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Organic matter heterogeneity and shale oil significance in Triassic Zhangjiatan shale,Ordos Basin, China
Li XY(李小燕)
2021-09
Source PublicationEnergy Exploration & Exploitation
Volume9Issue:9Pages:1-2
Abstract

Organic matter heterogeneity exerts an important impact on the generation, evaluation, and exploitation of shale oil resources. In the past, only a limited number of analytical samples that represented the contribution or influence of high or low organic matter abundance intervals were used to represent an entire set of thick source rocks, and based on this limitation, occasionally researchers have reached incorrect conclusions. Here, the heterogeneity of organic matter and its significance to shale oil in the Triassic Zhangjiatan shale of the Ordos Basin were discussed based on sedimentary and geochemical analyses. Our results indicate that (1) the Chang 7(3) shale within the study area is characterized by high abundance, good quality, strong heterogeneity, and segmented enrichment in the vertical profile. The primary organic matter type was type II1, and this was followed by types I, II2, and III that exhibited three changing trends in the vertical profile. Organic matter maturity is primarily at the immature stage. (2) Additionally, we observed that the organic matter heterogeneity of Chang 7(3) shale was related to changes in lithology, sedimentary environment, paleoproductivity, terrigenous influence, and event action (such as volcanism and hydrothermal processes). The abundance of organic matter is the result of the coupling control of these processes. In the process of organic matter deposition, if volcano or hydrothermal activities occurred, the organic matter was abnormally enriched, and the total organic carbon content exceeded 20% and could even be as high as 40%. (3) Finally, we observed at least nine enrichment layers that were controlled by the coupling of different geological factors, and there were four potential target resource layers corresponding to the hydrothermal sedimentary area.

Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.las.ac.cn/handle/12502/11702
Collection中国科学院兰州文献情报中心_期刊编辑出版部
Affiliation中国科学院西北生态环境资源研究院
Recommended Citation
GB/T 7714
Li XY. Organic matter heterogeneity and shale oil significance in Triassic Zhangjiatan shale,Ordos Basin, China[J]. Energy Exploration & Exploitation,2021,9(9):1-2.
APA Li XY.(2021).Organic matter heterogeneity and shale oil significance in Triassic Zhangjiatan shale,Ordos Basin, China.Energy Exploration & Exploitation,9(9),1-2.
MLA Li XY."Organic matter heterogeneity and shale oil significance in Triassic Zhangjiatan shale,Ordos Basin, China".Energy Exploration & Exploitation 9.9(2021):1-2.
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