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Jianyu Miao, State Key Laboratory of Continental Dynamics (China)
Xiangling Li, State Key Laboratory of Continental Dynamics (China)
Jianshe Zhao, Shaanxi Key Laboratory for Physico-Inorganic Chemistry (China)
Chiyang Liu, State Key Laboratory of Continental Dynamics (China)
Zhenhua Liu, China institute of Atmotic energy reactor physics laboratory (China)
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Through the thermal simulation experiments of kerogen in the source rocks of the Ordos basin, the quantity and composition of the pyrolyzed hydrocarbon in different types of kerogen have been evaluated. The analysis of pyrolye kerogen in source rocks proves that Uranium bearing substances have distinct catalytic action on different types of kerogen in source rocks and there are some distinct relationships between the quantity and composition of the pyrolyzed hydrocarbon.
Thermal simulation experiments demonstrate that in the range of experiment temperature limitation(30°), irradiated under U235, the source rocks with higher organic carbon are favorable for the pyrolyzed hydrocarbon both in its quantity as well as in its composition, which give birth to the complex in the pyrolyzed hydrocarbon. Temperature is a key factor influencing the source rocks. The observed pyrolyzed hydrocarbon in source rocks is the jointly result of promoting and suppressing of the temperature effect. Exposed under the U235 source, a comparative study has been carried out on the relationships between the characteristic of the microscopic organic composition and the thermal hydrocarbon generating in the Palaeozoic terraneous source rocks rich in organic matters in the Erdos Basin.
The study shows that if lower in the pyrolyzed hydrocarbon, the original source rocks may be weaker in hydrocarbon generating, whereas, richer in organic remains or higher in the original hydrocarbon generating. Thus the content of organic carbon and the types of kerogen in source rocks can figure out the quantity and composition of pyrolyzed hydrocarbon, and bring to light the distinct differences in microscopic constitutes of source rocks, the source of the original organic matters, their sediment environments as well as their maturity.
Through the thermal simulation experiments to probe into the influence of Uranium on the hydrocarbon generating in source rocks in the Ordos Basin is of great significance in the understanding of the hydrocarbon generating and functional mechanism of Uranium on organic substance.
Key words: Uranium substance; thermal simulation experiment; kerogen; source rock; Ordos Basin
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