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| Visualization and quantitative study on seepage characteristics of oil shale under microwave radiation |
| ZHANG Yongli1，2，LU Dandan1，CHENG Yao1，3，ZHAO Longfei1 |
| (1. School of Mechanics and Engineering，Liaoning University of Engineering and Technology，Fuxin，Liaoning 123000，China；2. Institute of Science and Technology，Liaoning University of Engineering and Technology，Fuxin，Liaoning 123000，China；3. College of Innovation and Practice，Liaoning University of Engineering and Technology，Fuxin，Liaoning 123000，China) |
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Abstract In order to study the evolution of seepage characteristics of oil shale under microwave radiation，high-resolution X-ray CT scanning technology was used to visualize and analyze Fushun oil shale after microwave pyrolysis. The three-dimensional pore structure of oil shale was obtained by 3D image reconstruction technology，and the characteristic information of seepage flow and pressure field was quantitatively analyzed. The results show that：(1) microwave power has a great influence on the pore structure of Fushun oil shale. At 800 W and 600 ℃，the porosity of oil shale is 16.61%. At 400 W and 600 ℃，the porosity of oil shale is 8.42%. The distribution and morphology of pores and fissures are also affected by microwave power. (2) Higher microwave power can improve the fractal dimension and pore aspect ratio of oil shale，make the surface rougher and pore structure more complex, higher porosity，and easier to develop into cracks, which will improve the permeability of oil shale. (3) Through the analysis of medium flow rate value and pore medium pressure value, it is found that the medium flow rate value at 800 W microwave power is 1.25 times the medium flow rate value at 400 W microwave power and 8.68 times the medium flow rate value at 600 W microwave power，and the medium pressure value decreases with the increase of microwave temperature and power. These results enhance the understanding of the thermal effects of microwave radiation oil shale，and find that microwave power has a significant effect on the pore structure and permeability of oil shale.
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[1] 王 磊，杨 栋，康志勤. 高温水蒸汽作用后油页岩渗透特性及各向异性演化的试验研究[J]. 岩石力学与工程学报，2021，40(11)：2 286–2 295.(WANG Lei，YANG Dong，KANG Zhiqin. Experimental study on permeability characteristics and anisotropic evolution of oil shale after high-temperature water vapor action[J] Chinese Journal of Rock Mechanics and Engineering，2021，40(11)：2 286– 2 295.(in Chinese))
[2] 张红鸽，赵阳升，杨 栋，等. 温度对油页岩热解–力学–渗流特性的影响研究[J]. 太原理工大学学报，2021，52(6)：945–952.(ZHANG Hongge，ZHAO Yangsheng，YANG Dong，et al. Study on the influence of temperature on the pyrolysis mechanics seepage characteristics of oil shale[J] Journal of Taiyuan University of Technology，2021，52(6)：945–952.(in Chinese))
[3] 王 磊，赵阳升，杨 栋. 注水蒸汽原位热解油页岩细观特征研究[J]. 岩石力学与工程学报，2020，39(8)：1 634–1 647.(WANG Lei，ZHAO Yangsheng，YANG Dong. Study on meso characteristics of in-situ pyrolysis of oil shale by water injection steam[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(8)：1 634– 1 647.(in Chinese))
[4] 康志勤，李 翔，杨 涛，等. 基于传导、对流不同加热模式的油页岩孔隙结构变化的对比研究[J]. 岩石力学与工程学报，2018，37(11)：2 565–2 575.(KANG Zhiqin，LI Xiang，YANG Tao，et al. Comparative study on pore structure changes of oil shale based on different heating modes of conduction and convection[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(11)：2 565– 2 575.(in Chinese))
[5] 李年银，王 元，陈 飞，等. 油页岩原位转化技术发展现状及展望[J]. 特种油气藏，2022，29(3)：1–8.(LI Nianyin，WANG Yuan，CHEN Fei，et al. Development status and prospect of in-situ conversion technology for oil shale[J]. Special Oil and Gas Reservoirs，2022，29(3)：1–8.(in Chinese))
[6] BAI F，SUN Y，LIU Y，et al. Evaluation of the porous structure of Huadian oil shale during pyrolysis using multiple approaches[J]. Fuel，2017，187(1)：1–8.
[7] NAZZAL J M，WILLIAMS P T. Influence of temperature and steam on the products from the flash pyrolysis of Jordan oil shale[J]. International Journal of Energy Research，2002，26(14)：1 207–1 219.
[8] 太原理工大学. 对流加热油页岩开采油气的方法[P]. 中国：CN200510012473.4，2005–10–05.(Taiyuan University of Technology. Methods of oil shale production by convection heating[P]. China：CN200510012473.4，2005–10–05.(in Chinese))
[9] 白奉田. 局部化学法热解油页岩的理论与室内试验研究[博士学位论文][D]. 吉林：吉林大学，2015.(BAI Fengtian. Theoretical and laboratory experimental study on local chemical pyrolysis of oil shale[Ph. D. Thesis][D]. Jilin：Jilin University，2015.(in Chinese))
[10] 杨少强. 高温实时作用下油页岩微观结构演化及力学响应规律研究[博士学位论文][D]. 太原：太原理工大学，2021.(YANG Shaoqiang. Study on microstructure evolution and mechanical response law of oil shale under high-temperature real-time action[Ph. D. Thesis][D]. Taiyuan：Taiyuan University of Technology，2021.(in Chinese))
[11] 杨兆中，朱静怡，李小刚，等. 微波加热技术在非常规油资源中的研究现状与展望[J]. 化工进展，2016，35(11)：3 478–3 483.(YANG Zhaozhong，ZHU Jingyi，LI Xiaogang，et al. Research status and prospects of microwave heating technology in unconventional oil resources[J]. Chemical Progress，2016，35(11)：3 478–3 483.(in Chinese))
[12] ZENG F，DONG C，LIN C，et al. Pore structure characteristics of reservoirs of Xihu Sag in East China Sea Shelf Basin based on dual resolution X-ray computed tomography and their influence on permeability[J]. Energy，2022，239(D)：122386.
[13] YANG R，HE S，YI J，et al. Nano-scale pore structure and fractal dimension of organic-rich Wufeng—Longmaxi shale from Jiaoshiba area，Sichuan Basin：Investigations using FE-SEM，gas adsorption and helium pycnometry[J]. Marine and Petroleum Geology，2016，70(2)：27–45.
[14] LIU X，NIE B，WANG W，et al. The use of AFM in quantitative analysis of pore characteristics in coal and coal-bearing shale[J]. Marine and Petroleum Geology，2019，105(7)：331–337.
[15] SUN C R，TANG S H，ZHANG S H，et al. Nanopore characteristics of late paleozoic transitional facies coal-bearing shale in Ningwu Basin，China Investigated by nuclear magnetic resonance and low-pressure nitrogen adsorption[J]. Journal of Nanoscience and Nanotechnology，2017，17(9)：6 433–6 444.
[16] KONG X G，WANG E Y，HU S B，et al. Fractal characteristics and acoustic emission of coal containing methane in triaxial compression failure[J]. Journal of Applied Geophysics，2016，124(1)：139–147.
[17] 李 静，刘 晨，刘惠民，等. 基于数字岩芯的页岩储层岩石细观损伤机制研究[J]. 岩石力学与工程学报，2022，41(6)：1 103– 1 113.(LI Jing，LIU Chen，LIU Huimin，et al. Research on the Microscopic damage mechanism of shale reservoir rock based on digital core[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(6)：1 103–1 113.(in Chinese))
[18] 黄贤胜，成卫青，林 伟，等. 基于CT扫描图像的砂岩石三维建模研究[J]. 计算机技术与发展，2020，30(7)：115–119.(HUANG Xiansheng，CHENG Weiqing，LIN Wei，et al. Research on 3D modeling of sandstone based on CT scanning images[J]. Computer Technology and Development，2020，30(7)：115–119.(in Chinese))
[19] SAIF T，LIN Q，BUTCHER A R，et al. Multi-scale multi-dimensional microstructure imaging of oil shale pyrolysis using X-ray micro- tomography，automated ultra-high resolution SEM，MAPS Mineralogy and FIB-SEM[J]. Applied Energy，2017，202(9)：628–647.
[20] RABBANI A，BAYCHEV T G，AYATOLLAHI S，et al. Evolution of pore-scale morphology of oil shale during pyrolysis：a quantitative analysis[J]. Transport in Porous Media，2017，119(1)：143–162.
[21] 王国营，杨 栋，康志勤. 高温三轴应力作用下油页岩的渗透特征各向异性演化规律实验研究[J]. 岩石力学与工程学报，2020，39(6)：1 129–1 141.(WANG Guoying，YANG Dong，KANG Zhiqin. Experimental study on anisotropic evolution law of permeability characteristics of oil shale under high-temperature triaxial stress[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(6)： 1 129–1 141. (in Chinese))
[22] 罗万江，兰新哲，宋永辉. 油页岩微波热解气态产物析出特性[J]. 化工进展，2015，34(3)：689–694.(LUO Wanjiang，LAN Xinzhe，SONG Yonghui. Precipitation characteristics of gaseous products from microwave pyrolysis of oil shale[J]. Chemical Progress，2015，34(3)：689–694.(in Chinese))
[23] 赵建鹏，崔利凯，陈 惠，等. 基于CT扫描数字岩芯的岩石微观结构定量表征方法[J]. 现代地质，2020，34(6)：1 205–1 213.(ZHAO Jianpeng，CUI Likai，CHEN Hui，et al. Quantitative characterization method of rock microstructure based on CT scanning digital core[J]. Modern Geology，2020，34(6)：1 205–1 213.(in Chinese))
[24] 姜黎明，孙建孟，刘学锋，等. 天然气饱和度对岩石弹性参数影响的数值研究[J]. 测井技术，2012，36(3)：239–243.(JIANG Liming，SUN Jianmeng，LIU Xuefeng，et al. Numerical study on the effect of natural gas saturation on rock elastic parameters[J]. Logging Technology，2012，36(3)：239–243.(in Chinese))
[25] 刘向君，朱洪林，梁利喜. 基于微CT技术的砂岩数字岩石物理实验[J]. 地球物理学报，2014，57(4)：1 133–1 140.(LIU Xiangjun，ZHU Honglin，LIANG Lixi. Digital rock physics experiment of sandstone based on micro CT technology[J]. Journal of Geophysics，2014，57(4)：1 133–1 140.(in Chinese))
[26] WANG M，XUE H，TIAN S，et al. Fractal characteristics of upper cretaceous lacustrine shale from the Songliao Basin，NE China[J]. Marine and Petroleum Geology，2015，67(11)：144–153.
[27] LI T，JIANG Z，LI Z，et al. Continental shale pore structure characteristics and their controlling factors：A case study from the lower third member of the Shahejie Formation，Zhanhua Sag，Eastern China[J]. Journal of Natural Gas Science and Engineering，2017，45： 670–692.
[28] 王一帆. 循环热冲击下煤岩孔裂隙结构演化及增透机制研究[硕士学位论文][D]. 重庆：重庆大学，2021.(WANG Yifan. Study on the evolution of pore fracture structure and the mechanism of increasing permeability of coal and rock under cyclic thermal shock[M. S. Thesis][D]. Chongqing：Chongqing University，2021.(in Chinese))
[29] YANG Z，ZHU J，LI X，et al. Experimental investigation of the transformation o f oil shale with fracturing fluids under microwave heating in the presence of nanoparticles[J]. Energy Fuels，2017，31(10)：10 348–10 357. |
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2023, Vol. 42 
