Articles | Volume 14, issue 11
https://doi.org/10.5194/se-14-1169-2023
https://doi.org/10.5194/se-14-1169-2023
Method article
 | 
07 Nov 2023
Method article |  | 07 Nov 2023

The influence of extraction of various solvents on chemical properties on Chang 7 shale, Ordos Basin, China

Yan Cao, Zhijun Jin, Rukai Zhu, and Kouqi Liu

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Subject area: The evolving Earth surface | Editorial team: Stratigraphy, sedimentology, geomorphology, morphotectonics, and palaeontology | Discipline: Sedimentology
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Cited articles

Abourriche, A. K., Oumam, M., Hannache, H., Birot, M., Abouliatim, Y., Benhammou, A., El Hafiane, Y., Abourriche, A. M., Pailler, R., and Naslain, R.: Comparative studies on the yield and quality of oils extracted from Moroccan oil shale, J. Supercrit. Fluids, 84, 98–104, https://doi.org/10.1016/j.supflu.2013.09.018, 2013. 
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Cao, Y., Han, H., Guo, C., Pang, P., Ding, Z. G., and Gao, Y.: Influence of extractable organic matters on pore structure and its evolution of Chang 7 member shales in the Ordos Basin, China: Implications from extractions using various solvents, J. Nat. Gas Sci. Eng., 79, 103370, https://doi.org/10.1016/j.jngse.2020.103370, 2020. 
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Short summary
Fourier transform infrared (FTIR) was performed on shale before and after solvent extraction. The extraction yield from shale with THF is higher than other solvents. The organic-C-normalized yield of a mature sample is higher than other samples. The aromaticity of organic matter increases, and the length of organic matter aliphatic chains  does not vary monotonically with increasing maturity. The results will help in the selection of organic solvents for oil-washing experiments of shale.