Dynamic characteristics and damage evolution law of Wufeng formation-Longmaxi formation shale under high temperature effects
WANG Yu1，2，ZHAI Cheng1，2，YU Xu1，2，SUN Yong1，2，CONG Yuzhou1，2
(1. School of Safety Engineering，China University of Mining and Technology，Xuzhou，Jiangsu 221116，China；
2. National Engineering Research Center for Coal Gas Control，China University of Mining and Technology，
Xuzhou，Jiangsu 221116，China)
Abstract：The explosive fracturing of shale with in-situ methane is a revolutionary technique，with a high temperature-shock wave synergy in the fracturing process. Therefore，it is important to study the dynamic characteristics and damage evolution of shale under high temperature to reveal the fracturing evolution of shale reservoir using explosive fracturing technology. In this paper，by comprehensive application of the rmogravimetric analyzer，muffle furnace，separated Hopkinson pressure bar(SHPB) experimental system，scanning electron microscope(SEM) and energy spectrum analysis(EDS)，the evolution law of shale dynamic characteristics with temperature was obtained，a dynamic damage constitutive model of shale considering thermal damage and compression-density stage was constructed and verified by experimental data，and finally the microscopic damage mechanism of the evolution of shale dynamic characteristics under high temperature was analyzed by SEM. The results show that the shale surface gradually develops connected fractures，and the high temperature thermal effect leads to water dissipation and thermal decomposition of the clay minerals and main carbonate minerals such as dolomite and calcite in this shale，and the pore-fracture structure is developed and connected，which integrally leads to the significant deterioration of the dynamic properties. With the increase of treatment temperature，the fracture form of the specimen changes from single fracture to complex fracture network，the dynamic compressive strength and elastic modulus first increase slightly and then decrease suddenly，and the strain rate and energy absorption ratio first decrease and then increase. These suggests that the high-temperature-shock wave synergy of the explosive fracturing of shale with in-situ methane facilitates the construction of complex fracture networks around the well perimeter of shale reservoirs. The dynamic damage constitutive model of shale is verified by experimental data，which proves that the model can better reflect the dynamic properties of shale under high temperature effect. The study is important to reveal the fracturing mechanism of explosive fracturing technology of shale with in-situ methane.
王 宇1，2，翟 成1，2，余 旭1，2，孙 勇1，2，丛钰洲1，2. 高温作用下五峰组–龙马溪组页岩动力学特征及损伤演化规律研究[J]. 岩石力学与工程学报, 2023, 42(5): 1110-1123.
WANG Yu1，2，ZHAI Cheng1，2，YU Xu1，2，SUN Yong1，2，CONG Yuzhou1，2. Dynamic characteristics and damage evolution law of Wufeng formation-Longmaxi formation shale under high temperature effects. , 2023, 42(5): 1110-1123.
[1] 李建忠，李登华，董大忠，等. 中美页岩气成藏条件、分布特征差异研究与启示[J]. 中国工程科学，2012，14(6)：56–63.(LI Jianzhong，LI Denghua，DONG Dazhong，et al. Comparison and enlightenment on formation condition and distribution characteristics of shale gas between China and U.S.[J]. Engineering Science，2012，14(6)：56–63.(in Chinese))
[2] 李海涛，罗 伟，姜雨省，等. 复合射孔爆燃气体压裂裂缝起裂扩展研究[J]. 爆炸与冲击，2014，34(3)：307–314.(LI Haitao，LUO Wei，JIANG Yusheng，et al. Initiation and extension of gas-driven fracture during compound perforation[J]. Explosion and Shock Waves，2014，34(3)：307–314.(in Chinese))
[3] 徐吉钊. 液态CO2循环冲击致裂煤体孔隙结构及损伤力学特征研究[博士学位论文][D]. 徐州：中国矿业大学，2020.(XU Jizhao. Study of pore evolution and damage mechanical characteristics of coals under the effect of liquid CO2 cyclic shock fracturing[Ph. D. Thesis][D]. Xuzhou：China University of Mining and Technology，2020.(in Chinese))
[4] 丛钰洲，翟 成，余 旭，等. 液氮冷冲击煤的作用范围及力学损伤机制[J]. 煤炭学报，2022，http：//kns.cnki.net/ kcms/detail/ 11.2190. td.20221026.1041.003.html(CONG Yuzhou，ZHAI Cheng，YU Xu，et al. Action scope and mechanical damage mechanism of liquid nitrogen on coal cold shock[J]. Journal of China Coal Society，2022，.http：//kns. cnki.net/kcms/ detail/11.2190.td.20221026. 1041.003.html.(in Chinese))
[5] 吴飞鹏，刘洪志，任 杨，等. 燃爆冲击作用下岩石初始破坏区形成机制与主控因素[J]. 爆炸与冲击，2016，36(5)：663–669.(WU Feipeng，LIU Hongzhi，REN Yang，et al. Formation mechanism and main controlling factors of rock's initial damaged zone under explosive impact effect[J]. Explosion and Shock Waves，2016，36(5)：663–669.(in Chinese))
[6] 刘 厅，翟 成，赵 洋，等. 基于LF-NMR的页岩多尺度孔裂隙应力敏感性评价[J]. 煤炭学报，2021，46(增2)：887–897.(LIU Ting，ZHAI Cheng，ZHAO Yang，et al. Evaluation on stress sensitivity of multiscale pore and fracture in shale based on LF-NMR[J]. Journal of China Coal Society，2021，46(Supp.2)：887–897.(in Chinese))
[7] 翟 成，郑仰峰，孙 勇，等. 一种页岩气储层甲烷原位多级脉冲聚能燃爆压裂方法[P]. 中国：CN112878973B，2021–06–01.(ZHAI Cheng，ZHENG Yangfeng，SUN Yong，et al. An in-situ multistage pulse shaped charge combustion explosion fracturing method for methane in shale reservoir[P]. China：CN112878973B，2021–06–01.(in Chinese))
[8] 尹土兵，李夕兵，王 斌，等. 高温后砂岩动态压缩条件下力学特性研究[J]. 岩土工程学报，2011，33(5)：777–784.(YIN Tubing，LI Xibing，WANG Bin，et al. Mechanical properties of sandstones after high temperature under dynamic loading[J]. Chinese Journal of Geotechnical Engineering，2011，33(5)：777–784.(in Chinese))
[9] 李 明. 高温及冲击载荷作用下煤系砂岩损伤破裂机制研究[博士学位论文][D]. 徐州：中国矿业大学，2014.(LI Ming. Research on rupture mechanisms of coal measures sandstone under high temperature and impact load[Ph. D. Thesis][D]. Xuzhou：China University of Mining and Technology，2014.(in Chinese))
[10] 许金余，刘 石. 加载速率对高温后大理岩动态力学性能的影响研究[J]. 岩土工程学报，2013，35(5)：879–883.(XU Jinyu，LIU Shi. Effect of impact velocity on dynamic mechanical behaviors of marble after high temperatures[J]. Chinese Journal of Geotechnical Engineering，2013，35(5)：879–883.(in Chinese))
[11] FAN L F，WU Z J，WAN Z，et al. Experimental investigation of thermal effects on dynamic behavior of granite[J]. Applied Thermal Engineering，2017，125：94–103.
[12] YIN T B，PENG K，WANG L，et al. Study on impact damage and energy dissipation of coal rock exposed to high temperatures[J]. Shock and Vibration，2016，Article ID 5121932.
[13] 吴明静. 高温状态下岩石的动态力学特性 实验与研究[硕士学位论文][D]. 淮南：安徽理工大学，2018.(WU Mingjing. Test and study on dynamic mechanical properties of rocks under high temperature[M. S. Thesis][D]. Huainan：Anhui University of Science and Technology，2018.(in Chinese))
[14] 刘 石，许金余. 高温作用对花岗岩动态压缩力学性能的影响研究[J]. 振动与冲击，2014，33(4)：195–198.(LIU Shi，XU Jinyu. Effect of high temperature on dynamic compressive mechanical properties of granite[J]. Journal of Vibration and Shock，2014，33(4)：195–198.(in Chinese))
[15] LIU S，XU J Y. Study on dynamic characteristics of marble under impact loading and high temperature[J]. International Journal of Rock Mechanics and Mining Sciences，2013，62：51–58.
[16] 田怡萍. 页岩爆燃压裂下裂缝扩展模式数值模拟研究[硕士学位论文][D]. 绵阳：西南科技大学，2019.(TIAN Yiping. Numerical simulation study on crack propagation mode under shale deflagration fracturing[M. S. Thesis][D]. Mianyang：Southwest University of Science and Technology，2019.(in Chinese))
[17] YANG G L，LIU J，LI X G，et al. Effect of temperature on shale strength under dynamic impact loading[J]. Arabian Journal of Geosciences，2020，13：1–9.
[18] FAN X R，LUO N，LIANG H L，et al. Dynamic breakage characteristics of shale with different bedding angles under the different ambient temperatures[J]. Rock Mechanics and Rock Engineering，2021，54(6)：3 245–3 261.
[19] 蒲泊伶，董大忠，耳 闯，等. 川南地区龙马溪组页岩有利储层发育特征及其影响因素[J]. 天然气工业，2013，33(12)：41–47.(PU Boling，DONG Dazhong，ER Chuang，et al. Favorable reservoir characteristics of the Longmaxi shale in the southern Sichuan Basin and their influencing factors[J]. Natural Gas Industry，2013，33(12)：41–47.(in Chinese))
[20] YI F，ELSWORTH D，WANG C Y，et al. Mineralogical controls on frictional strength，stability，and shear permeability evolution of fractures[J]. Journal of Geophysical Research-Solid Earth，2018，123(5)：3 549–3 563.
[21] 易同生，高 弟. 贵州龙马溪组页岩气储层特征及其分布规律[J]. 煤田地质与勘探，2015，43(3)：22–27.(YI Tongsheng，GAO Di. Characteristics and distribution pattern of shale gas reservoir in Longmaxi Formation in Guizhou Province[J]. Coal Geology and Exploration，2015，43(3)：22–27.(in Chinese))
[22] 王 擎，闫宇赫，贾春霞，等. 甘肃油页岩红外光谱分析及热解特性[J]. 化工进展，2014，33(7)：1 730–1 734.(WANG Qing，YAN Yuhe，JIA Chunxia，et al. FTIR analysis and pyrolysis characteristics of oil shale from Gansu province[J]. Chemical Industry and Engineering Progress，2014，33(7)：1 730–1 734.(in Chinese))
[23] ALCAZAR-VARA L A，GUERRERO-HERNANDEZ J，CORTES-MONROY I R. Thermal analysis of shale from a mexican deepwater gas field[J]. Arabian Journal for Science and Engineering，2022，47(6)：7 335–7 349.
[24] CHEN W，LEI Y F，CHEN Y L，et al. Pyrolysis and combustion enhance recovery of gas for two China shale rocks[J]. Energy and Fuels，2016，30(2)：10 298–10 305.
[25] GUO Y D，HUANG L Q，LI X B，et al. Experimental investigation on the effects of thermal treatment on the physical and mechanical properties of shale[J]. Journal of Natural Gas Science and Engineering，2020，82103496.
[26] DING Q L，JU F，MAO X B，et al. Experimental investigation of the mechanical behavior in unloading conditions of sandstone after high-temperature treatment[J]. Rock Mechanics and Rock Engineering，2016，49(7)：2 641–2 653.
[27] 曹文贵，林星涛，张 超，等. 基于非线性动态强度准则的岩石动态变形过程统计损伤模拟方法[J]. 岩石力学与工程学报，2017，36(4)：794–802.(CAO Wengui，LIN Xingtao，ZHANG Chao，et al. A statistical damage simulation method of dynamic deformation process for rocks based on nonlinear dynamic strength criterion[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(4)：794–802.(in Chinese))
[28] 单仁亮，薛友松，张 倩. 岩石动态破坏的时效损伤本构模型[J]. 岩石力学与工程学报，2003，22(11)：1 771–1 776.(SHAN Renliang，XUE Yousong，ZHANG Qian. Time dependent damage model of rock under dynamic loading[J]. Journal of Rock Mechanics and Engineering，2003，22(11)：1 771–1 776.(in Chinese))
[29] 朱晶晶，李夕兵，宫凤强，等. 单轴循环冲击下岩石的动力学特性及其损伤模型研究[J]. 岩土工程学报，2013，35(3)：531–539.(ZHU Jingjing，LI Xibing，GONG Fengqiang，et al. Dynamic characteristics and damage model for rock under uniaxial cyclic impact compressive loads[J]. Chinese Journal of Geotechnical Engineering，2013，35(3)：531–539.(in Chinese))
[30] WANG Z L，SHI H，WANG J G. Mechanical behavior and damage constitutive model of granite under coupling of temperature and dynamic loading[J]. Rock Mechanics and Rock Engineering，2018，51(10)：3 045–3 059.
[31] 张 明，王 菲，杨 强. 基于三轴压缩 实验的岩石统计损伤本构模型[J]. 岩土工程学报，2013，35(11)：1 965–1 971.(ZHANG Ming，WANG Fei，YANG Qiang. Statistical damage constitutive model for rocks based on triaxial compression tests[J]. Chinese Journal of Geotechnical Engineering，2013，35(11)：1 965–1 971.(in Chinese))
[32] 谢和平，高 峰，周宏伟，等. 岩石断裂和破碎的分形研究[J]. 防灾减灾工程学报，2003，(4)：1–9.(XIE Heping，GAO Feng，ZHOU Hongwei.，et al. Fractal fracture and fragmentation in rocks[J]. Journal of Disaster Prevention and Mitigation Engineering，2003，(4)：1–9.(in Chinese))
[33] 赵亚永，魏 凯，周佳庆，等. 三类岩石热损伤力学特性的 实验研究与细观力学分析[J]. 岩石力学与工程学报，2017，36(1)：142–151.(ZHAO Yayong，WEI Kai，ZHOU Jiaqing，et al. Laboratory study and micromechanical analysis of mechanical behaviors of three thermally damaged rocks[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(1)：142–151.(in Chinese))
[34] PENG Z W，REDFERN S A T. Mechanical properties of quartz at the α-β phase transition：Implications for tectonic and seismic anomalies[J]. Geochemistry，Geophysics，Geosystems，2013，14(1)：18–28.
[35] 金解放，李夕兵，常军然，等. 循环冲击作用下岩石应力应变曲线及应力波特性[J]. 爆炸与冲击，2013，33(6)：613–619.(JIN Jiefang，LI Xibing，CHANG Junran，et al. Stress-strain curves and stress wave characteristics of rocks subjected to cyclic impact loadings[J]. Explosion and Shock Waves，2013，33(6)：613–619.(in Chinese))
[36] 李夕兵，宫凤强，高 科，等. 一维动静组合加载下岩石冲击破坏 实验研究[J]. 岩石力学与工程学报，2010，29(2)：251–260.(LI Xibing，GONG Fengqiang，GAO Ke，et al. Test study of impact failure of rock subjected to onedimensional coupled static and dynamic loads[J]. Journal of Rock Mechanics and Engineering，2010，29(2)：251–260.(in Chinese))
[37] 夏昌敬，谢和平，鞠 杨. 孔隙岩石的SHPB 实验研究[J]. 岩石力学与工程学报，2006，25(5)：896–900.(XIA Changjing，XIE Heping，JU Yang. SHPB test on porous rock[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(5)：896–900.(in Chinese))
[38] 平 琦，苏海鹏，马冬冬，等. 不同高温作用后石灰岩物理与动力特性 实验研究[J]. 岩土力学，2021，42(4)：932–942.(PING Qi，SU Haipeng，MA Dongdong，et al. Experimental study on physical and dynamic mechanical properties of limestone after different high temperature treatment[J]. Rock and Soil Mechanics，2021，42(4)：932–942.(in Chinese))
[39] 徐小丽. 温度载荷作用下花岗岩力学性质演化及其微观机制研究[博士学位论文][D]. 徐州：中国矿业大学，2008.(XU Xiaoli. Research on the mechanical characteristics and micromechanism of granite under temperature loads[Ph. D. Thesis][D]. Xuzhou：China University of Mining and Technology，2008.(in Chinese))
[40] 田建锋，陈振林，凡元芳，等. 砂岩中自生绿泥石的产状、形成机制及其分布规律[J]. 矿物岩石地球化学通报，2008，27(2)：200–206.(TIAN Janfeng，CHEN Zhenlin，FAN Yuanfang，et al. The occurrence，growth mechanism and distribution of authigen-ic chlorite in sandstone[J]. Bulletin of Mineralogy，Petrology and Geochemistry，2008，27(2)：200–206.(in Chinese))
[41] 董志国，张连昌，王长乐，等. 沉积碳酸锰矿床研究进展及有待深入探讨的若干问题[J]. 矿床地质，2020，39(2)：237–255.(DONG Zhiguo，ZHANG Lianchang，WANG Changle，et al. Progress and problems in understanding sedimentary manganese carbonate metallogenesis[J]. Mineral Deposites，2020，39(2)：237–255.(in Chinese))
[42] 吴 刚，邢爱国，张 磊. 砂岩高温后的力学特性[J]. 岩石力学与工程学报，2007，26(10)：2 110–2 116.(WU Gang，XING Aiguo，ZHANG Lei. Mechanical chrematistics of sandstone after high temperatures[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(10)：2 110–2 116.(in Chinese))
2023, Vol. 42 
