Origin and evolution of a CO2-Rich gas reservoir offshore Angola: Insights from the Gas Composition and isotope analysis
文献类型：期刊论文
| 作者 | Liu, Junjie1,5,6,7; Pujol, Magali3; Zhou, Honggang3; Selby, David1,4; Li, Jie5,6 ; Cheng, Bin2,5
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| 刊名 | APPLIED GEOCHEMISTRY
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| 出版日期 | 2023 |
| 卷号 | 148页码:10 |
| 关键词 | Kwanza basin Angola Pre -salt reservoir Petroleum potential South Atlantic ocean opening CO2 |
| ISSN号 | 0883-2927 |
| DOI | 10.1016/j.apgeochem.2022.105552 |
| 英文摘要 | The pre-salt sections of the offshore Kwanza Basin, Angola are potentially petroliferous reservoirs like their Brazilian counterparts on the other side of the South Atlantic Ocean. In this study, a pre-salt reservoir of the offshore Kwanza Basin was found to contain solid bitumen and gas of high portions of CO2 (ca. 83%) and methane (ca. 16%). The chemical and isotopic (C, H and He) compositions of the gas indicate that the CO2 is primarily mantle-derived while the gaseous hydrocarbons are mainly late mature thermogenic gas. The Barremian-Aptian Red Cuvo Formation with sapropelic and humic organic matter and an average TOC content of 1.7% could be the principal source of the bitumen and gaseous hydrocarbons in the reservoir. Rapid oil generation since the source rock sedimentation could have occurred as a result of the fast and thick salt deposition or the high thermal gradient created by the crustal thinning and magmatism during the South Atlantic Ocean opening. The delta 13C of gaseous hydrocarbons also indicates their mixed origins of sapropelic and humic organic matters and possible abiotic processes.This reservoir is similar in the origin of CO2 and geological background to some pre-salt reservoirs in the Brazilian basins. Such similarities with prolific petroleum systems may imply great petroleum potential in the pre-salt sections of the offshore Kwanza Basin, Angola. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000920335600001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/72635]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Li, Jie |
| 作者单位 | 1.Univ Durham, Deparment Earth Sci, Durham DH1 3LE, England 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 3.Ctr Sci & Tech Jean Feger, TOTAL, Ave Larribau, F-64018 Pau, France 4.China Univ Geosci Wuhan, Sch Earth Resources, State Key Lab Geol Proc & Mineral Resources, Wuhan, Peoples R China 5.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 6.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 7.Sun Yat sen Univ, Sch Earth Sci & Engn, Guangdong Key Lab Geodynam & Geohazards, Guangzhou 510275, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Junjie,Pujol, Magali,Zhou, Honggang,et al. Origin and evolution of a CO2-Rich gas reservoir offshore Angola: Insights from the Gas Composition and isotope analysis[J]. APPLIED GEOCHEMISTRY,2023,148:10. |
| APA | Liu, Junjie,Pujol, Magali,Zhou, Honggang,Selby, David,Li, Jie,&Cheng, Bin.(2023).Origin and evolution of a CO2-Rich gas reservoir offshore Angola: Insights from the Gas Composition and isotope analysis.APPLIED GEOCHEMISTRY,148,10. |
| MLA | Liu, Junjie,et al."Origin and evolution of a CO2-Rich gas reservoir offshore Angola: Insights from the Gas Composition and isotope analysis".APPLIED GEOCHEMISTRY 148(2023):10. |
入库方式： OAI收割
来源：广州地球化学研究所
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