裂缝后期充填花岗岩体裂缝分布特征研究

doi:10.13722/j.cnki.jrme.2022.1162

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Abstract As a kind of green and renewable resources，the scale and efficient development of hot dry rock(HDR) geothermal energy has always been a worldwide research hotspot. In order to solve the problems of small heat exchange volume and poor heat exchange effect in the development of intact HDR geothermal by Enhanced Geothermal System(EGS)，the fracture distribution characteristics of natural deep HDR body were studied. Through field observation，it was found that structural fractures in deep granite bodies were universally filled by hydrothermal fluid or magma，forming fractured-subsequently-filled granite. Through micro-observation test，it is concluded that under the influence of high temperature action of backfill，changes in the number of thermal-cracking fractures of fractured-subsequently-filled granite versus the distance from the cementation interface can be divided into a zone in which the number of fractures fluctuates gently，a zone showing a sharp increase in the number of fractures，and a zone in which the fluctuation in the number of fractures decreases. The fractured-subsequently-filled granite mainly produces micro-fractures with length＞50 μm and length＞100 μm，and the position of the maximum number of thermal-cracking fractures with different length scales is located in the parent rock at a certain distance away from the cementation interface. When the fracture backfill thickness is 3.4cm，the unilateral influence range of the high temperature action of the fracture backfill is about 1 m. The widespread fracture backfill result in the formation of a huge weak-plane structure in the granite parent rock. Through hydraulic fracturing test，it is concluded that the weak-plane structure can be used as fracture channels to construct artificial reservoir through hydraulic fracturing，and can greatly reduce the breakdown pressure，so as to achieve large-scale and efficient construction of HDR artificial reservoirs. On this basis，the research on new technology of artificial reservoir construction in HDR geothermal exploitation constitutes a new research direction for HDR geothermal development.

Key words： rock mechanics fractured-subsequently-filled granite micro-observation fracture distribution characteristics hydraulic fracturing hot dry rock geothermal mining

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	YIN Weitao

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YIN Weitao. Experimental research on the fracture distribution characteristics of fractured-subsequently-filled granite[J]. , 2023, 42(9): 2203-2211.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.1162 OR http://rockmech.whrsm.ac.cn/EN/Y2023/V42/I9/2203

[13]	ASAI P，PANJA P，MALENNAN J，et al. Effect of different flow schemes on heat recovery from Enhanced Geothermal Systems(EGS)[J]. Energy，2019，175：667-676.
[53]	JAEGER J C，COOK N G W. Fundamentals of rock mechanics[M]. London：Chapman and Hall，1979：21-124.
[22]	BALLOU L B. Geological disposal investigations in granite at the Nevada test site[R]. United States：Lawrence Livermore National Laboratory，1979.
[28]	LIU S，XU J Y. An experimental study on the physico-mechanical properties of two post-high-temperature rocks[J]. Engineering Geology，2015，185：63-70.
[1]	KANA J D，DIONGYANG N，RAIDANDI D，et al. A review of geophysical methods for geothermal exploration[J]. Renewable and Sustainable Energy Reviews，2015，44：87-95.
[41]	ARMSTEAD H C H，TESTER J W. Heat mining：a new source of energy[R]. London：Chapman and Hall，1987.
[51]	FENG Z J，ZHAO Y S，ZHOU A C，et al. Development program of hot dry rock geothermal resource in the Yangbajing Basin of China[J]. Renewable Energy，2012，39：490-500.
[4]	NASRUDDIN M，ALHAMID Y，DAUD A，et al. Potential of geothermal energy for electricity generation in Indonesia：a review[J]. Renewable and Sustainable Energy Reviews，2016，53：733-740.
[7]	中华人民共和国行业标准编写组. NB/T 10097—2018 地热能术语[S]. 北京：中国建筑工业出版社，2018.(The Professional Standards Compilation Group of the People's Republic of China. NB/T 10097—2018 Geothermal energy terminology[S]. Beijing：China Architecture and Building Press，2018.(in Chinese))
[11]	HOFMANN H，BABADAGLI T. Hot water generation for oil sands processing from enhanced geothermal systems：process simulation for different hydraulic fracturing scenarios[J]. Applied Energy，2014，113：524-547.
[14]	WANG G，SONG X，SHI Y，et al. Production performance of a novel open loop geothermal system in a horizontal well[J]. Energy Conversion and Management，2020，206：112478.
[17]	FENG Z J，ZHAO Y S，ZHANG Y，et al. Real-time permeability evolution of thermally cracked granite at triaxial stresses[J]. Applied Thermal Engineering，2018，133：194-200.
[19]	万志军，赵阳升，董付科，等. 高温及三轴应力下花岗岩体力学特性的实验研究[J]. 岩石力学与工程学报，2008，27(1)：72-77.(WAN Zhijun，ZHAO Yangsheng，DONG Fuke，et al. Experimental study on mechanical characteristics of granite under high temperatures and triaxial stresses[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(1)：72-77.(in Chinese))
[21]	GAUTAM P K，VERMA A K，JHA M K，et al. Effect of high temperature on physical and mechanical properties of Jalore granite[J]. Journal of Applied Geophysics，2018：460-474.
[24]	FRIEDMAN M，HANDIN J，HIGGS N G，et al. Strength and ductility of four dry igneous rocks at low pressures and temperatures to partial melting[C]// The 20th Symposium on Rock Mechanics. New York：ASCE，1979：35-50.
[27]	HEARD H C. Thermal expansion and inferred permeability of climax quartz monazite to 300 ℃ and 27.6 MPa[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1980，17：289-296.
[29]	GAUTAM P K，VERMA A K，SHARMA P，et al. Evolution of thermal damage threshold of Jalore granite[J]. Rock Mechanics and Rock Engineering，2018，51(9)：2 949-2 956.
[47]	张洪济. 热传导理论[M]. 北京：高等教育出版社，1992：12-32.(ZHANG Hongji. Heat conduction[M]. Beijing：Higher Education Press，1992：12-32.(in Chinese))
[2]	ABBAS T，BAZMI A，BHUTTO A，et al. Greener energy：issues and challenges for Pakistan-geothermal energy prospective[J]. Renewable and Sustainable Energy Reviews，2014，31(31)：258-269.
[5]	LEI Z，ZHANG Y，YU Z，et al. Exploratory research into the enhanced geothermal system power generation project：the Qiabuqia geothermal field，Northwest China[J]. Renewable Energy，2019，139：52-70.
[6]	CHENG W，LIU J，NIAN Y. Enhancing geothermal power generation from abandoned oil wells with thermal reservoirs[J]. Energy，2016，109：537-545.
[8]	ZHENG K Y，PAN X P. Current situation and prospect of geothermal power generation in China[J]. Sino-global Energy，2009，14(2)：45-48.
[10]	PARISIO F，VILARRASA V，WANG W，et al. The risks of long-term reinjection in supercritical geothermal systems[J]. Nature Communication，2019，10(1)：4 391.
[12]	SONG X，SHI Y，LI G，et al. Numerical simulation of heat extraction performance in enhanced geothermal system with multilateral wells[J]. Applied Energy，2018，218：325-337.
[15]	赵阳升，梁卫国，冯子军，等. 原位改性流体化采矿科学、技术与工程[J]. 煤炭学报，2021，46(1)：25-35.(ZHAO Yangsheng，LIANG Weiguo，FENG Zijun，et al. Science，technology and engineering of in situ modified mining by fluidization[J]. Journal of China Coal Society，2021，46(1)：25-35.(in Chinese))
[9]	OLASOLO P，JUAREZ M，MORALES M，et al. Enhanced geothermal systems(EGS)：a review[J]. Renewable and Sustainable Energy Reviews，2016，56：133-144.
[16]	GAUTAM P K，VERMA A K，SINGH T N，et al. Experimental investigations on the thermal properties of Jalore granitic rocks for nuclear waste repository[J]. Thermochimica Acta，2019，681：178-190.
[18]	YANG S Q，RANJITH P G，JING H W，et al. An experimental investigation on thermal damage and failure mechanical behavior of granite after exposure to different high temperature treatments[J]. Geothermics，2017，65：180-197.
[35]	GUO B，FU P，HAO Y，et al. Thermal drawdown-induced flow channeling in a single fracture in EGS[J]. Geothermics，2016，61：46-62.
[20]	郤保平，赵阳升. 高温高压下花岗岩中钻孔围岩的热物理及力学特性试验研究[J]. 岩石力学与工程学报，2010，29(6)：1 245-1 253.(XI Baoping，ZHAO Yangsheng. Experimental study of thermophysico-mechanical property of drilling surrounding rock in granite under high temperature and pressure[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(6)：1 245-1 253.(in Chinese))
[3]	MOYA D，ALDAS C，KAPARAJU P. Geothermal energy：power plant technology and direct heat applications[J]. Renewable and Sustainable Energy Reviews，2018，94：889-901.
[26]	TULLIS J，YUND R A. Experimental deformation of dry Westerly granite[J]. Journal of Geophysical Research，1977，82：5 705-5 718.
[23]	PAGE L，HEARD H C. Elastic moduli，thermal expansion，and inferred permeability of climax quartz monazite and Sudbury Gabbro to 500 ℃ and 55 MPa[R]. United States：Lawrence Livermore National Laboratory，1981.
[31]	BREEDE K，DZEBISASHVILI K，LIU X，et al. A systematic review of enhanced(or engineered) geothermal systems：past，present and future[J]. Geothermal Energy，2013，1(4)：6-10.
[34]	ZENG Y C，WU N Y，SU Z，et al. Numerical simulation of heat production potential from hot dry rock by water circulating through a novel single vertical fracture at Desert Peak geothermal field[J]. Energy，2013，63：268-282.
[37]	ZHANG Y J，MA Y Q，HU Z J，et al. An experimental investigation into the characteristics of hydraulic fracturing and fracture permeability after hydraulic fracturing in granite[J]. Renewable Energy，2019，140：615-624.
[39]	CORNET F H，BERARD T，BOUROUIS S. How close to failure is granite rock mass at 5 km depth[J]. International Journal of Rock Mechanics and Mining Sciences，2007，44(1)：47-66.
[44]	陈国能. 花岗岩成因：原地熔融与地壳演化[M]. 中国地质大学出版社，2009：81-104.(CHEN Guoneng. Genesis of granite：in situ melting and Crustal Evolution[M]. China University of Geosciences Press，2009：81-104.(in Chinese))
[49]	袁见齐，朱上庆，翟裕生. 矿床学[M]. 北京：地质出版社，1987：30-50.(YUAN Jianqi，ZHU Shangqing，ZHAI Yusheng. Geology of ore deposits[M]. Beijing：Geological Publishing House，1987：30-50.(in Chinese))
[54]	CHEN Y，NAGAYA Y，ISHIDA T. Observations of fractures induced by hydraulic fracturing in anisotropic granite[J]. Rock Mechanics and Rock Engineering，2015，48：1 455-1 461.
[25]	BAUER S J，FRIEDMAN M，HANDIN J. Effects of water saturation on strength and ductility of three igneous rocks at effective pressure to 50 MPa and temperatures to partial melting[C]// The 22nd Symposium on Rock Mechanics. Cambridge：ASCE，1981：79-84.
[45]	韩宝福，季建清. 地成天造，鬼斧神工——新疆准噶尔具观赏价值的花岗岩地貌景观[C]// 第一届国际花岗岩地质地貌研讨会交流文集. [S. l.]：[s. n.]，2006：115-117.(HAN Baofu，JI Jianqing. The Granite geomorphic landscape with ornamental value in Junggar，Xinjiang[C]// Proceedings of the First International Symposium on Granite Geology and Geomorphology. [S. l.]：[s. n.]，2006：115-117.(in Chinese))
[55]	FRASH L P，GUTIERREZ M，HAMPTON J et al. Laboratory simulation of binary and triple well EGS in large granite blocks using AE events for drilling guidance[J]. Geothermics，2015，55：1-15.
[30]	ZHAO Y S，FENG Z J，XI B P，et al. Deformation and instability failure of borehole at high temperature and high pressure in hot dry rock exploitation[J]. Renewable Energy，2014，77：159-165.
[32]	HOFMANN H，BABADAGLI T，YOON J S，et al. A hybrid discrete/finite element modeling study of complex hydraulic fracture development for enhanced geothermal systems(EGS) in granitic basements[J]. Geothermics，2016，64：362-381.
[33]	TRAN N H，RAHMAN S. Development of hot dry rocks by hydraulic stimulation：natural fracture network simulation[J]. Theoretical and Applied Fracture Mechanics，2007，47：77-85.
[36]	ZHAO Y S，FENG Z，FENG Z，et al. THM(Thermo-hydro-mechanical) coupled mathematical model of fractured media and numerical simulation of a 3D enhanced geothermal system at 573K and buried depth 6000-7000 m[J]. Energy，2015，82：193-205.
[38]	ZHOU Z，JIN Y，ZENG Y J，et al. Investigation on fracture creation in hot dry rock geothermal formations of China during hydraulic fracturing[J]. Renewable Energy，2020，153：301-313.
[40]	TESTER J W，HERZOG H J. Economic predictions for heat mining：a review and analysis of hot dry rock(HDR) geothermal energy technology[R]. Boston：Massachusetts Institute of Technology，1990.
[42]	国家旅游地理网. 世界第一个徒手登顶伊尔酋长岩的人[EB/OL].(2020-10-23)[2023-02-10]. http：//www.cntgol.com/?a1= 1p&1101880391.pdx.(National Travel Geographic Network. The first person in the world to reach the summit of El Capitan by hand[EB/OL].(2020-10-23)[2023-02-10]. http：//www.cntgol. com/?a1=1p&1101880391.pdx.(in Chinese))
[43]	赵阳升，万志军，康建荣. 高温岩体地热开发导论[M]. 北京：科学出版社，2004：21-54.(ZHAO Yangsheng，WAN Zhijun，KANG Jianrong. Introduction of Geothermal Extraction of Hot Dry Rock[M]. Beijing：Science Press，2004：21-54.(in Chinese))
[46]	唐雁冰，李闽. 二维裂缝网络的连通性与地层因素[C]// 2017暨庆祝中国力学学会成立60周年大会. [S. l.]：[s. n.]，2017：51-61.(TANG Yanbing，LI Min. Connectivity of two-dimensional fracture networks and stratigraphic Factors[C]// 2017 and Celebrating the 60th Anniversary of Chinese Mechanics Society. [S. l.]：[s. n.]，2017：51-61.(in Chinese))
[48]	杨坤光，袁晏明. 地质学基础[M]. 武汉：中国地质大学出版社，2009：20-40.(YANG Kunguang，YUAN Yanming. Foundation of geology[M]. Wuhan：China University of Geosciences Press，2009：20-40.(in Chinese))
[50]	ZHAO Y S，FENG Z J，ZHAO Y，et al. Experimental investigation on thermal cracking，permeability under HTHP and application for geothermal mining of HDR[J]. Energy，2017，132：305-314.
[52]	张洪伟，张通，万志军，等. 高温高压下岩石水力压裂实验新型封隔技术[J]. 东北大学学报：自然科学版，2021，42(3)：422-427.(ZHANG Hongwei，ZHANG Tong，WAN Zhijun，et al. New sealing techniques for hydraulic fracturing experiment of rock under high temperature and high pressure conditions[J]. Journal of Northeastern University：Natural Science，2021，42(3)：422-427.(in Chinese))