Abstract
Low-medium maturity shale reservoirs have received increasing attention because of their enormous oil and gas generation potential. In this paper, a series of shale pyrolysis experiments were carried out on Longkou shale core samples using a high-temperature and high-pressure autoclave reactor, to study the weight loss, shale oil yield, as well as the compositions of shale oil and gas at different pyrolysis times via supercritical water at 385 ℃. The results show that the shale oil yield initially rises and then drops as the pyrolysis time increases, with the maximum oil yield occurring at 9 h. However, if the pyrolysis time is too long, the secondary cracking reaction will be aggravated, resulting in a decrease in oil yield. With the increase of pyrolysis time, the content of heavy fractions in shale oil decreases, the content of light fractions increases, and the oil is becoming lighter, indicating that prolonging the pyrolysis time can improve the quality of shale oil. In addition, the increase in pyrolysis time contributes to the pyrolysis transformation of organic matter in shale, which leads to a large increase in C2-C5 hydrocarbon gases.
Copyright 2022, IFEDC Organizing Committee.
This paper was prepared for presentation at the 2022 International Field Exploration and Development Conference in Xi’an, China, 16–18 November 2022.
This paper was selected for presentation by the IFEDC Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the IFEDC Technical Team and are subject to correction by the author(s). The material does not necessarily reflect any position of the IFEDC Technical Committee its members. Papers presented at the Conference are subject to publication review by Professional Team of IFEDC Technical Committee. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of IFEDC Organizing Committee is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of IFEDC. Contact email: paper@ifedc.org.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Zhao, W.Z., Hu, S.Y., Hou, L.H.: Connotation and strategic role of in-situ conversion processing of shale oil underground in the onshore China. Pet. Explor. Dev. 45(4), 537–545 (2018)
Zou, C.N., et al.: Shale oil and gas revolution and its impact. Acta Petrolei Sinica 41(1), 1–12 (2020)
Zou, C.N., et al.: Formation, distribution, potential and prediction of global conventional and unconventional hydrocarbon resources. Pet. Explor. Dev. 42(1), 13–25 (2015)
Cui, J.W., Zhu, R.K., Hou, L.H., Wu, S.T., Mao, Z.G., Li, S.: Shale in-situ mining technology status quo of challenges and opportunities. Unconvent. Oil Gas 5(6), 103–114 (2018)
Kershaw, J.R.: Extraction of victorian brown coals with supercritical water. Fuel Process. Technol. 13(2), 111–124 (1986)
Han, L.N., Zhang, R., Bi, J.C.: Upgrading of coal-tar pitch in supercritical water. J. Fuel Chem. Technol. 36(1), 1–5 (2008)
Han, L.N., Zhang, R., Bi, J.C.: Reaction property of coal tar and its fractions in supercritical water. J. Fuel Chem. Technol. 36(6), 653–659 (2008)
Sato, T., Mori, S., Watanabe, M., Sasaki, M., Itoh, N.: Upgrading of bitumen with formic acid in supercritical water. J. Supercrit. Fluids 55(1), 232–240 (2010)
Luik, H., Luik, L.: Extraction of fossil fuels with sub-and supercritical water. Energy Sourc. 23(5), 449–459 (2001)
Na, J.G., Im, C.H., Chung, S.H., Lee, K.B.: Effect of oil shale retorting temperature on shale oil yield and properties. Fuel 95, 131–135 (2012)
Wang, S., Jiang, X.M., Han, X.X., Tong, J.H.: Effect of retorting temperature on product yield and characteristics of non-condensable gases and shale oil obtained by retorting Huadian oil shales. Fuel Process. Technol. 121, 9–15 (2014)
Acknowledgments
This research was supported by the National Natural Science Foundation of China (No. 51974341), the Key Technology Research and Development Program of Shandong Province (No. 2019GSF109095, 2019RKE28001), and the Fundamental Research Funds for the Central Universities (No. 20CX06070A).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2023 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Meng, Fy., Yao, Cj., Zhang, Hx., Di, Ty., Yao, Xx., Du, Xg. (2023). Experimental Investigation of Pyrolysis Characteristics of Shale via Supercritical Water. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2022. IFEDC 2022. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-99-1964-2_545
Download citation
DOI: https://doi.org/10.1007/978-981-99-1964-2_545
Publisher Name: Springer, Singapore
Print ISBN: 978-981-99-1963-5
Online ISBN: 978-981-99-1964-2
eBook Packages: EngineeringEngineering (R0)