压缩应力作用下I型裂缝前端拉压分区特征研究

doi:10.13722/j.cnki.jrme.2023.0506

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摘要储层应力条件下水力裂缝前端应力分布特征会影响裂缝扩展及压裂改造效果。为研究水力裂缝前端拉压分区特征，采用自主设计的可视化压裂试验装置对压缩应力作用下Ι型裂缝前端力学行为进行研究。提出利用数字图像相关法识别裂缝前端拉压分界线的方法，发现Ι型裂缝前端拉伸区长度与裂缝尖端张开位移呈线性正相关。裂缝起裂前，拉伸区的范围及长度随着缝尖应力强度因子的增大而增大；裂缝起裂扩展后，拉伸区的范围及长度保持恒定。研究表明，随着裂缝两侧远场压缩应力的增大，Ι型裂缝前端拉伸区的范围及长度会减小，远场应力对拉伸区尺度范围的影响程度会降低。探讨拉伸区内的弹性区与断裂过程区分界，表征拉伸区与断裂过程区的位置关系，并提出断裂过程区指数的概念，发现拉伸区内过程区指数会随着地应力的增大而增大，表明在高应力作用下拉伸区内以非线性断裂为主导。

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	唐梅荣1
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	张广清1
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	陈磊1

关键词 ：岩石力学, 水力压裂, 数字图像相关法, 断裂力学, 断裂过程区, 地应力

Abstract：The stress distribution characteristics ahead of the hydraulic fracture under in-situ stresses will affect the fracture propagation and stimulation effect. In this paper，the mechanical behaviors and the tension-compression stress distribution ahead of the Mode-I fracture under in-situ stresses were studied using a self-designed visual fracturing experimental device. Based on the digital image correlation，a method to identify the boundary of the tension-compression zones ahead of the Mode-I fracture tip was proposed，from which the positive linear correlation was found between the tension zone length and the fracture tip opening displacement. Before fracture initiation，the range and length of the tension zone will increase with the stress intensity factor. During the fracture propagation，the range and length of the tension zone remain constant. With the increase of in-situ stress，the length of the tension zone will decrease，and the influence of in-situ stress on the tension zone will decrease. The boundary of fracture process zone and elastic zone in tension zone was investigated，and the position of fracture process zone and the tension zone was described. The concept of process zone index in the tension zone was proposed，which was found increase with in-situ stress，indicating that nonlinear fracture is dominant in the tension zone under high in-situ stress.

Key words： rock mechanics hydraulic fracturing digital image correlation fracture mechanics fracture process zone in-situ stress

引用本文:

唐梅荣1，2，张广清1，3，陈磊1. 压缩应力作用下I型裂缝前端拉压分区特征研究[J]. 岩石力学与工程学报, 2024, 43(2): 322-332.
TANG Meirong1，2，ZHANG Guangqing1，3，CHEN Lei1. Experimental investigation on tension zone in front of mode-Ι fracture under in-situ stresses. , 2024, 43(2): 322-332.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2023.0506 或 http://rockmech.whrsm.ac.cn/CN/Y2024/V43/I2/322

[16]	张广清，陈勉，金衍，等. 围压下泥岩断裂韧性测试与解释方法[J]. 工程地质学报，2004，12(4)：431-435.(ZHANG Guangqing，CHEN Mian，JIN Yan，et al. Measurement and interpretation of shale toughness under confining pressures[J]. Journal of Engineering Geology，2004，12(4)：431-435.(in Chinese))
[25]	代树红，马胜利，潘一山. 数字图像相关法测定岩石I-II复合型裂纹应力强度因子[J]. 岩土工程学报，2013，35(7)：1 362-1 368. (DAI Shuhong，MA Shengli，PAN Yishan. Evaluation of mixed-mode I-II stress intensity factors of rock utilizing digital image correlation method[J]. Chinese Journal of Geotechnical Engineering，2013，35(7)：1 362-1 368.(in Chinese))
[28]	赵波，张广清，唐梅荣，等. 长期注水对致密砂岩油藏岩石力学性质影响机制研究[J]. 岩土力学，2019，40(9)：3 344-3 350.(ZHAO Bo，ZHANG Guangqing，TANG Meirong，et al. Mechanism of the effect of long-term water injection on mechanical properties of tight sandstone[J]. Rock and Soil Mechanics，2019，40(9)：3 344-3 350. (in Chinese))
[30]	DE SILVA V R S，RANJITH P G，PERERA M S A，et al. Investigation of the mechanical，microstructural and mineralogical morphology of soundless cracking demolition agents during the hydration process[J]. Materials Characterization，2017，130：9-24.
[32]	BLABER J，ADAIR B，ANTONIOU A. Ncorr：Open-Source 2D digital image correlation matlab software[J]. Experimental Mechanics，2015，55(6)：1 105-1 122.
[33]	王博，俞立平，潘兵. 数字图像相关方法中匹配及过匹配形函数的误差分析[J]. 试验力学，2016，31(3)：291-298.(WANG Bo，YU Liping，PAN Bing. On the error analysis of matched and overmatched shape function in digital image correlation method[J]. Journal of Experimental Mechanics，2016，31(3)：291-298.(in Chinese))
[36]	LIN Q，LABUZ J F. Fracture of sandstone characterized by digital image correlation[J]. International Journal of Rock Mechanics and Mining Sciences，2013，60：235-245.
[38]	LIN Q，WANG S，PAN P Z，et al. Imaging opening-mode fracture in sandstone under three-point bending：A direct identification of the fracture process zone and traction-free crack based on cohesive zone model[J]. International Journal of Rock Mechanics and Mining Sciences，2020，136(July)：104516.
[40]	傅帅旸，李海波，李晓锋. 基于DIC方法与声发射的花岗岩断裂过程区范围研究[J]. 岩石力学与工程学报，2022，41(12)：2 497- 2 508.(FU Shuaiyan，LI Haibo，LI Xiaofeng. Research on the range of fracture process zone of granite based on DIC and acoustic emission[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(12)：2 497-2 508.(in Chinese))
[42]	GAO Y，DONG Y，CHEN L，et al. An improved model for evaluating the brittleness of shale oil reservoirs based on dynamic elastic properties：a case study of lucaogou formation，Jimusar sag[J]. Geofluids，2022：6711977.
[43]	DUTLER N，NEJATI M，VALLEY B，et al. On the link between fracture toughness，tensile strength，and fracture process zone in anisotropic rocks[J]. Engineering Fracture Mechanics，2018，201(5)：56-79.
[26]	HOSSAIN M M，RAHMAN M K，RAHMAN S S. Hydraulic fracture initiation and propagation：roles of wellbore trajectory，perforation and stress regimes[J]. Journal of Petroleum Science and Engineering，2000，27(3/4)：129-149.
[11]	LIN Q，WAN B，WANG S，et al. Visual detection of a cohesionless crack in rock under three-point bending[J]. Engineering Fracture Mechanics，2019，211：17-31.
[41]	BA?ANT Z P，PLANAS J. Fracture and size effect in concrete and other quasibrittle materials[M]. Florida：CRC Press，1998：13-16.
[35]	CHEN H，YU T，WANG X，et al. Elasticity and plasticity[M]. Beijing：China Architecture and Building Press，2005：115-121.
[1]	程远方，王桂华，王瑞和. 水平井水力压裂增产技术中的岩石力学问题[J]. 岩石力学与工程学报，2004，23(14)：2 463-2 466.(CHENG Yuanfang，WANG Guihua，WANG Ruihe. Rock mechanics problems in horizontal well fracturing[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(14)：2 463-2 466.(in Chinese))
[4]	REINICKE A，RYBACKI E，STANCHITS S，et al. Hydraulic fracturing stimulation techniques and formation damage mechanisms—Implications from laboratory testing of tight sandstone-proppant systems[J]. Geochemistry，2010，70：107-117.
[6]	陈勉，金衍，张广清. 石油工程岩石力学基础[M]. 北京：石油工业出版社，2011：75-93.(CHEN Mian，JIN Yan，ZHANG Guangqing. Petroleum rock mechanics[M]. Beijing：Petroleum Industry Press，2011：75-93.(in Chinese))
[7]	ATKINSON B K. Fracture mechanics of rock[M]. London：Academic Press，1989：12-14.
[9]	ZHANG G，XING Y，WANG L. Comprehensive sandstone fracturing characterization：Integration of fiber Bragg grating，digital imaging correlation and acoustic emission measurements[J]. Engineering Geology，2018，246(August)：45-56.
[2]	毕振辉，王磊，杨涵志，等. 多簇水力裂缝起裂与扩展物理模拟试验系统研制及验证[J]. 岩石力学与工程学报，2021，40(11)： 2 273-2 285.(BI Zhenhui，WANG Lei，YANG Hanzhi，et al. Development and verification of a physical simulation experiment system for initiation and propagation of multiple clusters of hydraulic fractures[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(11)：2 273-2 285.(in Chinese))
[3]	杨潇，张广清，刘志斌，等. 压裂过程中水力裂缝动态宽度试验研究[J]. 岩石力学与工程学报，2017，36(9)：2 232-2 237.(YANG Xiao，ZHANG Guangqing，LIU Zhibin，et al. Experimental research on the variation of fracture width in hydraulic fracturing process[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(9)：2 232-2 237.(in Chinese))
[5]	郭建春，何颂根，邓燕. 弹塑性地层水力压裂起裂模式及起裂压力研究[J]. 岩土力学，2015，36(9)：2 494-2 500.(GUO Jianchun，HE Songgen，DENG Yan. Study of hydraulic fracturing initiation mode and initiation pressure of elastoplastic formation[J]. Rock and Soil Mechanics，2015，36(9)：2 494-2 500.(in Chinese))
[8]	MARUYAMA T. Stress fields in the neighborhood of a crack[J]. Bulletin of the Earthquake Research Institute，The University of Tokyo，1969，47：1-29.
[10]	ELICES M，GUINEA G V，GÓMEZ J，et al. The cohesive zone model：Advantages，limitations and challenges[J]. Engineering Fracture Mechanics，2001，69(2)：137-163.
[12]	NIE Y，ZHANG G，XING Y，et al. Influence of water-oil saturation on the fracture process zone：a modified Dugdale-Barenblatt model[J]. Energies，2018，11(11)，https：//doi.org/10.3390/en11112882.
[13]	PAN R，ZHANG G，LI S，et al. Influence of the fracture process zone on fracture propagation mode in layered rocks[J]. Journal of Petroleum Science and Engineering，2021，202：108524.
[15]	CHEN L，ZHANG G，ZOU Z，et al. Experimental observation of fracture process zone in sandstone from digital imaging[C]// Proceedings of the 54th U.S. Rock Mechanics/Geomechanics Symposium. Golden：Onepetro，2020：1 741.
[18]	ZHAO P，GRAY K E. Analytical and machine-learning analysis of hydraulic fracture-induced natural fracture slip[J]. SPE Journal，2021，26(4)：1 722-1 738.
[20]	赵立强，刘飞，王佩珊，等. 复杂水力裂缝网络延伸规律研究进展[J]. 石油与天然气地质，2014，35(4)：8.(ZHAO Liqiang，LIU Fei，WANG Peishan，et al. A review of creation and propagation of complex hydraulic fracture network[J]. OIL and Gas Geology，2014，35(4)：8.(in Chinese))
[22]	LU H，CARY P D. Deformation measurements by digital image correlation：implementation of a second-order displacement gradient[J]. Experimental mechanics，2000，40(4)：393-400.
[23]	CHEN L，ZHANG G，ZHANG M，et al. Experimental investigation on the slip nucleation of laminated shale during fracture propagation[J]. Rock Mechanics and Rock Engineering，2023，56(5)：3 595-3 610.
[14]	刘志斌，张广清，晏小和，等. 裂纹前端低孔隙压力区对岩石断裂性质的影响[J]. 岩土力学，2017，38(增2)：75-81.(LIU Zhibin，ZHANG Guangqing，YAN Xiaohe，et al. Effect of low pore pressure zone around crack front on rock fracture properties[J]. Rock and Soil Mechanics，2017，38(Supp.2)：75-81.(in Chinese))
[17]	徐积刚，华文，董世明. 围压对巴西圆盘应力强度因子影响的数值分析[J]. 固体力学学报，2014，(增1)：147-152.(XU Jigang，HUA Wen，DONG Shiming. Numerical analysis of effects of confining pressure on the stress intensity factors for braziliandisk[J]. Chinese journal of solid mechanics，2014，(Supp.1)：147-152.(in Chinese))
[19]	CIEZOBKA J，COURTIER J，WICKER J. Hydraulic fracturing test site (HFTS)-project overview and summary of results[C]// Proceedings of the SPE/AAPG/ SEG Unconventional Resources Technology Conference. [S.l.]：OnePetro，2018：D023S023R002.
[21]	陈磊，张广清，张敏，等. 水力裂缝穿越非连续面扩展时的断裂过程研究[J]. 岩土力学，2023，44(1)：159-170.(CHEN Lei，ZHANG Guangqing，ZHANG Min，et al. Propagation process of hydraulic fracture crossing an orthogonal discontinuity[J]. Rock and Soil Mechanics，2023，44(1)：159-170.(in Chinese))
[24]	袁媛，潘鹏志，赵善坤，等. 基于数字图像相关法的含填充裂隙大理岩单轴压缩破坏过程研究[J]. 岩石力学与工程学报，2018，37(2)：339-351.(YUAN Yuan，PAN Pengzhi，ZHAO Shankun，et al. The failure process of marble with filled crack under uniaxial compression based on digital image correlation[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(2)：339-351.(in Chinese))
[27]	李庆辉，李少轩. 超深层砂岩储层岩石力学特性试验研究[J]. 岩石力学与工程学报，2021，40(5)：948-957.(LI Qinghui，LI Shaoxuan. Experimental study on mechanical properties of ultra-deep sandstone[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(5)：948-957.(in Chinese))
[29]	CHEN L，ZHANG G，LYU Y，et al. Visualization study of hydraulic fracture propagation in unconsolidated sandstones[C]// Proceedings of the 53rd U.S. Rock Mechanics/Geomechanics Symposium. New York：Onepetro，2019：1 837.
[31]	孙文进，金爱兵，王树亮，等. 基于DIC的高温砂岩劈裂力学特性研究[J]. 岩土力学，2021，42(2)：511-518.(SUN Wenjin，JIN Aibing，WANG Shuliang，et al. Study on sandstone split mechanical properties under high temperature based on the DIC technology[J]. Rock and Soil Mechanics，2021，42(2)：511-518.(in Chinese))
[34]	ZHANG G Q，CHEN M. Dynamic fracture propagation in hydraulic re-fracturing[J]. Journal of Petroleum Science and Engineering，2010，70(3/4)：266-272.
[37]	CHEN L，ZHANG G，ZOU Z，et al. The effect of fracture growth rate on fracture process zone development in quasi-brittle rock[J]. Engineering Fracture Mechanics，2021，258(August)：108086.
[39]	FUNATSU T，SETO M，SHIMADA H，et al. Combined effects of increasing temperature and confining pressure on the fracture toughness of clay bearing rocks[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(6)：927-938.