许鹏祥,陈向东,刘钊,程鑫,屈怡倩,李秋实,马春晓,吴汉宁

• 1:西北大学大陆动力学国家重点实验室
• 2:西北大学地质系
• 3:中国石油长庆油田分公司第五采油厂
• 4:中国石油长庆油田分公司第八采油厂

摘要(Abstract)：

致密砂岩储层中水、石油或天然气等流体赋存可能会对致密砂岩的力学特征产生影响。选取鄂尔多斯盆地蟠龙地区延长组致密砂岩，利用YSZS-2000型多功能电液伺服岩石真三轴试验机对不同含油和含水饱和度致密砂岩力学特征进行了研究。结果表明：(1)含油性对砂岩的峰值应力和弹性模量产生弱化作用，表现为峰值应力和弹性模量随着含油饱和度的增大而减小，“准饱和”时峰值应力可下降5.35%,弹性模量可下降11.38%;(2)含水砂岩根据其吸水特性曲线分为Pa型与Pb型，含水性对砂岩的峰值应力产生弱化作用，饱和时Pa型砂岩峰值应力可下降11.58%,Pb型砂岩峰值应力可下降15.95%;(3)观察实验后浸油砂岩内部结构发现，油集中分布于砂岩矿物间裂隙，对破裂面产生润滑作用从而降低了砂岩的承载力。本研究成果可以对致密油气的开发提供可靠依据。

关键词(KeyWords)： 真三轴实验;致密砂岩;力学特征;峰值应力;弹性模量

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41304049)

作者(Author): 许鹏祥,陈向东,刘钊,程鑫,屈怡倩,李秋实,马春晓,吴汉宁

DOI: 10.19509/j.cnki.dzkq.2022.0146

参考文献(References)：

• [1] 孙龙德，邹才能，贾爱林，等.中国致密油气发展特征与方向[J].石油勘探与开发，2019,46(6):1015-1026.Sun L D,Zou C N,Jia A L,et al.Development characteristics and orientation of tight oil and gas in China[J].Petroleum Exploration and Development,2019,46(6):1015-1026 (in Chinese with English abstract).
• [2] 邹才能，翟光明，张光亚，等.全球常规-非常规油气形成分布、资源潜力及趋势预测[J].石油勘探与开发，2015,42(1):13-25.Zou C N,Zhai G M,Zhang G Y,et al.Formation,distribution,potential and prediction of global conventional and unconventional hydrocarbon resources[J].Petroleum Exploration and Development,2015,42(1):13-25 (in Chinese with English abstract).
• [3] 仝少凯，高德利.水力压裂基础研究进展及发展建议[J].石油钻采工艺，2019,41(1):101-115.Tong S K,Gao D L.Advances and suggestions on basic research of hydraulic fracturing[J].Oil Drilling & Production Technology,2019,41(1):101-115 (in Chinese with English abstract).
• [4] 邹才能，潘松圻，荆振华，等.页岩油气革命及影响[J].石油学报，2020,41(1):1-12.Zou C N,Pan S Q,Jing Z H,et al.Shale oil and gas revolution and its influence[J].Acta Petrologica Sinica,2020,41(1):1-12 (in Chinese with English abstract).
• [5] 陈乐勇.低渗透储层岩体压裂裂纹扩展机理研究[D].成都：西南石油大学，2015.Chen L Y.Study on fracture propagation mechanism of rock mass in low permeability reservoir[D].Chengdu:Southwest Petroleum University,2015 (in Chinese with English abstract).
• [6] 李铭辉.真三轴应力条件下储层岩石的多物理场耦合响应特性研究[D].重庆：重庆大学，2016.Li M H.Multi-physical field coupling response characteristics of reservoir rocks under true triaxial stress[D].Chongqing:Chongqing University,2016 (in Chinese with English abstract).
• [7] 秦朝.三轴围压条件下岩石力学性质的实验研究[D].成都：西南石油大学，2014.Qin Z.Experimental study on mechanical properties of rock undertriaxial confining pressure[D].Chengdu:Southwest Petroleum University,2014 (in Chinese with English abstract).
• [8] 王友新.高应力条件下大理岩真三轴卸载力学特性研究[D].昆明：昆明理工大学，2017.Wang Y X.Study on mechanical properties of true triaxial unloading of marble under high stress[D].Kunming:Kunming University of Science and Technology,2017 (in Chinese with English abstract).
• [9] 林伯韬，史璨，庄丽，等.基于真三轴实验研究超稠油储集层压裂裂缝扩展规律[J].石油勘探与开发，2020,47(3):608-616.Lin B T,Shi C,Zhuang L,et al.Study on fracture propagation behavior in ultra-heavy oil reservoir beased on true triaxial experiments[J].Petroleum Exploration and Development,2020,47(3):608-616 (in Chinese with English abstract).
• [10] Arash J,Mohammad E N.Rock physics analysis and modelling using well logs and seismic data for characterising a heterogeneous sandstone reservoir in SW of Iran[J].Exploration Geophysics,2021,52(4):446-461.
• [11] Marek K.Recent advances in studies of the strength of rocks under true triaxial compression Condition[J].Arch.Min.Sci.,2013,58(4):1177-1200.
• [12] Dhara S,Misra N L,Aggarwal S K,et al.Determinations of low atomic number elements in real uranium oxide samples using vacuum chamber total reflection x-ray fluorescence[J].X-Ray Spectrometry,2014,43(2):108-111.
• [13] He M C,Miao J L,Feng J L.Rock burst process of limestone and its acoustic emission characteristics under true-triaxial unloading conditions[J].International Journal of Rock Mechanics & Mining Sciences,2010,47(2):286-298.
• [14] Han X,Wang S X,Tang G Y,et al.Coupled effects of pressure and frequency on velocities of tight sandstones saturated with fluids:Measurements and rock physics modelling[J].Geophysical Journal International,2021,226(2):1308-1321.
• [15] Pan X P,Zhang G Z,Chen J J.The construction of shale rock physics model and brittleness prediction for high-porosity shale gas-bearing reservoir[J].Petroleum Science,2020(prepublish):
• [16] Li G L,Li G F,Wang Y Z,et al.A rock physics model for estimating elastic properties of Upper Ordovician Lower Silurian mudrocks in the Sichuan Basin,China[J].Engineering Geology,2020,266:105460.
• [17] Zhang L,Ba J,Carcione J M.A rock physics model to determine the pore microstructure of cracked porous rocks[J].Geophysical Journal International,2020,223(1):622-631.
• [18]施维成.粗粒土真三轴试验与本构模型研究[D].南京：河海大学，2008.Shi W C,Study on true triaxial test and constitutive model of coarse-grained soil[D].Nanjing:Hohai University,2008 (in Chinese with English abstract).
• [19] 王四巍.单轴和三轴应力下塑性混凝土性能研究[D].郑州：郑州大学，2010.Wang S W.Study on the performance of plastic concrete under uniaxial and triaxial stress[D].Zhengzhou:Zhengzhou University,2010 (in Chinese with English abstract).
• [20] 扈萍，黄茂松，马少坤，等.粉细砂的真三轴试验与强度特性[J].岩土力学，2011,32(2):465-470.Hu P,Huang M S,Ma S K,et al.True triaxial test and strength characteristics of silty sand[J].Rock and Soil Mechanics,2011,32(2):465-470 (in Chinese with English abstract).
• [21] 杨利国，骆亚生，王瑞瑞.不同中主应力下压实黄土变形特性的真三轴试验研究[J].水文地质工程地质，2016,43(5):76-80.Yang L G,Luo Y S,Wang R R.True triaxial test on deformation characteristics of compacted loess with different intermediate principal stresses[J].Hydrogeology and Engineering Geology,2016,43(5):76-80(in Chinese with English abstract).
• [22] 杨继华，刘汉东.岩石强度和变形真三轴试验研究[J].华北水利水电学院学报，2007(3):66-68.Yang J H,Liu H D.True triaxial experimental study on rock strength and deformation[J].Journal of North China Institute of Water Resources and Electric Power,2007(3):66-68 (in Chinese with English abstract).
• [23] Colb Ac K P,Wiid B L.The influence of moisture content on the compressive strength of rocks[C].Proc.Rock Mech.Symp.Tronto,1965.
• [24] Vásárhelyi B,Ván P.Influence of water content on the strength of rock[J].Engineering Geology,2005,84(1):70-74.
• [25] 周翠英，彭泽英，尚伟，等.论岩土工程中水-岩相互作用研究的焦点问题：特殊软岩的力学变异性[J].岩土力学，2002,23(1):124-128.Zhou C Y,Peng Z Y,Shang W,et al.On the key problem of the water-rock interaction in geoengineering mechanical variability of special weak rocks and some development trends[J].Rock and Soil Mechanics,2002,23(1):124-128 (in Chinese with English abstract).
• [26] 王东，王丁，韩小刚，等.侧向变形控制下的灰岩破坏规律及其峰后本构关系[J].煤炭学报，2010,35(12):76-81.Wang D,Wang D,Han X G,et al.Limestone failure law and post-failure constitutive relation in the control of lateral deformation[J].Journal of China Coal Society,2010,35(12):76-81 (in Chinese with English abstract).
• [27] 李男，徐辉，胡斌.干燥与饱水状态下砂岩的剪切蠕变特性研究[J].岩土力学，2012,33(2):439-443.Li N,Xu H,Hu B.Shear creep characteristics of sandstone under dry and saturated states[J].Rock and Soil Mechanics,2012,33(2):439-443 (in Chinese with English abstract).
• [28] 曹洋兵，陈玉华，张朋，等.单轴压缩条件下不同含水率黑云母二长花岗岩破坏特征与机制[J].地质科技通报，2021,40(3):163-172.Cao Y B,Chen Y H,Zhang P,et al.Failure characteristics and mechanism of biotite monzogranite with different water content under uniaxial compression[J].Bulletin of Geological Science and Technology,2021,40(3):163-172.
• [29] 杨勇.低渗透岩石水力压力裂纹扩展的CT扫描[J].采矿与安全工程学报，2013,30(5):739-743.Yang Y.CT scanning of hydraulic pressure crack propagation in low permeability rock[J].Journal of Mining and Safety Engineering,2013,30(5):739-743 (in Chinese with English abstract).
• [30] 尹光志，李贺，鲜学福，等.工程应力变化对岩石强度特性影响的试验研究[J].岩土工程学报，1987,9(2):20-27.Yin G Z,Li H,Xian X F,et al.Experimental study on the influence of engineering stress change on rock strength characteristics[J].Chinese Journal of Geotechnical Engineering,1987,9(2):20-27 (in Chinese with English abstract).
• [31] 扈萍，黄茂松，马少坤，等.粉细砂的真三轴试验与强度特性[J].岩土力学，2011,32(2):465-470.Hu P,Huang M S,Ma S K,et al.True triaxial test and strength characteristics of silty sand[J].Rock and Soil Mechanics,2011,32(2):465-470 (in Chinese with English abstract).
• [32] 贺洲.低渗透储层孔隙流体压力预测方法及应用[J].化工设计通讯，2019,45(12):247-248.He Z.Prediction method and application of pore fluid pressure in low permeability reservoir[J].Chemical Design Communication,2019,45(12):247-248 (in Chinese with English abstract).
• [33] 蔡生娟，李宏兵，潘豪杰.基于岩石物理模板的孔隙度非敏感流体因子构建方法及应用[J].地球物理学进展，2020,35(3):932-939.Cai S J,Li H B,Pan H J.Construction method of porosity non-sensitive fluid factor based on rock physical template and its application[J].Progress in Geophysics(in Chinese),2020,35(3):932-939 (in Chinese with English abstract).
• [34] 陈昱霏.真三轴应力条件下页岩力学特征及渗透机理研究[D].重庆：重庆大学.2018.Chen Y F.Study on mechanical characteristics and permeability mechanism of shale under true triaxial stress[D].Chongqing:Chongqing University,2018 (in Chinese with English abstract).
• [35] 高辉，朱耿博仑，王泫懿，等.鄂尔多斯盆地延长组致密砂岩储层微观孔喉特征差异及其成因[J].石油与天然气地质，2019,40(2):302-312.Gao H,Zhug B L,Wang X Y,et al.Microscopic pore throat characteristics and its origin in tight sandstone reservoirs of Yanchang Formation,Ordos Basin[J].Oil & Gas Geology,2019,40(2):302-312 (in Chinese with English abstract).
• [36] Martin C D,Chandler N A.The progressive fracture of Lac du Bonnet granite[J].International Journal of Rock Mechanics & Mining Science & Geomechanics Abstracts,1994,31(6):643-659.
• [37] 朱泽奇，盛谦，冷先伦，等.三峡花岗岩起裂机制研究[J].岩石力学与工程学报，2007,26(12):2570-2575.Zhu Z Q,Sheng Q,Leng X L,et al.Study on crack initiation mechanism of Three Gorges granite[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(12):2570-2575 (in Chinese with English abstract).
• [38] 汪斌，朱杰兵，严鹏，等.大理岩损伤强度的识别及基于损伤控制的参数演化规律[J].岩石力学与工程学报，2012,31(增刊2):3967-3973.Wang B,Zhu J B,Yan P,et al.Identification of damage strength and parameter evolution of marble based on damage control[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(S2):3967-3973 (in Chinese with English abstract).
• [39] 王宇，李晓，武艳芳，等.脆性岩石起裂应力水平与脆性指标关系探讨[J].岩石力学与工程学报，2014,33(2):264-275.Wang Y,Li X,Wu Y F,et al.Research on relationship between crack initiation stress level and brittleness index for brittle rock[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(2):264-275 (in Chinese with English abstract).
• [40] 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 S H,Chen Y F,Zhou C B.Experimental study and meso-mechanical analysis of permeability characteristics of Beishan granite[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(11):2200-2209 (in Chinese with English abstract).