等幅循环荷载下页岩的变形特性及能量演化机制研究

doi:10.13722/j.cnki.jrme.2020.0451

Abstract
Figure/Table
References (0)
Related Citation (15)

Download: PDF (1820 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract During the development of shale gas fields，the surrounding rock is always in a three-way high-pressure state. After the completion of hydraulic fracturing，the pressures of the shale gas in the fracture and the fracturing fluid will decrease along with the backflow of the high-pressure fracturing fluid. The shale reservoir suffers long-term cyclic loading in the whole process. In order to explore the mechanical properties of shale under cyclic loading，triaxial variable upper and lower limit constant amplitude cyclic loading and unloading experiments on natural shale were performed under different confining pressures by using the RLW–2000 microcomputer servo rock triaxial testing machine，and the deformation characteristics，energy evolution mechanism and damping characteristics of shale were analyzed. The experimental results show that the deformation modulus and the Poisson¢s ratio fluctuate drastically in the few cycles near failure，indicating that the shale is about to fail. Under variable upper and lower limit constant amplitude cyclic loads，the stress reaching the stage of energy weakening at a low confining pressure is smaller than that at a high confining pressure，while the stress at the energy-strengthening stage does the opposite. The stress ratio can be used as the threshold point for energy conversion and distribution of the specimen to predict the energy strengthening and weakening process in the deformation and failure of the specimen. Finally，the relationship between the cumulative horizontal energy and the stress ratio of shale under variable upper and lower limit constant amplitude cyclic loads was clarified，and the evolution law of the damping ratio with the stress ratio and the number of cycles was revealed.

Key words： rock mechanics shale deformation modulus Poisson¢ s ratio energy damping ratio

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	JIANG Changbao1
	2
	WEI Cai1
	2
	ZHUANG Wanjun3
	DUAN Minke2
	4
	CHEN Yufei1
	2
	YU Tang1
	2

Cite this article:

JIANG Changbao1,2,WEI Cai1, et al. Research on deformation characteristics and energy evolution mechanisms of shale under constant amplitude cyclic loading[J]. , 2020, 39(12): 2416-2428.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0451 OR https://rockmech.whrsm.ac.cn/EN/Y2020/V39/I12/2416

[1] 中国石油新闻中心. 我国天然气发展的潜力与挑战[J]. 地质装备，2019，20(3)：4.(CNPC News Center. China¢s natural gas development potential and challenges[J]. Equipment for Geotechnical Engineering，2019，20(3)：4.(in Chinese))
[2] 韩兵，杨宏伟. 不同围压下页岩三轴压缩声发射能量分布特性研究[J]. 煤炭科学技术，2019，47(4)：90–95.(HAN Bing，YANG Hongwei. Study on distribution characteristics of shale triaxial compression acoustic emission energy under different confining pressures[J]. Coal Science and Technology，2019，47(4)：90–95.(in Chinese))
[3] 魏元龙，杨春和，郭印同，等. 单轴循环荷载下含天然裂隙脆性页岩变形及破裂特征试验研究[J]. 岩土力学，2015，36(6)：1 649–1 658. (WEI Yuanlong，YANG Chunhe，GUO Yintong，et al. Experimental investigation on deformation and fracture characteristics of brittle shale with natural cracks under uniaxial cyclic loading[J]. Rock and Soil Mechanics，2015，36(6)：1 649–1 658.(in Chinese))
[4] KUILA U，DEWHURST D N，SIGGINS A F，et al. Stress anisotropy and velocity anisotropy in low porosity shale[J]. Tectonophysics，2011，503(1/2)：34–44.
[5] 王鹏，纪友亮，潘仁芳，等. 页岩脆性的综合评价方法—以四川盆地W区下志留统龙马溪组为例[J]. 天然气工业，2013，33(12)：48–53.(WANG Peng，JI Youliang，PAN Renfang，et al. A comprehensive evaluation methodology of shale brittleness：A case study from the Lower Silurian Longmaxi Fm in Block W，Sichuan Basin[J]. Natural Gas Industry，2013，33(12)：48–53.(in Chinese))
[6] 袁俊亮，邓金根，张定宇，等. 页岩气储层可压裂性评价技术[J]. 石油学报，2013，34(3)：523–527.(YUAN Junliang，DENG Jingen，ZHANG Dingyu，et al. Fracability evaluation of shale gas reservoirs[J]. Acta Petrolei Sinica，2013，34(3)：523–527.(in Chinese))
[7] LI M H，YIN G Z，XU J，et al. Permeability evolution of shale under anisotropic true triaxial stress conditions[J]. International Journal of Coal Geology，2016，165：142–148.
[8] 蒋长宝，陈昱霏，尹光志，等. 中间主应力与层理方向对页岩力学和渗透特性影响的试验研究[J]. 岩石力学与工程学报，2017，36(7)：1 570–1 578.(JIANG Changbao，CHEN Yufei，YIN Guangzhi，et al. Experimental study on the effect of intermediate principal stress and bedding direction on mechanical properties and permeability of shale[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(7)：1 570–1 578.(in Chinese))
[9] 时贤，程远方，蒋恕，等. 页岩微观结构及岩石力学特征实验研究[J]. 岩石力学与工程学报，2014，33(增2)：3 439–3 445.(SHI Xian，CHENG Yuanfang，JIANG Shu，et al. Experimental study of microstructure and rock properties of shale samples[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(Supp.2)： 3 439–3 445.(in Chinese))
[10] 何柏，谢凌志，李凤霞，等. 龙马溪页岩各向异性变形破坏特征及其机制研究[J]. 中国科学：物理学力学天文学，2017，47(11)：107–118.(HE Bai，XIE Lingzhi，LI Fengxia，et al. Anisotropic mechanism and characteristics of deformation and failure of Longmaxi shale[J]. Sci Sin-Phys，Mech Astron，2017，47(11)：107–118.(in Chinese))
[11] SANG G J，ELSWORTH D，MIAO X X，et al. Numerical study of a stress dependent triple porosity model for shale gas reservoirs accommodating gas diffusion in kerogen[J]. Journal of Natural Gas Science and Engineering，2016，32：423–438.
[12] HELSTRUP O A，CHEN Z X，RAHMAN S S. Time-dependent wellbore instability and ballooning in naturally fractured formations[J]. Journal of Petroleum Science and Engineering，2004，43(1/2)：113–128.
[13] HELLER R，VERMYLEN J，ZOBACK M. Experimental investigation of matrix permeability of gas shales[J]. AAPG Bull，2014，98(5)：975–995.
[14] SHUKLA P，KUMAR V，CURTIS M E，et al. Nanoindentation studies on shales[R]. Proceedings of the 47th US Rock Mechanics/ Geomechanics Symposium. CA，USA：San Francisco，2013：167–179.
[15] KUMAR V，CURTIS M E，GUPTA N，et al. Estimation of elastic properties of organic matter in Woodford shale through nanoindentation measurements[R]. Calgary，Alberta，Canada：Society of Petroleum Engineers，2012.
[16] LIU K，OSTADHASSAN M. Microstructural and geomechanical analysis of Bakken shale at nanoscale[J]. Journal of Petroleum Science and Engineering，2017，153：133–144.
[17] GUO Z，LI X Y，LIU C，et al. A shale rock physics model foranalysis of brittleness index，mineralogy and porosity in the Barnett shale[J]. journal of Geophysics and Engineering，2013，10(2)：025006.
[18] RICKMAN R，MULLEN M J，PETRE J E，et al. Apractical use of shale petrophysics for stimulation design optimization：All shale plays are not clones of the Barnett Shale[C]// SPE Technical Conference and Exhibition. [S. 1.]：Society of Petroleum Engineers，2008：354–367.
[19] 李存宝，谢和平，谢凌志. 页岩起裂应力和裂纹损伤应力的试验及理论[J]. 煤炭学报，2017，42(4)：969–976.(LI Cunbao，XIE Heping，XIE Lingzhi，et al. Experimental and theoretical study on the shale crack initiation stress and crack damage stress[J]. Journal of China Coal Society，2017，42(4)：969–976.(in Chinese))
[20] 陈天宇，冯夏庭，张希巍，等. 黑色页岩力学特性及各向异性特性试验研究[J]. 岩石力学与工程学报，2014，33(9)：1 772–1 779. (CHEN Tianyu，FENG Xiating，ZHANG Xiwei，et al. Experimental study on mechanical and anisotropic properties of black shale[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(9)：1 772–1 779.(in Chinese))
[21] 贾长贵，陈军海，郭印同，等. 层状页岩力学特性及其破坏模式研究[J]. 岩土力学，2013，34(增2)：57–61.(JIA Changgui，CHEN Junhai，GUO Yintong，et al. Research on mechanical behaviors and failure modes of layer shale[J]. Rock and Soil Mechanics，2013，34 (Supp.2)：57–61.(in Chinese))
[22] HENG S，GUO Y T，YANG C H，et al. Experimental and theoretical study of the anisotropic properties of shale[J]. International Journal of Rock Mechanics and Mining Sciences，2015，74：58–68.
[23] 衡帅，杨春和，曹义金，等. 基于直剪试验的页岩强度各向异性研究[J]. 岩石力学与工程学报，2014，33(5)：874–883.(HENG Shuai，YANG Chunhe，CAO Yijin，et al. Anisotropy of shear strength of shale based on direct shear test. Chinese Journal of Rock Mechanics and Engineering，2014，33 (5)：874–883.(in Chinese))
[24] 包琛龙. 页岩弹脆性损伤本构模型研究[硕士学位论文][D]. 西安：西安石油大学，2018.(BAO Chenlong. Research on constitutive model of brittle damage of Shale[M. S. Thesis]. Xi¢an：Xi¢an Shiyou University，2018.(in Chinese))
[25] 李庆辉，陈勉，金衍. 含气页岩破坏模式及力学特性的试验研究[J]. 岩石力学与工程学报，2012，31(增2)：3 763–3 771.(LI Qinghui，CHEN Mian，JIN Yan，et al. Experimental research on failure modes and mechanical behaviors of gas-bearing shale[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(Supp.2)：3 763–3 771.(in Chinese))
[26] 李庆辉，陈勉，金衍，等. 页岩气储层岩石力学特性及脆性评价[J]. 石油钻探技术，2012，40(4)：17–22.(LI Qinghui，CHEN Mian，JIN Yan，et al. Rock mechanical properties and brittleness evaluation of shale gas reservoir[J]. Petroleum Drilling Techniques，2012，40(4)：17–22.(in Chinese))
[27] 姚光华，陈乔，刘洪，等. 渝东南下志留统龙马溪组层理性页岩力学特性试验研究[J]. 岩石力学与工程学报，2015，34(增1)：3 313–3319.(YAO Guanghua，CHEN Qiao，LIU Hong，et al. Experiment study on mechanical properties of bedding shale in lower Silurian Longmaxi shale southeast Chongqing[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(Supp.1)：3 313–3 319. (in Chinese))
[28] 张菀乔，廖礼. 渝东北盆缘高陡页岩储层的岩石力学特性[J]. 非常规油气，2017，4(4)：7–11.(ZHANG Wanqiao，LIAO Li. The mechanical properties of rocks in high and steep shale reservoir，Chongqing northeast basin edge[J]. Unconventional Oil and Gas，2017，4(4)：7–11.(in Chinese))
[29] AL-BAZALI T. The impact of water content and ionic diffusion on the uniaxial compressive strength of shale[J]. Egyptian Journal of Petroleum，2013，22(2)：249–260.
[30] 张慧梅，杨更社. 水分及冻融效应对页岩力学特性影响的试验研究[J]. 武汉理工大学学报，2014，36(2)：95–99.(ZHANG Huimei，YANG Gengshe. Experimental studies on moisture and freeze-thaw effect of mechanical properties of shale[J]. Journal of Wuhan University of Technology，2014，36(2)：95–99.(in Chinese))
[31] NIANDOU H，SHAO J F，HENRY J P，et al. Laboratory investigation of the mechanical behaviour of Tournemire shale[J]. International Journal of Rock Mechanics and Mining Sciences，1997，34(1)：3–16.
[32] 魏元龙，杨春和，郭印同，等. 三轴循环荷载下页岩变形及破坏特征试验研究[J]. 岩土工程学报，2015，37(12)：2 262–2 271.(WEI Yuanlong，YANG Chunhe，GUO Yintong，et al. Experimental research on deformation and fracture characteristics of shale under cyclic loading[J]. Chinese Journal of Geotechnical Engineering，2015，37(12)：2 262–2 271.(in Chinese))
[33] 李子运，吴光，黄天柱，等. 三轴循环荷载作用下页岩能量演化规律及强度失效判据研究[J]. 岩石力学与工程学报，2018，37(3)：662–670.(LI Ziyun，WU Guang，HUANG Tianzhu，et al. Variation of energy and criteria for strength failure of shale under traixial cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(3)：662–670.(in Chinese))
[34] 王玉满，黄金亮，王淑芳，等. 四川盆地长宁、焦石坝志留系龙马溪组页岩气刻度区精细解剖[J]. 天然气地球科学，2016，27(3)：423–432.(WANG Yuman，HUANG Jinliang，WANG Shufang，et al. Dissection of two calibrated areas of the Silurian Longmaxi Formation，Changning and Jiaoshiba，Sichuan Basin[J]. Natural Gas Geoscience，2016，27(3)：423–432.(in Chinese))
[35] 蔡美峰. 岩石力学与工程[M]. 北京：科学出版社，2013：50–51.(CAI Meifeng. Rock mechanics and engineering[M]. Beijing：Science Press，2013：50–51.(in Chinese))
[36] 谢和平，彭瑞东，鞠杨，等. 岩石变形破坏过程中的能量耗散分析[J]. 岩石力学与工程学报，2004，23(21)：3 565–3 570.(XIE Heping，PENG Ruidong，JU Yang，et al. Energy dissipation of rock deformation and fracture[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(21)：3 565–3 570.(in Chinese))
[37] 中华人民共和国行业标准编写组. DL/T 5355—2006水电水利工程土工试验规程[S]. 北京：中国电力出版社，2009.(The Professional Standards Compilation Group of People¢s Republic of China. DL/T 5355—2006 Code for soil texts for hydropower and water conservancy engineering[S]. Beijing：China Electric Power Press，2009.(in Chinese))