Physical simulation and quantitative characterization of fault zones based on ring-shear experiments
Abstract
Fault zones play a key role in controlling subsurface fluid migration, influencing hydro-carbon accumulation, CO₂ sequestration, and geo-energy storage safety. Most previous experimental studies, however, have been restricted to static outcrop or core observations, which fail to capture the progressive evolution of fault zone structures in time as a response to changing stresses. Moreover, existing analogue experiments often use unconsolidated sediments, which cannot accurately represent brittle faulting in consolidated rocks, and quantitative analyses remain limited. To address these challenges, a new method based on ring-shear experiments was developed to physically simulate fault zone formation in consolidated sandstones. The method simulates shear deformation under variable stress and displacement conditions, followed by multi-scale quantitative analyses, including computed tomography imaging, thin section analysis, and porosity-permeability testing under confining pressure. This comprehensive testing routine allows to quantify changes in fault zone thickness, particle and pore size distributions, and grain orientations during progressive deformation and depending on shear parameters. The results demonstrate systematic relationships between effective normal stress, shear displacement, and fault zone structural attributes. The fault zone thickness shows a nonlinear trend with stress, while cataclasis and compaction intensify with increasing displacement. This work provides a methodological foundation for future applications in fault seal analysis, fluid flow modeling, and numerical simulation, offering a practical reference for petroleum systems studies, hydrogeology, and underground gas storage including CO₂ and hydrogen
Document Type: Original article
Cited as: Jiang, M., Jin, Y., Fu, X., Liu, Q., Misch, D. Physical simulation and quantitative characterization of fault zones based on ring-shear experiments. Advances in Geo-Energy Research, 2025, 17(3): 256-266. https://doi.org/10.46690/ager.2025.09.07
Keywords:
Fault seal analysis, fault zones, shear experiments, faulting mechanismsReferences
Antonellini, M., Cilona, A., Tondi, E., et al. Fluid flow numer ical experiments of faulted porous carbonates, Northwest Sicily (Italy). Marine and Petroleum Geology, 2014, 55: 186-201.
Ballas, G., Fossen, H., Soliva, R. Factors controlling per meability of cataclastic deformation bands and faults in porous sandstone reservoirs. Journal of Structural Geology, 2015, 76: 1-21.
Balsamo, F., Storti, F. Grain size and permeability evolution of soft-sediment extensional sub-seismic and seismic fault zones in high-porosity sediments from the Crotone basin, southern Apennines, Italy. Marine and Petroleum Geology, 2010, 27(4): 822-837.
Barla, G., Barla, M., Martinotti, M. E. Development of a new direct shear testing apparatus. Rock Mechanics and Rock Engineering, 2010, 43(1): 117-122.
Bense, V. F., Van den Berg, E. H., Van Balen, R. T. Deforma tion mechanisms and hydraulic properties of fault zones in unconsolidated sediments; Roer Valley Rift System, The Netherlands. Hydrogeology Journal, 2003, 11(3): 319-332.
Bensing, J. P., Misch, D., Skerbisch, L., et al. Old core, new tricks: A comparative study of old and new mudstone cores for applications in the energy transition. Geoenergy, 2023, 1(1): geoenergy2023-013.
Cilona, A., Aydin, A., Johnson, N. M. Permeability of a fault zone crosscutting a sequence of sandstones and shales and its influence on hydraulic head distribution in the Chatsworth Formation, California, USA. Hydrogeology Journal, 2015, 23(2): 405-419.
Cuisiat, F., Skurtveit, E. An experimental investigation of the development and permeability of clay smears along faults in uncemented sediments. Journal of Structural Geology, 2010, 32(11): 1850-1863.
Deng, S., Zuo, L., Aydin, A., et al. Permeability characteri zation of natural compaction bands using core flooding experiments and three-dimensional image-based analysis: Comparing and contrasting the results from two different methods. AAPG Bulletin, 2015, 99(1): 27-49.
de Souza, D. H. S., Nogueira, F. C. C., Vasconcelos, D. L., et al. Growth of cataclastic bands into a fault zone: A mul tiscalar process by microcrack coalescence in sandstones of Rio do Peixe Basin, NE Brazil. Journal of Structural Geology, 2021, 146: 104315.
Du, X., Jin, Z., Zeng, L., et al. Characteristics and controlling factors of natural fractures in deep lacustrine shale oil reservoirs of the Permian Fengcheng Formation in the Mahu Sag, Junggar Basin, China. Journal of Structural Geology, 2023, 175: 104923.
Elkhoury, J. E., Niemeijer, A., Brodsky, E. E., et al. Labora tory observations of permeability enhancement by fluid pressure oscillation of in situ fractured rock. Journal of Geophysical Research, 2011, 116(B2): B02311.
Fossen, H., Cavalcante, G. C. G. Shear zones– A review. Earth-Science Reviews, 2017, 171: 434-455.
Fossen, H., Schultz, R. A., Shipton, Z. K., et al. Deformation bands in sandstone: A review. Journal of the Geological Society, 2007, 164(4): 755-769.
Fu, X., Jiang, M., Hu, Z., et al. Quantification of factors affect ing fault sealing by using machine learning: Shuangtaizi fault anticline, southern margin of the Liaohe Western Depression, Northeastern China. Marine and Petroleum Geology, 2024, 168: 106999.
Giger, S. B., Clennell, M. B., Harbers, C., et al. Design, operation and validation of a new fluid-sealed direct shear apparatus capable of monitoring fault-related fluid flow to large displacements. International Journal of Rock Mechanics and Mining Sciences, 2011, 48(7): 1160 1172.
Heilbronner, R. Automatic grain boundary detection and grain size analysis using polarization micrographs or orienta tion images. Journal of Structural Geology, 2000, 22(7): 969-981.
Jiang, M., Fu, X., Wang, Z. An experimental investigation of the characteristics of cataclastic bands in high-porosity sandstones. Geological Society of America Bulletin, 2024, 136(7-8): 3069-3084.
Jiang, M., Jin, Y., Fu, X., et al. The development of cataclastic bands in high-porosity sandstones: Insights from ring shear experiments. Journal of Structural Geology, 2023, 175: 104952.
Liu, G., Jin, Z., Zeng, L., et al. Laminar controls on bedding parallel fractures in Permian lacustrine shales, Junggar Basin, northwestern China. Geological Society of Amer ica Bulletin, 2025, 137(7-8): 3512-3526.
Pizzati, M., Balsamo, F., Storti, F. Displacement-dependent microstructural and petrophysical properties of defor mation bands and gouges in poorly lithified sandstone deformed at shallow burial depth (Crotone Basin, Italy). Journal of Structural Geology, 2020a, 137: 104069.
Pizzati, M., Balsamo, F., Storti, F., et al. Physical and chemical strain-hardening during faulting in poorly lithified sand stone: The role of kinematic stress field and selective cementation. Geological Society of America Bulletin, 2020b, 132(5-6): 1183-1200.
Reches, Z. E., Lockner, D. A. Fault weakening and earth quake instability by powder lubrication. Nature, 2010, 467(7314): 452-455.
Rotevatn, A., Fossen, H. Simulating the effect of subseismic fault tails and process zones in a siliciclastic reservoir analogue: Implications for aquifer support and trap def inition. Marine and Petroleum Geology, 2011, 28(9): 1648-1662.
Schmatz, J., Holland, M., Giese, S., et al. Clay smear pro cesses in mechanically layered sequences– results of water-saturated model experiments with free top surface. Journal of the Geological Society of India, 2010a, 75: 74-88.
Schmatz, J., Vrolijk, P. J., Urai, J. L. Clay smear in normal fault zones– the effect of multilayers and clay cemen tation in water-saturated model experiments. Journal of Structural Geology, 2010b, 32(11): 1834-1849.
Shi, X., Misch, D., Vranjes-Wessely, S. A comprehensive assessment of image processing variability in pore struc tural investigations: Conventional thresholding vs. ma chine learning approaches. Gas Science and Engineering, 2023, 115: 205022.
Smilgies, D.-M. Scherrer grain-size analysis adapted to grazing-incidence scattering with area detectors. Journal of Applied Crystallography, 2009, 42(6): 1030-1034.
Song, X., Fu, X., Li, H., et al. Improved method for quanti tative fault sealing evaluation in sand-clay sequences: A case study from the west subsag of Bozhong Sag in the Bohai Bay basin, China. Marine and Petroleum Geology, 2024, 169: 107062.
Takahashi, M. Permeability change during experimental fault smearing. Journal of Geophysical Research: Solid Earth, 2003, 108(B5): 2235.
Wang, G., Mitchell, T., Meredith, P., et al. Influence of gouge thickness and grain size on permeability of macrofrac tured basalt. Journal of Geophysical Research: Solid Earth, 2016, 121(12): 8472-8487.
Wang, Y., Gan, J., Liang, G., et al. Composite fault-sand body buried hill migration systems and accumulation models of natural gas: A case study of the deep-water area in Qiongdongnan Basin. Fault-Block Oil and Gas Field, 2022, 29(3): 319-324. (in Chinese)
Wibberley, C. A. J., Yielding, G., Di Toro, G. Recent advances in the understanding of fault zone internal structure: A review, in The Internal Structure of Fault Zones: Implica tions for Mechanical and Fluid-Flow Properties, edited by Wibberley, C. A. J., Kurz, W., Imber, J., Holdsworth, R. E. and Collettini, C., Geological Society, London, Special Publications, London, pp. 5-33, 2008.
Zhang, S., Tullis, T. E., Scruggs, V. J. Permeability anisotropy and pressure dependency of permeability in experimen tally sheared gouge materials. Journal of Structural Ge ology, 1999, 21(7): 795-806.
Zhang, Z., Yang, W., Wang, Q., et al. Hydrocarbon transport and migration characteristics of different structural units of strike-slip fault system and their differential control on hydrocarbon accumulation patterns: A case study of bitu minous vein area in Wuerhe, Junggar Basin. Fault-Block Oil & Gas Field, 2023, 30(3): 424-433. (in Chinese)
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