[an error occurred while processing this directive] Global Geology 2020, 23(4) 247-254 DOI:   10.3969/j.issn.1673-9736.2020.04.06  ISSN: 1673-9736 CN: 22-1371/P

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本文关键词相关文章
oil shale
in-situ mining
numerical simulation
fluid-thermo-solid coupling
stress-strain relationship
本文作者相关文章
ZHANG Tiantong
LIU Zeyu
XIE Zhixian
LI Yubo
XUE Linfu
PubMed
Article by Zhang T
Article by Liu Z
Article by Xie Z
Article by Li Y
Article by Xue L
Numerical simulation of oil shale in-situ mining using fluid-thermo-solid coupling
ZHANG Tiantong, LIU Zeyu, XIE Zhixian, LI Yubo, XUE Linfu
College of Earth Sciences, Jilin University, Changchun 130061, China
摘要: For the in-situ gas-injection mining technology of oil shale by process, a numerical simulation method with flow-thermo-solid coupling is proposed in this paper. This method adopts separate simulations and step-by-step coupling simulation ideas combined with the advantages of the finite element method and the finite volume method. The numerical simulation of flow-thermo-solid coupling is decomposed into two parts:flow-solid coupling and thermo-solid coupling. Considering the Fuyu oil shale in-situ production test area in Songliao Basin as an example, it is concluded that the oil shale has undergone four heating stages:a rapid temperature rise, a steady temperature rise, a slow temperature rise, and heat preservation. It takes about 10 years for the stress-strain state of the oil shale layer to reach a steady-state through the thermo-solid coupling. The main strain zones of the oil shale layer are distributed near the fracturing fractures connected to the gas injection well and at the edge of the fracturing fractures. The areas with the plastic deformation in the oil shale layer predominantly appear near the gas injection wells, production wells, and fracturing channels. The areas with the largest fracture strength are mostly distributed near the edge of the fracturing fractures with low flow velocity and low temperature.
关键词 oil shale   in-situ mining   numerical simulation   fluid-thermo-solid coupling   stress-strain relationship  
Numerical simulation of oil shale in-situ mining using fluid-thermo-solid coupling
ZHANG Tiantong, LIU Zeyu, XIE Zhixian, LI Yubo, XUE Linfu
College of Earth Sciences, Jilin University, Changchun 130061, China
Abstract: For the in-situ gas-injection mining technology of oil shale by process, a numerical simulation method with flow-thermo-solid coupling is proposed in this paper. This method adopts separate simulations and step-by-step coupling simulation ideas combined with the advantages of the finite element method and the finite volume method. The numerical simulation of flow-thermo-solid coupling is decomposed into two parts:flow-solid coupling and thermo-solid coupling. Considering the Fuyu oil shale in-situ production test area in Songliao Basin as an example, it is concluded that the oil shale has undergone four heating stages:a rapid temperature rise, a steady temperature rise, a slow temperature rise, and heat preservation. It takes about 10 years for the stress-strain state of the oil shale layer to reach a steady-state through the thermo-solid coupling. The main strain zones of the oil shale layer are distributed near the fracturing fractures connected to the gas injection well and at the edge of the fracturing fractures. The areas with the plastic deformation in the oil shale layer predominantly appear near the gas injection wells, production wells, and fracturing channels. The areas with the largest fracture strength are mostly distributed near the edge of the fracturing fractures with low flow velocity and low temperature.
Keywords: oil shale   in-situ mining   numerical simulation   fluid-thermo-solid coupling   stress-strain relationship  
收稿日期 2020-04-15 修回日期 2020-05-10 网络版发布日期  
DOI: 10.3969/j.issn.1673-9736.2020.04.06
基金项目:

Supported by Project of Science and Technology Department of Jilin Province (No. 20170201001SF).

通讯作者: ZHANG Tiantong
作者简介:
作者Email: 13596403182@163.com

参考文献:
Jiang P F, Sun Y H, Guo W, et al. 2015. Heating technology and heat transfer simulation for oil shale of in-situ pyrolysis by fracturing and nitrogen injection. Journal of Northeastern University (Natural Science), 36(9):1353-1357,1368.(in Chinese with English abstract)
Kang Z Q, Yang D, Zhao Y S, et al. 2008. Physical principle and numerical analysis of oil shale development using in-situ conversion process technology. Acta Petrolei Sinica, 29(4):592-595.(in Chinese with English abstract)
Li J, Tang D Z, Xue Q H, et al. 2014. Discussion of oil shale in-situ conversion process in China. Journal of Southwest Petroleum University (Science & Technology Edition), 36(1):58-64. (in Chinese with English abstract)
Li K. 2011. Research on thermal-hydrological-mechanical coupling mode for oil shale in-situ exploitation and hydrologic fracturing:master's degree thesis. Fuxin:Liaoning University of Engineering and Technology.(in Chinese with English abstract)
Li Y, Lin M, Zhao Z B. 2015. Numerical model of thermal-hydrological-mechanical coupling and its application. Chinese Journal of Hydrodynamics, 30(1):56-63.(in Chinese with English abstract)
Li Y B, Xue L F, Ma J X. 2018. Numerical simulation of porosity and permeability changes in in-situ of oil shale. Science Technology and Engineering, 18(34):43-50.(in Chinese with English abstract)
Liu Z Y. 2019. A coupled numerical simulation for oil shale in-situ Mining:master's degree thesis. Changchun:Jilin University.(in Chinese with English abstract)
Liu Z Y, Liu X Y, Niu M X, et al. 2019. Evaluation of temperature measurement errors of heating on oil shale in-situ. Global Geology, 38(2):448-453.(in Chinese with English abstract)
Ma J X, Xue L F, Zhao J M, et al.2019. Numerical simulation and design optimization of temperature field of oil shale in situ pyrolysis and exploitation. Science Technology and Engineering, 19(5):94-103.(in Chinese with English abstract)
Ma L, Yin X Y, Sun H, et al. 2012. Present status of oil shale resource utilization in the world and its development prospects. Global Geology, 31(4):772-777.(in Chinese with English abstract)
Qin H, Xu F P, Liu H P, et al. 2014. Thermal fragmentation characteristic of oil shale. Science Technology and Engineering, 14(13):26-30.(in Chinese with English abstract)
Qian J L, Yin L. 2008. Oil shale-Supplementary energy for oil. Beijing:Sinopec Publishing House,1.(in Chinese with English abstract)
Sun K M, Zhao Y S, Yang D, et al. 2008. Thermoelastoplastic damage model of heterogeneic medium and its application to thermal cracking analysis of oil shale in underground mining. Chinese Journal of Rock Mechanics and Engineering, 27(1):42-52.(in Chinese with English abstract)
Wang Q, Xu J, Ye J B, et al. 2017. Analysis and comparison of three pyrolysis kinetic models of Maoming oil shale in Guangdong Province. Science Technology and Engineering, 17(32):112-118.(in Chinese with English abstract)
Zhang X Q, Zhang L Y, Qian Y, et al. 2014. The effect of different demineralization ways on oil shale retort characteristics. Science Technology and Engineering, 14(1):10-13.(in Chinese with English abstract)
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