Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Geochemical characteristics and possible sources of crude oils in the Baiyun deep-water area of the Pearl River Mouth Basin, South China Sea | |
| Jiang, Wenmin1,2; Chen, Cong3; Long, Zulie3; Li, Yun1,2; Yang, Chao1,4; Xiong, Yongqiang1,2 | |
| 2022 | |
| Source Publication | MARINE AND PETROLEUM GEOLOGY
 |
| ISSN | 0264-8172 |
| Volume | 135Pages:14 |
| Corresponding Author | Li, Yun(liyun@gig.ac.cn) |
| Abstract | Two classification methods, the distribution of biomarkers and the alternating least squares (ALS) chemometric analysis were used to investigate the genetic characteristics of oils collected from the Baiyun deep-water area of the Pearl River Mouth Basin in the South China Sea. Results of the two methods were generally consistent that most of the oils were originated from the shallow lacustrine source rocks, but oils from the West Sub-Sag (WSS) and the South Sub-Sag (SSS) have a distinct geochemical characteristic with low abundances of bicadinanes and oleanane, and relatively lighter delta C-13 value (<-28.0 parts per thousand). The ALS chemometric analysis can quantitatively determine the sources of the oils. It shows that mixing has commonly occurred between the oils, and three end-member oils were identified (i.e., EM1, EM2, and EM3), which were derived from the semideep-deep Wenchang Formation source rocks that are characterized by a predominance of C-27 steranes and low concentrations of bicadinanes and oleanane, the shallow lacustrine Enping Formation source rocks in the Main Sub-Sag (MSS) that are rich in bicadinanes but depleted in oleanane, and the shallow lacustrine Wenchang and/or Enping formations source rocks in the East Sub-Sag (ESS) that have a relatively high abundance of bicadinanes, a moderate content of oleanane, and a predominance of C-29 steranes, respectively. The oils from the Panyu Low Uplift (PLU) are dominated by 83% of EM2 oil. Oils from the SSS and WSS are dominated by EM1 oil (68.0%-93.1%). Oils from the ESS and eastern part of the MSS (E-MSS) are mixed oils consisting mainly of EM2 and EM3 oil, with an increasing proportion of EM3 moving from the E-MSS to central ESS. The maturity of the oils was assessed based on diamondoid indices, and oils from the PLU have the highest maturities (1.43%-1.59% Rc), whereas oils from the SSS have the lowest maturities (1.23%-1.25% Rc), corresponding to the different maturities of their source rocks. The semideep-deep lacustrine oils discovered in the WSS and SSS highlight the hydrocarbon generation potential of these types of source rocks in the Wenchang Formation, where further oil exploration should be focused. |
| Keyword | Crude oils Biomarkers Alternating least squares chemometric analysis Diamondoids Maturity Baiyun sag |
| DOI | 10.1016/j.marpetgeo.2021.105410 |
| WOS Keyword | PRISTANE PHYTANE RATIO ; DEPOSITIONAL ENVIRONMENT ; DIAMONDOID HYDROCARBONS ; THERMAL MATURITY ; CARBON ISOTOPES ; SURMA BASIN ; SAG ; SEDIMENTS ; BICADINANES ; PETROLEUM |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Natural Science Foundation of Guangdong Province[2018B030306006] ; Natural Science Foundation of Guangdong Province[2018A030313234] ; Youth Innovation Promotion Association CAS[2018386] ; Guangdong Basic and Applied Basic Research Foundation[2019A1515011913] ; National Natural Sci-ence Foundation of China[41773034] ; 13th Five-Year National Science and Technology Major Project[2016ZX05026-006] |
| WOS Research Area | Geology |
| Funding Organization | Natural Science Foundation of Guangdong Province ; Youth Innovation Promotion Association CAS ; Guangdong Basic and Applied Basic Research Foundation ; National Natural Sci-ence Foundation of China ; 13th Five-Year National Science and Technology Major Project |
| WOS Subject | Geosciences, Multidisciplinary |
| WOS ID | WOS:000718044900002 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/35319 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Li, Yun |
| Affiliation | 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem SKLOG, Guangzhou 510640, Peoples R China 2.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 3.China Natl Offshore Oil Corp Ltd, Shenzhen Branch, Shenzhen 518000, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Nat Gas Hydrate, Guangzhou 510640, Peoples R China |
| Recommended Citation GB/T 7714 | Jiang, Wenmin,Chen, Cong,Long, Zulie,et al. Geochemical characteristics and possible sources of crude oils in the Baiyun deep-water area of the Pearl River Mouth Basin, South China Sea[J]. MARINE AND PETROLEUM GEOLOGY,2022,135:14. |
| APA | Jiang, Wenmin,Chen, Cong,Long, Zulie,Li, Yun,Yang, Chao,&Xiong, Yongqiang.(2022).Geochemical characteristics and possible sources of crude oils in the Baiyun deep-water area of the Pearl River Mouth Basin, South China Sea.MARINE AND PETROLEUM GEOLOGY,135,14. |
| MLA | Jiang, Wenmin,et al."Geochemical characteristics and possible sources of crude oils in the Baiyun deep-water area of the Pearl River Mouth Basin, South China Sea".MARINE AND PETROLEUM GEOLOGY 135(2022):14. |
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