李加华,陈世万,杨福波,田浪

• 1:贵州大学资源与环境工程学院
• 2:喀斯特地质资源与环境教育部重点实验室

摘要(Abstract)：

【目的】为了认识红层砂岩在加载过程中渗透率演化特征，【方法】通过声发射、核磁共振、渗透试验对贵州赤水红层砂岩加载过程中孔隙和渗透率的演化过程进行了研究，讨论了孔隙分形维数、孔隙率与渗透率之间的关系。【结果】结果显示：砂岩的小孔占总孔隙的33%～37%,大孔占总孔隙的64%～68%;经历多次加载梯度后，砂岩试样S-3、S-4、S-5的渗透率最终分别降低至初始渗透率的71%、63%、54%。【结论】结果表明：砂岩的渗透率在加载全过程中随应力的增加呈线性降低，孔隙率变化表现出明显的阶段性，孔隙压密阶段孔隙率降低，弹性阶段初期孔隙率回升后随应力增长而降低，非稳定破裂阶段孔隙率增大；砂岩的核磁共振T_2谱图呈双峰特征，在试样破坏前，大孔径孔隙比例降低，小孔径孔隙比例升高。NMR大孔分形维数D_(fl)与渗透率线性相关性强；核磁共振成像结果(MRI)可显示砂岩在不同加载阶段内部微孔洞和微裂隙的演化过程，通过对砂岩核磁共振图像处理，可获得不同应力加载过程砂岩孔隙演化规律。

关键词(KeyWords)： 红层砂岩;渗透率;孔隙率;核磁共振;分形维数

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(41902301);; 贵州省科学技术基金([2020]1Y185)

作者(Author): 李加华,陈世万,杨福波,田浪

DOI: 10.13928/j.cnki.wrahe.2023.01.015

参考文献(References)：

• [1] LONDE P.The Malpasset dam failure[J].Engineering Geology,1987,24(1-4):295-329.
• [2] 李世平，李玉寿，吴振业.岩石全应力应变过程对应的渗透率-应变方程[J].岩土工程学报，1995,17(2):13-19.LI Shiping,LI Yushou,WU Zhenye.The permeability-strain equation corresponding to the full stress-strain process of rock[J].Chinese Journal of Geotechnical Engineering,1995,17(2):13-19.
• [3] 李树刚，钱鸣高，石平五.煤样全应力应变过程中的渗透系数-应变方程[J].煤田地质与勘探，2001,29(1):22-24.LI Shugang,QIAN Minggao,SHI Pingwu.Permeability coefficient-strain equation in the process of full stress and strain of coal sample[J].Coal Geology & Exploration,2001,29(1):22-24.
• [4] 蒋长宝，尹光志，李晓泉，等.突出煤型煤全应力-应变全程瓦斯渗流试验研究[J].岩石力学与工程学报，2010,29(S2):3482-3487.JIANG Changbao,YIN Guangzhi,LI Xiaoquan,et al.Experimental study of gas permeability of outburst coal briquettes in complete stress-strain process[J].Chinese Journal of Rock Mechanics and Engineering,2019,29(S2):3482-3487.
• [5] 彭苏萍，屈洪亮，罗立平，等.沉积岩石全应力应变过程的渗透性试验研究[J].煤炭学报，2000,25(2):113-116.PENG Suping,QU Hongliang,LUO Liping,et al.Experimental study on permeability of sedimentary rock in the process of full stress and strain[J].Journal of China Coal Society,2000,25(2):113-116.
• [6] 张守良，沈琛，邓金根.岩石变形及破坏过程中渗透率变化规律的实验研究[J].岩石力学与工程学报，2000,19(S1):885-888.ZHANG Shouliang,SHENG Chen,DENG Jingen.Experimental study on the law of permeability variation in the process of rock deformation and failure[J].Chinese Journal of Rock Mechanics and Engineering,2010,19(S1):885-888.
• [7] 姜振泉，季梁军.岩石全应力-应变过程渗透性试验研究[J].岩土工程学报，2001,23(2):153-156.JIANG Zhenquan,JI Liangjun.Experimental study on permeability of rock in full stress-strain process[J].Chinese Journal of Geotechnical Engineering,2001,23(2):153-156.
• [8] 朱珍德，张爱军，徐卫亚.脆性岩石全应力-应变过程渗流特性试验研究[J].岩土力学，2002,23(5):555-558.ZHU Zhengde,ZHANG Aijun,XU Weiya.Experimental research on complete stress-strain process seepage charactenstics of brittle rock[J].Rock and soil mechanics,2002,23(5):555-558.
• [9] 杨永杰，宋扬，陈绍杰.煤岩全应力应变过程渗透性特征试验研究[J].岩土力学，2007,28(2):381-385.YANG Yongjie,SONG Yang,CHEN Shaojie.Test study on permeability properties of coal specimen in complete stress-strain process[J].Rock and Soil Mechanics,2007,28(2):381-385.
• [10] 韩国锋，王恩志，刘晓丽.岩石损伤过程中的渗流特性[J].土木建筑与环境工程，2011,33(5):41-50.HAN Guofeng,WANG Enzhi,LIU Xiaoli.Seepage Characteristic of rock during damage process[J].Journal of Chongqing Jianzhu University,2011,33(5):41-50.
• [11] 张宏敏.砂岩全应力-应变过程气体渗透特性实验[J].煤炭学报，2009,34(8):1063-1066.ZHANG Hongming.Experiment on gas permeability characteristics of sandstone in full stress-strain process[J].Journal of China Coal Society,2009,34(8):1063-1066.
• [12] 王环玲，徐卫亚，杨圣奇.岩石变形破坏过程中渗透率演化规律的试验研究[J].岩土力学，2006,27(10):1703-1708.WANG Huanling,XU Weiya,YANG Shengqi.Experimental investigation on permeability evolution law during course of deformation and failure of rock specimen[J].Rock and Soil Mechanics,2006,27(10):1703-1708.
• [13] 俞缙，穆康，李宏，等.砂岩渗透性演化特性的孔隙率分布细观模拟分析[J].工程力学，2014,31(11):124-131.YU Jing,JI Kang,LI Hong,et al.Micro-simulation analysis of porosity distribution of sandstone permeability evolution characteristics[J].Engineering Mechanics,2014,31(11):124-131.
• [14] 刘建军，刘先贵.有效压力对低渗透多孔介质孔隙率、渗透率的影响[J].地质力学学报，2001,7(1):41-44.LIU Jianjun,LIU Xiangui.Effect of effective pressure on porosity and permeability of low permeability porous media[J].Journal of Geomechanics,2001,7(1):41-44.
• [15] 黄远智，王恩志.低渗透岩石渗透率对有效应力敏感系数的试验研究[J].岩石力学与工程学报，2007,26(2):410-414.HUANG Yuanzhi,WANG Enzhi.Experimental study on coefficiet of sensitiveness between percolation rate and effective pressure for low permeability rock[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(2):410-414.
• [16] 贺玉龙，杨立中.围压升降过程中岩体渗透率变化特性的试验研究[J].岩石力学与工程学报，2004,23(3):415-419.HE Yulong,YANG Lizhong.Testing study on variational characteristics of rockmass permeability under loading-unloading of confining pressure[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(3):415-419.
• [17] 俞缙，李宏，陈旭，等.渗透压-应力耦合作用下砂岩渗透率与变形关联性三轴试验研究[J].岩石力学与工程学报，2013,32(6):1203-1213.YU Jing,LI Hong,CHEN Xu,et al.Triaxial test study on the correlation between permeability and deformation of sandstone under osmotic pressure-stress coupling[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(6):1203-1213.
• [18] 陈亮，刘建锋，王春萍，等.压缩应力条件下花岗岩损伤演化特征及其对渗透性影响研究[J].岩石力学与工程学报，2014,33(2):287-295.CHEN Liang,LIU Jianfeng,WANG Chunping,et al.Research on damage evolution characteristics of granite and its influence on permeability under compressive stress[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(2):287-295.
• [19] 王伟，徐卫亚，王如宾，等.低渗透岩石三轴压缩过程中的渗透性研究[J].岩石力学与工程学报，2015,34(1):40-47.WANG Wei,XU Weiya,WANG Rubing,et al.Research on permeability of low permeability rock during triaxial compression[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(1):40-47.
• [20] 仵彦卿，曹广祝，丁卫华.CT尺度砂岩渗流与应力关系试验研究[J].岩石力学与工程学报，2005,24(23):4203-4209.WU Yanqing,CHAO Guangzhu,DING Weihua.Experimental study on relation between seepage and stress of sandstone in CT scale[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(23):4203-4209.
• [21] 胡少华，陈益峰，周创兵.北山花岗岩渗透特性试验研究与细观力学分析[J].岩石力学与工程学报，2014,33(11):2200-2209.HU Shaohua,CHEN Yifeng,ZHOU Chuangbing.Laboratory test and mesomechanical analysis of permeability variation of beishan granite[J].Chinese Jouurnal of Rock Mechanics and Engineering,2014,33(11):2200-2209.
• [22] 吴志军，卢槐，翁磊，等.基于核磁共振实时成像技术的裂隙砂岩渗流特性研究[J].岩石力学与工程学报，2021,40(2):263-275.WU Zhijun,LU Huai,WENG Lei,et al.Research on seepage characteristics of fractured sandstone based on real-time NMR imaging technology[J].Chinese Journal of Rock Mechanics and Engineering,2021,40(2):263-275.
• [23] 王顺.基于核磁共振的不同压力下砂岩微观孔径演化规律研究[D].北京：中国矿业大学，2020.WANG Shun.The evolution of sandstone pore size under different pressures based on NMR [D].Beijing:China University of Mining and Technology,2020.
• [24] 杨明，柳磊，张学博，等.不同阶煤孔隙结构与流体特性的核磁共振试验研究[J].中国安全科学学报，2021,31(1):81-88.YANG Ming,LIU Lei,ZHANG Xuebo,et al.Nuclear Magnetic Resonance test research on pore structure and fluid characteristics of different rank coals[J].China Safety Science Journal,2021,31(1):81-88.
• [25] 邵维志，解经宇，迟秀荣，等.低孔隙率低渗透率岩石孔隙率与渗透率关系研究[J].测井技术，2013,37(2):149-153.SHAO Weizhi,XIE Jingyu,CHI Xiurong,et al.On the relation of porosity and permeability in low porosity and low permeability rock[J].Well Logging Technology,2013,37(2):149-153.
• [26] 陈景涛.岩石变形特征和声发射特征的三轴试验研究[J].武汉理工大学学报，2008,30(2):94-96.CHEN Jingtao.Experimental study on triaxial compression deformation and acoustic emission property of rock [J].Journal of Wuhan University of Technology,2008,30(2):94-96.
• [27] GIRI A,TARAFDAR S,GOUZE P,et al.Fractal porestructure of sedimentary rocks:Simulation in 2 dusinga relaxed bidisperse ballistic deposition model [J].Journal of Applied Geophysics,2012,87:40-45.
• [28] LAI Jin,WANG Guiwen.Fractal analysis of tight gassandstones using high-pressure mercury intrusion techniques[J].Journal of Natural Gas Science and Engi-neering,2015,24:185-196.
• [29] 刘世明，唐书恒，霍婷，等.柴达木盆地东缘上石炭统泥页岩孔隙结构及分形特征[J].天然气地球科学，2020,31(8):1069-1081.LIU Shiming,TANG Shuheng,HUO Ting,et al.Pore structure and fractal characteristics of Upper Carboniferous shale in the eastern margin of Qaidam Basin[J].Natural Gas Geoscience,2020,31(8):1609-1081.
• [30] 张娜，寻兴建，王帅栋，等.煤系沉积岩多重分形维数计算及影响因素分析[J].矿业科学学报，2021,6(5):623-632.ZHANG Na,XUN Xingjian,WANG Shuaidong,et al.Calculation of multi-fractal dimension of coal-measure sedimentary rocks and analysis of influencing factors[J].Journal of Mining Science and Technology,2021,6(5):1069-1081.
• [31] 张超谟，陈振标，张占松，等.基于核磁共振T2谱分布的储层岩石孔隙分形结构研[J].石油天然气学报，2007,29(4):80-86.ZHANG Chaomo,CHEN Zhenbiao,ZHANG Zhansong,et al.Research on fractal structure of reservoir rock pore based on Nuclear Magnetic Resonance T2 spectrum distribution[J].Journal of Oil and Gas Technology,2007,29(4):80-86.
• [32] 陈世万.高放废物地质处置花岗岩热力损伤特性研究[D].重庆：重庆大学，2018.CHEN Shiwan.Research on thermal and mechanical damage of granite for geological disposal of high level radioactive waste[D].Chongqing:Chongqing University,2018.
• [33] 韩国锋，王恩志，刘晓丽.压缩带形成过程中渗透性变化试验研究[J].岩石力学与工程学报，2011,30(5):991-997.HAN Guofong,WANG Enzhi,LIU Xaioli.Experimental study of permeability change during compaction bands formation[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(5):991-997.
• [34] DAVID C,MENENDEZ B,ZHU W,etal.Mechanical compaction,microstructures and permeability evolution in sandstones[J].Phys.Chen.Earth(A),2001,26(1/2):45-51.
• [35] ZHU Wenlu,WONG Teng.The transition from brittle faulting to cataclastic flow:permeability evolution[J].Journal of Geophysical research,1997,102(B2),3027-3041.