Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Unscrambling the source kitchen and hydrocarbon prospect information of the ultra-deepwater area in southern Pearl River Mouth basin, South China Sea: Insights from the first ultra-deepwater exploration well W21 | |
Yang, Chao1,2; Liu, Lihua1; Wu, Daidai1 ; Jiang, Wenmin2,3; Li, Yun2,3; Xiong, Yongqiang2,3
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| 2022-09-01 | |
| Source Publication | JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
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| ISSN | 0920-4105 |
| Volume | 216Pages:19 |
| Corresponding Author | Yang, Chao(yangchao@ms.giec.ac.cn) |
| Abstract | Recent breakthroughs in Pearl River Mouth basin (PRMB) regarding offshore hydrocarbon exploration have shifted the focus from deepwater area to ultra-deepwater area (> 1500 m water depth), and the southern sub-sag of Baiyun sag, Liwan sag, and the Shunhe Uplift between them constitute the front area for PRMB ultra-deepwater hydrocarbon exploration. This study investigated the source-rock strata (i.e., Eocene Wenchang Formation and Enping Formation) and reservoir fluids (mainly CO2 with small amounts of oil and alkane gas) in the first exploratory well (namely W21, drilled at Shunhe Uplift), aiming to unscramble the source kitchen and hydrocarbon prospect information in this ultra-deepwater area. Biomarker and transgressive history analysis of source-rock strata jointly determined the Wenchang Formation and Enping Formation to be marine sediments in the Liwan sag, while marine and lacustrine sediments in the Baiyun southern sub-sag, respectively. The oil biomarkers and isotopes of alkane gas evidenced prospect for mature oil and oil-associated gas in this ultra-deepwater area, and the correlated source analysis determined the source rocks in the two sags have an advantage of aquatic organic input, indicating a good hydrocarbon-generating potential. Additionally, the regional distribution of terrestrial source-specific biomarkers (i.e., oleanane and bicadinanes) in PRMB deep to ultra-deep water areas traced the terrestrial source area and revealed a significant less input of terrigenous organic matter at the two ultra-deepwater sags. The isotopic analysis of reservoir non-hydrocarbon gases determined the CO2 to be mantle-derived magmatic origin. The present reservoirs are a result of displacement of early charged oils by posterior migrated CO2. In conclusion, this PRMB ultra-deepwater area has a considerable prospect for mature oil; however, the frequent volcanism since the Pliocene poses great risks to hydrocarbon exploration. |
| Keyword | Pearl River Mouth basin Ultra-deepwater area Source kitchen Hydrocarbon prospect Organic input Hydrocarbon -containing CO2 reservoirs |
| DOI | 10.1016/j.petrol.2022.110827 |
| WOS Keyword | NORTHERN CONTINENTAL-MARGIN ; PRISTANE PHYTANE RATIO ; NATURAL GASES ; BAIYUN SAG ; CRUDE OILS ; GEOCHEMICAL CHARACTERISTICS ; TECTONIC EVOLUTION ; CARBON-DIOXIDE ; SOURCE ROCKS ; HUILU AREA |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Science and Technology Major Projects[2016ZX05026-003-006] ; Natural Science Foundation of Guangdong Province[2018A030313234] ; National Natural Science Foundation of China[41802165] ; Shenzhen Branch of China National Offshore Oil Corporation Ltd |
| WOS Research Area | Energy & Fuels ; Engineering |
| Funding Organization | National Science and Technology Major Projects ; Natural Science Foundation of Guangdong Province ; National Natural Science Foundation of China ; Shenzhen Branch of China National Offshore Oil Corporation Ltd |
| WOS Subject | Energy & Fuels ; Engineering, Petroleum |
| WOS ID | WOS:000830353000002 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/37005 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Yang, Chao |
| Affiliation | 1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Nat Gas Hydrate, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China |
| First Author Affilication | GuangZhou Institute of Energy Conversion,Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Yang, Chao,Liu, Lihua,Wu, Daidai,et al. Unscrambling the source kitchen and hydrocarbon prospect information of the ultra-deepwater area in southern Pearl River Mouth basin, South China Sea: Insights from the first ultra-deepwater exploration well W21[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2022,216:19. |
| APA | Yang, Chao,Liu, Lihua,Wu, Daidai,Jiang, Wenmin,Li, Yun,&Xiong, Yongqiang.(2022).Unscrambling the source kitchen and hydrocarbon prospect information of the ultra-deepwater area in southern Pearl River Mouth basin, South China Sea: Insights from the first ultra-deepwater exploration well W21.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,216,19. |
| MLA | Yang, Chao,et al."Unscrambling the source kitchen and hydrocarbon prospect information of the ultra-deepwater area in southern Pearl River Mouth basin, South China Sea: Insights from the first ultra-deepwater exploration well W21".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 216(2022):19. |
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