrate accumulation in the shenhu area of the south china sea |
| topic | 3D basin modeling Gas hydrates Fault reactivation Overpressure Gas seepage Heat flow |
| url | http://www.sciencedirect.com/science/article/pii/S2096519222001136 |
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