Experimental investigation of the hydraulic properties of large-scale irregular fractured rock masses in granite fault zones

Springer Science and Business Media LLC - Tập 30 - Trang 1259-1277 - 2022
Liang Guo1,2, Xiaoyu He1, Zhuhong Xiong3, Han Chen3, Jiao Zhu4, Mingwei Liao1, Hao Guo1, Xiaozhao Li5, Baoquan Wang1, Min Zhang1, Lei Xing1
1School of Geoscience and Technology, Southwest Petroleum University, Chengdu, China
2State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, China
3Sichuan Institute of Building Research Corporation, Chengdu, China
4State Grid Jiangsu Electric Power Engineering Consulting Co., LTD, Nanjing, China
5School of Earth Sciences and Engineering, Nanjing University, Nanjing, China

Tóm tắt

Permeability is one of the critical parameters for evaluating the hydraulic properties of water-conducting media. Variations in the hydraulic properties generally lead to uncertainties in the groundwater flow and solute transport in regional rock masses, influencing the migration and diffusion of high-level radioactive waste in hard-rock repositories. This study mainly focuses on the hydraulic properties of the Shiyuejing fault (about 25 km long), which is located in the Jiujing Block, i.e., one of the main candidate sites for a high-level radioactive waste repository in China. Fluid flow tests were conducted on large-scale irregular specimens (~0.008 m3) extracted from outcrops in the Shiyuejing fault zone via a nonstandard apparatus to determine the variations in the hydraulic properties. The dominant flow pathways were identified by slicing the specimens and extracting the geometric features of water-conducting fractures inside the specimens using a staining solution. The results show that three fracture sets exist in the fault zone, where the hydraulic conductivities exhibit a downward trend, from >10−4 to 10−5–10−4 cm/s to below 10−5 cm/s when sets I, II, and III are dominant, respectively. Three types of flow states, namely, laminar flow type, filling type, and erosion type, are indicated by the corresponding characteristics of the pressure-flow rate curves, and the permeabilities of these three flow types successively decrease.

Tài liệu tham khảo

Bear J, Tsang CF, De MG (1993) Flow and contaminant transport in fractured rock. Academic, San Diego Benke R, Painter S (2003) Modeling conservative tracer transport in fracture networks with a hybrid approach based on the Boltzmann transport equation. Water Resour Res 39(11):1324. https://doi.org/10.1029/2003WR001966 Berkowitz B (2002) Characterizing flow and transport in fractured geological media: a review. Adv Water Res 25(8):861–884. https://doi.org/10.1016/S0309-1708(02)00042-8 Bigi S, Battaglia M, Alemanni A, Lombardi S, Campana A, Borisova E, Loizzo M (2013) CO2 flow through a fractured rock volume: insights from field data, 3D fractures representation and fluid flow modeling. Int J Greenh Gas Con 18:183–199. https://doi.org/10.1016/j.ijggc.2013.07.011 Bodin J, Delay F, De MG (2003) Solute transport in a single fracture with negligible matrix permeability: 2. mathematical formalism. Hydrogeol J 11(4):434–454. https://doi.org/10.1007/s10040-003-0269-1 Bossart P, Hermanson J, Mazurek M (2001) Analysis of fracture networks based on the integration of structural and hydrogeological observations on different scales. SKB TR-01-21, SKB, Stockholm Bossart P, Meier PM, Moeri A (2002) Geological and hydraulic characterization of the excavation disturbed zone in the Opalinus Clay of the Mont Terri Rock Laboratory. Eng Geol 66(1–2):19–38. https://doi.org/10.1016/S0013-7952(01)00140-5 Carey JW, Lei Z, Rougier E, Mori H, Viswanathan H (2015) Fracture-permeability behavior of shale. J Unconven Oil Gas Res 11:27–43. https://doi.org/10.1016/j.juogr.2015.04.003 Carsten L, Martin S, Teutsch G (2004) Investigation of the effects of fractured porous media on hydraulic tests: an experimental study at laboratory scale using single well methods. J Hydrol 297:95–108. https://doi.org/10.1016/j.jhydrol.2004.04.004 Christopher M, Martin S, Liedl R (2003) New experimental techniques for pneumatic tomographical determination of the flow and transport parameters of highly fractured porous rock samples. J Hydrol 278:51–63. https://doi.org/10.1016/S0022-1694(03)00132-X Claudia C, Concetta IG, Nicola P (2012) Bench scale laboratory tests to analyze non-linear flow in fractured media. Hydrol Earth Syst Sci 16:2511–2522 Cvetkovic V, Frampton A (2012) Solute transport and retention in three-dimensional fracture networks. Water Resour Res 48(2):W02509. https://doi.org/10.1029/2011WR011086 Dverstorp B, Andersson J, Nordqvist W (1992) Discrete fracture network interpretation of field tracer migration in sparsely fractured rock. Water Resour Res 28(9):2327–2343. https://doi.org/10.1029/92WR01182 Fienen M, Hunt R, Krabbenhoft D, Clemo T (2009) Obtaining parsimonious hydraulic conductivity fields using head and transport observations: a Bayesian geostatistical parameter estimation approach. Water Resour Res 45(8):2263–2289. https://doi.org/10.1029/2008WR007431 Fookes PG (1997) Geology for engineers: the geological model, prediction and performance. Q J Eng Geol 30(4):293–424 Guo L, Li XZ, Zhou YY, Zhang YS (2015) Generation and verification of three-dimensional network of fractured rock masses stochastic discontinuities based on digitalization. Environ Earth Sci 73(11):7075–7088. https://doi.org/10.1007/s12665-015-4175-3 Guo L, Hu XW, Wu LZ, Li XZ, Ma HS (2018) Simulation of fluid flow in fractured rocks based on the discrete fracture network model optimized by measured information. Int J Geomech 18(10):05018008. https://doi.org/10.1061/(ASCE)GM.1943-5622.0001270 Guo L, Zhang JW, Xiao ZW, Wang BQ, Liao MW, Qian DL, Pei C, Ji YJ, Zhu J, Guo H, Liu ZZ (2020a) Irregular rock sample high-pressure device with adjustable flow direction and test method thereof. https://patentsgazette.uspto.gov/week26/OG/html/1487-5/US11047789-20210629.html. Accessed May 2022 Guo L, Wu LZ, Zhang JW, Liao MW, Ji YJ (2020b) Identification of homogeneous region boundaries of fractured rock masses in candidate sites for Chinese HLW repository. B Eng Geol Environ 79(8):4221–4243. https://doi.org/10.1007/s10064-020-01837-4 Houseworth JE, Asahina D, Birkholzer JT (2013) An analytical model for solute transport through a water-saturated single fracture and permeable rock matrix. Water Resour Res 49(49):6317–6338. https://doi.org/10.1002/wrcr.20497 Hyman JD, Painter SL, Viswanathan H, Makedonska N, Karra S (2015) Influence of injection mode on transport properties in kilometers-scale three-dimensional discrete fracture networks. Water Resour Res 51(9):7289–7308. https://doi.org/10.1002/2015WR017151 Ishibashi T, Watanabe N, Tamagawa T, Tsuchiya N (2019) Three-dimensional channeling flow within subsurface rock fracture networks suggested via fluid flow analysis in the Yufutsu fractured oil/gas reservoir. J Petrol Sci Eng 178:838–851. https://doi.org/10.1016/j.petrol.2019.04.003 Izbash SV (1931) O filtracii V Kropnozernstom Materiale [About filtration in coarse material]. USSR, Leningrad Jafari A, Babadagli T (2012) Estimation of equivalent fracture network permeability using fractal and statistical network properties. J Petrol Sci Eng 92–93(4):110–123. https://doi.org/10.1016/j.petrol.2012.06.007 Jung R (1989) Hydraulic in situ investigations of an artificial fracture in the Falkenberg granite. Int J Rock Mech Min Sci Geomech Abstr 26(3):301–308. https://doi.org/10.1016/0148-9062(89)91978-5 Khang ND, Watanabe K, Saegusa H (2004) Fracture step structure: geometrical characterization and effects on fluid flow and breakthrough curve. Eng Geo 75(1):107–127. https://doi.org/10.1016/j.enggeo.2004.05.004 Kumar H, Elsworth D, Liu JS, Pone D, Mathews JP (2015) Permeability evolution of propped artificial fractures in coal on injection of CO2. J Petrol Sci Eng 133:695–704. https://doi.org/10.1016/j.petrol.2015.07.008 Leahy K, Baldock J, Johnson K (2017) The role of geological structure and weathering in contaminant fate and transport in fractured bedrock at two sites in the UK. Q J Eng Geol Hydroge 50(3):287–300. https://doi.org/10.1144/qjegh2016-126 Lee MK, Bethke CM (1994) Groundwater flow, late cementation, and petroleum accumulation in the Permian Lyons sandstone, Denver basin. Am Assoc Petr Geol B 78(2):217–237. https://doi.org/10.1306/BDFF9064-1718-11D7-8645000102C1865D Li B, Jiang Y, Koyama T, Jing L, Tanabashi Y (2008) Experimental study of the hydro-mechanical behavior of rock joints using a parallel-plate model containing contact areas and artificial fractures. Int J Rock Mech Mining Sci 45(3):362–375. https://doi.org/10.1016/j.ijrmms.2007.06.004 Liu MM, Hu SH, Chen YF, Zhou CB (2016a) Analytical model of nonlinear seepage parameters of fractured rock mass based on high pressure water pressure test. J Hydraul Eng 47(6):752–762 (in Chinese) Liu RC, Li B, Jiang YJ (2016b) A fractal model based on a new governing equation of fluid flow in fractures for characterizing hydraulic properties of rock fracture networks. Comput Geotech 75:57–68. https://doi.org/10.1016/j.compgeo.2016.01.025 Liu RC, Wang CS, Li B, Jiang YJ, Jing HW (2020) Modeling linear and nonlinear fluid flow through sheared rough-walled joints taking into account boundary stiffness. Comput Geotech 120:103452. https://doi.org/10.1016/j.compgeo.2020.103452 Ma L, Xu YS, Shen SL, Sun WJ (2014) Evaluation of the hydraulic conductivity of aquifers with piles. Hydrogeol J 22(2):371–382. https://doi.org/10.1007/s10040-013-1068-y Mazurek M, Bossart P, Eliasson T (1996) Classification and characterization of water-conducting features at Äspö: results of investigations on the outcrop scale. Stockholm, SKB, ICR-97-01 Mecchia M, Sauro F, Piccini L, Columbu A, De WJ (2019) A hybrid model to evaluate subsurface chemical weathering and fracture karstification in quartz sandstone. J Hydrol 572:745–760. https://doi.org/10.1016/j.jhydrol.2019.02.026 Ministry of Water Resources of the People’s Republic of China (2003) Code of water pressure testing in boreholes for water resources and hydropower engineering (in Chinese). China Water and Power Press, Beijing Munier R (2004) Statistical analysis of fracture data adapted for modeling discrete fracture networks. SKB Rapport R-04-66:20–23, SKB, Stockholm Neuzil CE, Tracy JV (1981) Flow through fractures. Water Resour Res 17(1):191–199. https://doi.org/10.1029/WR017i001p00191 Ni SH, He SH, Wang XG, Lu K, Bian K (2013) High pressure permeability properties of fractured rock masses. Int J Rock Mech Mining Sci 32(2):3028–3035 Nicholson K (1994) Environmental protection and the development of geothermal energy resources. Environ Geochem Health 16(2):86–87. https://doi.org/10.1007/BF00209836 Nick HM, Paluszny A, Blunt MJ, Matthai SK (2011) Role of geomechanically grown fractures on dispersive transport in heterogeneous geological formations. Phys Rev E 84(5):056301. https://doi.org/10.1103/PhysRevE.84.056301 Paluszny A, Thomas RN, Saceanu MC, Zimmerman RW (2020) Hydro-mechanical interaction effects and channeling in three-dimensional fracture networks undergoing growth and nucleation. J Rock Mech Geotech Eng 12(4):707–719. https://doi.org/10.1016/j.jrmge.2020.04.004 Peng P (2019) Elementary analysis on the distribution law of rock mass permeability of bank slope in a valley area, Shaanxi. Water Resour 3:127–131. https://doi.org/10.16747/j.cnki.cn61-1109/tv.2019.03.046 Pruess K, Bodvarsson GS, Stefansson V, Eliasson ET (1984) The Krafla geothermal field, Iceland: 4. history match and prediction of individual well performance. Water Resour Res 20(11):1561–1584. https://doi.org/10.1029/WR020i011p01561 Pruess K, Wang JSY, Tsang YW (1990) On thermohydrologic conditions near high-level nuclear wastes emplaced in partially saturated fractured tuff: 2. effective continuum approximation. Water Resour Res 26(6):1249–1126. https://doi.org/10.1029/WR026i006p01249 Pusch R (1989) Alteration of the hydraulic conductivity of rock by tunnel excavation. Int J Rock Mech Min Sci Geomech Abstr 26(1):79–83. https://doi.org/10.1016/0148-9062(89)90528-7 Rhen I, Forsmark T (2000) High-permeability features. IPR-00-02, SKB, Stockholm Rotár-Szalkai Á, Csizmeg J, Veta I, Király C (2017) Oil accumulation, regional groundwater flow and inert gas risk in the southern Danube basin, Hungary. Interpretation 6(1):99–109. https://doi.org/10.1190/int-2017-0052.1 Salimzadeh S, Paluszny RA, Zimmerman R (2018) Effect of cold CO2 injection on fracture apertures and growth. Int J Greenh Gas Con 74:130–141. https://doi.org/10.1016/j.ijggc.2018.04.013 Sato T, Kikuchi T, Sugihara K (2000) In-situ experiments on excavation disturbed zone induced by mechanical excavation in Neogene sedimentary rock at Tono mine, central Japan. Eng Geol 56(1-2):97–108. https://doi.org/10.1016/S0013-7952(99)00136-2 Shahbazi A, Saeidi A, Chesnaux R (2020) A review of existing methods used to evaluate the hydraulic conductivity of a fractured rock mass. Eng Geol 265:105438. https://doi.org/10.1016/j.enggeo.2019.105438 Snow DT (1969) Anisotropie permeability of fractured media. Water Resour Res 5(6):1273–1289. https://doi.org/10.1029/WR005i006p01273 Souley M, Homand F, Pepa S, Hoxha D (2001) Damage-induced permeability changes in granite: a case example at the URL in Canada. Int J Rock Mech Min Sci 38(2):297–310. https://doi.org/10.1016/S1365-1609(01)00002-8 Tikoff B, Blenkinsop T, Kruckenberg SC, Morgan S, Newman J, Wojtal S (2013) A perspective on the emergence of modern structural geology: celebrating the feedbacks between historical-based and process-based approaches. Geol S Am S 500:65–119. https://doi.org/10.1130/2013.2500(03) Tsang CF, Neretnieks I (1998) Flow channeling in heterogeneous fractured rocks. Rev Geophy 36(2):275–298 Tsang CF, Neretnieks I, Tsang Y (2015) Hydrologic issues associated with nuclear waste repositories. Water Resour Res 51(9):6923–6972. https://doi.org/10.1002/2015WR017641 Vilarrasa V, Koyama T, Neretnieks I, Jing L (2011) Shear-induced flow channels in a single rock fracture and their effect on solute transport. Transp Porous Med 87(2):503–523. https://doi.org/10.1007/s11242-010-9698-1 Wang J (2014) On area-specific underground research laboratory for geological disposal of high-level radioactive waste in China. J Rock Mech Geotech Eng 6(2):99–104. https://doi.org/10.1016/j.jrmge.2014.01.002 Watanabe N, Ishibashi T, Tsuchiya N (2015) Predicting the channeling flows through fractures at various scales. In: Proceedings of the 2015 World Geothermal Congress, Melbourne, April 2015 Witherspoon PA, Wang JSY, Iwail K, Gale JE (1979) Validity of cubic law for fluid flow in a deformable rock fracture. Water Resour Res 16(6):1016–1024. https://doi.org/10.1029/WR016i006p01016 Wu ZJ, Lu H, Weng L, Liu QS, Shen JQ (2020) Investigations on the seepage characteristics of fractured sandstone based on NMR real-time imaging. Chin J Rock Mech Eng 40(2):263–274. https://doi.org/10.13722/j.cnki.jrme.2020.0716 Yu ZB, Huang Y, Schwartz FW (2008) Principle of groundwater hydrology (in Chinese). Science Press, Beijing Zhang SJ, Dong XZ, Wu BH, Wang CL (2018) Experimental investigation of nonlinear flow for single rock fractures. Earth Env Sci 167(1):012003. https://doi.org/10.1088/1755-1315/167/1/012003 Zhou CB, Sharma RS, Chen YF, Rong G (2008) Flow-stress coupled permeability tensor for fractured rock masses. Int J Numer Anal Methods Geomech 32(11):1289–1309. https://doi.org/10.1002/nag.668 Zoorabadi M, Indraratna B, Nemcik J (2012) A new equation for the equivalent hydraulic conductivity of rock mass around a tunnel. Int J Rock Mech Min Sci 54:125–128. https://doi.org/10.1016/j.ijrmms.2012.05.017