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| Experimental study on the crucial effect of test system compliance on hydraulic fracturing in-situ stress measurements#br# |
| QIN Xianghui1，CHEN Qunce1，ZHAO Xingguang2，ZHANG Chongyuan1，SUN Dongsheng1，MENG Wen1，FENG Chengjun1，WANG Bin1，YANG Yuehui3 |
(1. Key Laboratory of Neotectonic Movement and Geohazard，Institute of Geomechanics，Chinese Academy of Geological Sciences，Beijing 100081，China；2. Beijing Research Institute of Uranium Geology，Beijing 100029，China；3. School of Engineering and Technology，China University of Geosciences，Beijing 100083，China)
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Abstract In order to study the effect of test system compliance on the determination of hydraulic fracturing parameters and principal stresses in detail，hydraulic fracturing field tests were performed by using a recently improved single-cycle hydraulic fracturing equipment which can monitor the pressure of wellhead，test interval and packers during the entire test process. The results show that the values of the HF parameters Ps，Pr，Pb and SH derived from the wellhead pressure data are generally larger than those determined from the test interval pressure data due to the effect of the test sytem compliance. The absolute difference of Ps，Pr，Pb and SH between the wellhead and test interval results are 0–0.375，0–0.75，0.125–0.875 and －0.25–0.875 MPa，respectively，and the relative differences mainly range within 0–5%，0–6%，0–4% and 0–5%，respectively. The absolute difference value of Pb is considered to be controlled not only by the test system compliance but also by the mechanical properties of the strata and in situ stress state. The affecting mechanism of test system compliance on the Pr absolute difference magnitude is relatively complex，and test interval flow rate data should be supplemented. In addition，a new method referred as shut-in test was proposed to obtain the shut-in pressure more accurately during HF tests. The results relating to shut-in tests indicate that the method can effectively eliminate the influence of the test system compliance and the pipeline frictional resistance. It is suggested that，when only the wellhead pressure data is used，Ps，Pr，Pb and SH should be revised according to a maximum proportion of 5%，6%，4% and 5%.
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[1] TOWNEND J，ZOBACK M D. How faulting keeps the crust strong[J]. Geology，2000，28(5)：399–402.
[2] SCHOLZ C H. The mechanics of earthquake and faulting[M]. Cambridge：Cambridge University Press，2002：101–110.
[3] ZANG A，STEPHANSSON O. Stress field of the earth's crust [M]. Netherlands：Springer，2010：89–111.
[4] 谭成轩，孙炜锋，孙 叶，等. 地应力测量及其地下工程应用的思考[J]. 地质学报，2006，80(10)：1 627–1 632.(TAN Chengxuan，SUN Weifeng，SUN Ye，et al. A consideration on in-situ stress measuring and its underground engineering application[J]. Acta Geologica Sinica，2006，80(10)：1 627–1 632.(in Chinese))
[5] 王成虎，刘立鹏，郭启良，等. 地应力测量数据分析对工程稳定性控制设计的意义[J]. 工程地质学报，2008，16(增)：377–381. (WANG Chenghu，LIU Lipeng，GUO Qiliang，et al. One method to analyze the measured in-situ stress data and its significance to the project stability design[J]. Journal of Engineering Geology，2008，16(Supp.)：377–381.(in Chinese))
[6] STEPHASSON O，ZANG A. ISRM suggested methods for rock stress estimation-part 5：establishing a model for the in situ stress at a given site[J]. Rock Mechanics and Rock Engineering，2012，45：955–969.
[7] 郭啟良，赵仕广，丁立丰，等. 地下硐室围岩应力状态及相关参数测量结果的分析与评价[J]. 岩石力学与工程学报，2007，26(增1)：3 361﹣3 366.(GUO Qliang，ZHAO Shiguang，DING Lifeng，et al. Analysis and evaluation of measurement results of in-situ stress state and related parameters for underground surrounding rockmass of underground cavern[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.1)：3 361﹣3 366.(in Chinese))
[8] 朱维申，赵成龙，周 浩，等. 当前岩石力学研究若干关键问题的思考与认识[J]. 岩石力学与工程学报，2015，34(4)：1﹣10.(ZHU Weishen，ZHAO Chenglong，ZHOU Hao，et al. Some considerations and recognition on several key issues of prisent study of rock mechanics[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(4)：1﹣10.(in Chinese))
[9] AMADEI B，STEPHANSSON O. Rock stress and its measurement[M]. London：Chapman and Hall，1997：95–120.
[10] LJUNGGREN C，CHANG Y，JANSON T. An overview of rock stress measurement methods[J]. International Journal of Rock Mechanics and Mining Sciences，2003，40(7)：975–989.
[11] 王成虎. 地应力主要测试和估算方法回顾与展望[J]. 地质论评，2014，60(5)：971﹣995.(WANG Chenghu. Brief review and outlook of main estimate and measurement methods for in-situ stresses in rock mass[J]. Geological Review，2014，60(5)：971﹣995.(in Chinese))
[12] HAIMSON B C，CORNET F H. ISRM suggested methods for rock stress estimation-part 3：hydraulic fracturing(HF) and/or hydraulic testing of pre-existing fractures(HTPF)[J]. International Journal of Rock Mechanics and Mining Sciences，2003，40：1 011–1 020.
[13] 谢和平，高 峰，鞠 杨. 深部岩体力学研究与探索[J]. 岩石力学与工程学报，2015，34(11)：2 161﹣2 178.(XIE Heping，GAO Feng，JU Yang. Research and development of rock mechanics in deep ground engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(11)：2 161﹣2 178.(in Chinese))
[14] 王 璞，王成虎，杨汝华，等. 基于应力多边形与震源机制解的深部岩体应力状态预测方法初探[J]. 岩土力学，2019，40(11)：1﹣12.(WANG Pu，WANG Chenghu，YANG Ruhua，et al. Preliminary investigation on the constraint method of deep rock stresses based on stress polygon and focal mechanism solution[J]. Rock and Soil Mechanics，2019，40(11)：1﹣12.(in Chinese))
[15] 陈群策，孙东生，崔建军，等. 雪峰山水压致裂地应力测量及其意义[J]. 地质力学学报，2019，25(5)：853–865.(CHEN Qunce，SUN Dongsheng，CUI Jianjun，et al. Hydraulic fracturing stress measurements in Xuefengshan deep borehole and its significance[J]. Journal of Geomechanics，2019，25(5)：853–865.(in Chinese))
[16] ITO T，EVANS K，KAWAI K，et al. Hydraulic fracture reopening pressure and the estimation of maximum horizontal stress[J]. International Journal of Rock Mechanics and Mining Sciences，1999，36：811–826.
[17] RUTQVIST J，TSANG，C F，STEPHANSSON O. Uncertainty in the maximum principal stress estimated from hydraulic fracturing measurements due to the presence of the induced fracture[J]. International Journal of Rock Mechanics and Mining Sciences，2000，37：107–120.
[18] ITO T，IGARASHI A，KATO H，et al. Crucial effect of system compliance on the maximum stress estimation in the Hydrofracturing method：Theoretical considerations and field-test verification[J]. Earth Planets Space，2006，58：963–971.
[19] ITO T，SATOH T，KATO H. Deep rock stress measurement by hydraulic fracturing method taking account of system compliance effect[C]// ISRM International Symposium on In-situ Rock Stress. Beijing：Taylor and Francis Group，2010：43–49.
[20] 王成虎，宋成科，邢博瑞. 水压致裂应力测量系统柔性分析及其对深孔测量的影响[J]. 现代地质，2012，26(4)：808﹣816.(WANG Chenghu，SONG Chengke，XING Borui. Compliance of drilling-rod system for hydro-fracturing in situ stress measurements and its effcet on measurements at great depth[J]. Geoscience，2012，26(4)：808﹣816.(in Chinese))
[21] CHANG C D，JO Y G，OH Y K，et al. Hydraulic fracturing in situ stress estimations in a potential geothermal site，Seokmo island，South Korea[J]. Rock Mechanics and Rock Engineering，2014，47(5)：1 793–1 808.
[22] 王春权，王成虎，江英豪，等. 基于不同岩石抗拉强度值确定最大水平主应力的对比分析[J]. 地下空间与工程学报，2017，13(1)：41﹣47.(WANG Chunquan，WANG Chenhu，JIANG Yinghao，et al. Comparative analysis of determinating the maximum horizontal principal stress based on different tensile strength of rocks[J]. Chinese Journal of Underground Space and Engineering，2017，13(1)：41﹣47.(in Chinese))
[23] 贾 晋，王成虎，高桂云，等. 2种方法优选确定易县紫荆关最大水平主应力量值[J]. 岩石力学与工程学报，2018，37(增2)：4 142﹣4 150.(JIA Jin，WANG Chenghu，GAO Guiyun，et al. Utilizing two methods to determine the horizontal principal stresses of Zijingguan region，Yixian County，Heibei Province[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(Supp.2)：4 142﹣4 150.(in Chinese))
[24] 尤明庆，苏承东. 平台巴西圆盘劈裂和岩石抗拉强度的试验研究[J]. 岩石力学与工程学报，2004，23(18)：3 106﹣3 112.(YOU Mingqing，SU Chengdong. Experimental study on split test with flattened disk and tensile strength of rock[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(18)：3 106﹣3 112.(in Chinese))
[25] 喻 勇. 质疑岩石巴西圆盘拉伸强度试验[J]. 岩石力学与工程学报，2005，24(7)：1 150﹣1 157.(YU Yong. Questioning the validity of the Brazilian test for determing tensile strength of rocks[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(7)：1 150﹣ 1 157.(in Chinese))
[26] 刘运思，傅鹤林，饶军应，等. 不同层理方位影响下板岩各向异性巴西圆盘劈裂试验研究[J]. 岩石力学与工程学报，2012，31(4)：785﹣791.(LIU Yunsi，FU Heling，RAO Junying，et al. Research on Brazilian disc splitting tests for anisotropy of slate under influence different bedding origientations[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(4)：785﹣791.(in Chinese))
[27] ZHANG S H，WU S C，ZHANG G，et al. Three-dimensional evolution of damage in sandstone Brazilian discs by the concurrent use of active and passive ultrasonic techniques[J]. Acta Geotechnica，2018. https://doi.org/10.1007/s11440-018-0737-3
[28] QI S W，LAN H X，MARTIN D，et al. Factors controlling the difference in Brazilian and direct tensile strength of the Lac du Bonnet granite[J]. Rock Mechanics and Rock Engineering，2019. https://doi.org/10.1007/s00603-019-01946-x
[29] 高桂云，王成虎，王春权. 双圆环直接拉伸试验试验最有尺寸范围研究[J]. 岩土力学，2018，39(增1)：191﹣202.(GAO Guiyun，WANG Chenghu，WANG Chunquan. Optimal size range study of rock specimen for double concentric annular core direct tensile test[J]. Rock and Soil Mechanics，2018，39(Supp.1)：191﹣202.(in Chinese))
[30] 严 健，何 川，汪 波，等. 雅鲁藏布江缝合带深埋长大隧道群岩爆孕育及特征[J]. 岩石力学与工程学报，2019，38(4)：769–781.(YAN Jian，HE Chuan，WANG Bo，et al. Inoculation and characters of rock bursts in extra-long deep-lying tunnels located on Yarlung Zangbo suture[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(4)：769﹣781.(in Chinese))
[31] ZOBACK M D. Reservoir geomechanics[M]. Cambridge：Cambridge University Press，2007：206–233.
[32] LIU L，ZOBACK M D. The effect of topography on the state of stress in the crust：application to the site of the Cajon Pass Scientific Drilling Project[J]. Journal of Geophysical Research，1992，97：5 095–5 100.
[33] 陈群策，毛吉震，候砚和. 利用地应力实测数据讨论地形对地应力的影响[J]. 岩石力学与工程学报，2004，23(23)：3 990﹣3 995. (CHEN Qunce，MAO Jizhen，HOU Yanhe. Study on influence of topography on in-situ stress by interpretation of measurement data of in-situ stress[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(23)：3 990﹣3 995.(in Chinese))
[34] HAIMSON B C. The effect of lithology，inhomogeneity，topography，and faults，on in situ stress measurements by hydraulic fracturing，and the importance of correct data interpretation and independent evidence in support of results[C]// XIE Furen ed. Rock Stress and Earthquake. Beijing：Taylor and Francis Group，2010：11–14.
[35] 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)：2 200﹣2 208.(HU Shaohua，CHEN Yifeng，ZHOU Chuangbing. Laboratory test and mesomechanical analysis of permeability variation of Beishan granite[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(11)：2 200﹣2 208. (in Chinese))
[36] 周龙寿，丁立丰，郭啟良. 不同压裂介质影响下绝对应力测量的试验研究[J]. 岩土力学，2013，34(10)：2 869﹣2 927.(ZHOU Longshou，DING Lifeng，GUO Qiliang. Eeperimental study of absolute rock stress measurements under different fracture media[J]. Rock and Soil Mechanics，2013，34(10)：2 869﹣2 927. (in Chinese))
[37] GRONSETH J M，KRY P R. Instantaneous shut-in pressure and its relationship to the minimum in situ stress，Hydraulic fracturing stress measurements[M]. Washington D. C.：National Academy Press，1983：55–60.
[38] LEE M Y，HAIMSON B C. Statistical evaluation of hydraulic fracturing stress measurement parameter[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanical Abstracts，1989，26：447–456.
[39] HAYASHI K，HAIMSON B C. Characteristics of shut-in curves in hydraulic fracturing stress measurements and determination of in situ stress minimum compressive stress. Journal of Geophysical Research，1991，96：18 311–19 321.
[40] HAIMSON B C. The hydraulic fracturing method of stress measurement：theory and practice[C]// HUDSON J A. Comprehensive Rock Engineering[M]. Oxford：Pergamon Press，1993：395–412.
[41] 陈群策，毛吉震，张 钧. 水压致裂应力测量数据分析——对关闭压力Ps值判读方法的讨论[C]// 中国地震局地壳应力研究所，日本电力中央研究所. 水压致裂裂缝的形成和扩展研究. 北京：地震出版社，1999：191–194.(CHEN Qunce，MAO Jizhen，ZHANG Jun. Analysis of the hydraulic fracturing stress data-discussion on the interpretation of shut-in pressure[C]// Institute of Crustal Dynamics，Central Research Institute of Electric Power Industry，ed. Foramtion and propagation of hydraulic fracturing cracks. Beijing：Seismological Press，1999：181–194.(in Chinese))
[42] 丰成君，陈群策，吴满路，等. 水压致裂应力测量数据分析——对瞬时关闭压力Ps的常用判读方法讨论[J]. 岩土力学，2012，33(7)：2 149﹣2 159.(FENG Chengjun，CHCEN Qunce，WU Manlu，et al. Analysis of hydraulic fracturing stress measurement data-discussion of methods frequently used to determine instantaneous shut-in pressure[J]. Rock and Soil Mechanics，2012，33(7)：2 149–2 159.(in Chinese))
[43] BARTON C A，ZOBACK，M D，MOOS D. Fluid flow along potentially active faults in crystalline rock[J]. Geology，1995，23：683–686.
[44] ZOBACK M D，TOWNEND J. Implications of the hydrostatic pore pressures and high crustal strength for the deformation of intraplate lithosphere[J]. Tectonophysics，2001，336(1–4)：19–30.
[45] 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))
[46] 邓华锋，王 伟，李建林，等. 层状砂岩各向异性力学性质特征试验研究[J]. 岩石力学与工程学报，2018，37(1)：112–120.(DENG Huafeng，WANG Wei，LI Jianlin，et al. Experimental study on anisotropic characteristics of bedded sandstone[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(1)：112﹣120.(in Chinese))
[47] 衡 帅，杨春和，郭印同，等. 层理对页岩水力裂缝扩展的影响研究[J]. 岩石力学与工程学报，2015，34(2)：228–237.(HENG Shuai，YANG Chunhe，GUO Yintong，et al. Influence of bedding planes on hydraulic fracture propagation in shale formations[J]. Chinese Journal of Rock Mechanics and Engineering，2015，33(2)：228﹣237.(in Chinese))
[48] 潘 睿，张广清. 层状岩石断裂能各向异性对水力裂缝扩展路径影响研究[J]. 岩石力学与工程学报，2018，37(10)：2 309–2 318.(PAN Rui，ZHANG Guangqing. The influence of fracturing energy anisotropy on hydraulic fracturing path in layered rocks[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(10)：2 309–2 318.(in Chinese)) |
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2020, Vol. 39 
