Influencing mechanisms of multi-scale pore-fracture responses of coals on their macro/micromechanical behaviors under ScCO2 injection
Abstract view|122|times PDF download|75|times
Abstract
To decipher the mechanical response mechanisms of coal seams with multi-scale pore-fracture structure to supercritical CO2 (ScCO2) injection, two coal samples from different mines of the Ordos Basin, North China, were first selected for conducting ScCO2-water-coal reaction experiments. Subsequently, the pore-fracture structure, macroscopic and microscopic mechanical behaviors of samples with different reaction times were analyzed, and the evolution patterns of pore-fracture parameters and relationships between the macroscopic and microscopic mechanical parameters were finally elucidated. The results showed that the ScCO2-water-coal reaction modifies the pore-fracture structure in coal. Originally filled fractures re-open, original micro-fractures expand, new fractures form, and pores evolve from small- to large-sized. After the ScCO2-water-coal reaction, the evolution of the compaction stage, the macroscopic mechanical parameters and the energy dissipation during loading corroborate the weakening effect of the ScCO2-water-coal reaction on coal. The changes observed in the microscopic mechanical parameters align with those in the macroscopic mechanical parameters; however, due to the strong heterogeneity of coal and the inability of microscopic parameters to reflect the component and pore-fracture distribution, certain characteristics of the change amplitude of macroscopic and microscopic mechanical parameters of coal are inconsistent. The ScCO2 extraction effect, the chemical dissolution, the different-sized pore-fracture evolution, the coupling effect of geostress, reservoir pressure, and swelling stress are the main factors to consider during the process of ScCO2 sequestration in deep coal seams at the micro-, meso- and macro-scales, as they are responsible for potential safety issues.
Document Type: Original article
Cited as: Niu, Q., Wang, X., Chang, J., Wang, W., Liu, X., Wang, Q. Influencing mechanisms of multi-scale pore-fracture responses of coals on their macro/micromechanical behaviors under ScCO2 injection. Advances in Geo-Energy Research, 2024, 14(1): 64-80. https://doi.org/10.46690/ager.2024.10.08
Keywords
Full Text:
PDFReferences
Alhammad, F., Ali, M., Yekeen, N. P., et al. The effect of methylene blue and organic acids on the wettability of sandstone formation: Implications for enhanced oil recovery. Capillarity, 2024, 10(2): 29-37.
Anderson, S. T. Risk, liability, and economic issues with longterm CO2 storage-a review. Natural Resources Research, 2017, 26(1): 89-112.
Anggara, F., Sasaki, K., Sugai, Y. Mineral Dissolution/precipitation during CO2 injection into coal reservoir: A laboratory study. Energy Procedia, 2013, 37: 6722-6729.
Bekeshov, D., Ashimov, S., Wang, Y., et al. Understanding gas-enhanced methane recovery in graphene nanoslits via molecular simulations. Capillarity, 2023, 6(1): 1-12.
Busch, A., Gensterblum, Y. CBM and CO2-ECBM related sorption processes in coal: A review. International Journal of Coal Geology, 2011, 87(2): 49-71.
Chang, R., Kim, S., Lee, S., et al. Calcium carbonate precipitation for CO2 storage and utilization: A review of the carbonate crystallization and polymorphism. Frontiers in Energy Research, 2017, 5: 17.
Chen, B., Li, S., Tang, D., et al. Evaluation of recoverable potential of deep coalbed methane in the Linxing Block, Eastern Margin of the Ordos Basin. Scientific Reports, 2024, 14(1): 9192.
Cheng, P., Zhang, C., Ma, Z., et al. Experimental study of micromechanical properties alterations of shale matrix treated by ScCO2-Water saturation using nanoindentation tests. Energy, 2022, 242: 122965.
Connell, L. D., Detournay, C. Coupled flow and geomechanical processes during enhanced coal seam methane recovery through CO2 sequestration. International Journal of Coal Geology, 2009, 77(1): 222-233.
Dong, L., Liu, X., Gong, B., et al. Geomechanical properties of hydrate-bearing strata and their applications. Advances in Geo-Energy Research, 2024, 11(3): 161-167.
Du, Q., Liu, X., Wang, E., et al. Effects of CO2-water interaction with coal on mineral content and pore characteristics. Journal of Rock Mechanics and Geotechnical Engineering, 2020, 12(2): 326-337.
Espinoza, D. N., Santamarina, J. C. CO2 breakthrough—Caprock sealing efficiency and integrity for carbon geological storage. International Journal of Greenhouse Gas Control, 2017, 66: 218-229.
Ferronato, M., Gambolati, G., Janna, C., et al. Geomechanical issues of anthropogenic CO2 sequestration in exploited gas fields. Energy Conversion and Management, 2010, 51(10): 1918-1928.
Fu, C., Du, Y., Song, W., et al. Application of automated mineralogy in petroleum geology and development and CO2 sequestration: A review. Marine and Petroleum Geology, 2023, 151: 106206.
Fujioka, M., Yamaguchi, S., Nako, M. CO2-ECBM field tests in the Ishikari Coal Basin of Japan. International Journal of Coal Geology, 2010, 82(3): 287-298.
Gholami, R., Raza, A., Iglauer, S. Leakage risk assessment of a CO2 storage site: A review. Earth-Science Reviews, 2021, 223: 103849.
Gor, G. Y., Huber, P., Bernstein, N. Adsorption-induced deformation of nanoporous materials-a review. Applied Physics Reviews, 2017, 4(1): 011303.
He, H., Liu, P., Nie, B., et al. Micromechanical property evolution and damage mechanism of coal subjected to ScCO2 treatment. Energy, 2024, 304: 132087.
Hosseinzadeh, S., Haghighi, M., Salmachi, A., et al. Carbon dioxide storage within coal reservoirs: A comprehensive review. Geoenergy Science and Engineering, 2024, 241: 213198.
Hu, M., Niu, Q., Yuan, W., et al. Evolution characteristics and mechanism of microstructure, hydraulic and mechanical behaviors of sandstone treated by acid-rock reaction: Application of in-situ leaching of uranium deposit. Journal of Hydrology, 2024, 643: 131948.
Ibrahim, A. F. Prediction of coal wettability using machine learning for the application of CO2 sequestration. International Journal of Greenhouse Gas Control, 2022, 118: 103670.
Jia, J. Experimental simulation on stress and strain effects as supercritical CO2 being injected into deep anthracite reservoirs. Xuzhou, China University of Mining and Technology, 2017. (in Chinese)
Jia, J., Cao, L., Sang, S., et al. An experimental study on the damage characteristics of mechanical properties of anthracite induced by supercritical CO2 injection. Environmental Earth Sciences, 2019, 79(1): 12.
Ji, Z., Chen, Z., Pan, J., et al. A novel method for estimating methane emissions from underground coal mines: The Yanma coal mine, China. Atmospheric Environment, 2017, 170: 96-107.
Li, K., Zhu, C., Wan, J., et al. Experimental investigation into coal wettability changes caused by reactions with scCO2- H2O. Gas Science and Engineering, 2024, 128: 205366.
Liu, A., Liu, S., Liu, Y., et al. Characterizing mechanical heterogeneity of coal at nano-to-micro scale using combined nanoindentation and FESEM-EDS. International Journal of Coal Geology, 2022, 261: 104081.
Liu, C. J., Wang, G. X., Sang, S. X., et al. Changes in pore structure of anthracite coal associated with CO2 sequestration process. Fuel, 2010, 89 (10): 2665-2672.
Liu, H., Rutqvist, J. A new coal-permeability model: Internal swelling stress and fracture-matrix interaction. Transport in Porous Media, 2010, 82(1): 157-171.
Liu, K., Ostadhassan, M., Xu, X., et al. Abnormal behavior during nanoindentation holding stage: Characterization and explanation. Journal of Petroleum Science and Engineering, 2019, 173: 733-747.
Liu, X., Jia, X., Liu, W., et al. Mechanical strength and porosity changes of bituminous coal induced by supercritical CO2 interactions: Influence of saturation pressure. Geoenergy Science and Engineering, 2023a, 225: 211691.
Liu, X., Sang, S., Zhou, X., et al. Modelling of geomechanical response for coal and ground induced by CO2-ECBM recovery. Gas Science and Engineering, 2023b, 113: 204953.
Ma, Z., Pathegama Gamage, R., Zhang, C. Application of nanoindentation technology in rocks: A review. Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2020, 6: 60.
Memon, S., Verrall, M., Lebedev, M., et al. Nanoscale analysis of shale matrix alteration after supercritical CO2 treatment: Implications for scCO2 fracturing in shales. Energy & Fuels, 2024, 38(3): 1873-1890.
Meng, Z., Zhang, J., Wang, R. In-situ stress, pore pressure and stress-dependent permeability in the Southern Qinshui Basin. International Journal of Rock Mechanics and Mining Sciences, 2011, 48(1): 122-131.
Niu, Q., Cao, L., Sang, S., et al. Experimental study on the softening effect and mechanism of anthracite with CO2 injection. International Journal of Rock Mechanics and Mining Sciences, 2021a, 138: 104614.
Niu, Q., Cao, L., Sang, S., et al. A small-scale experimental study of CO2 enhanced injectivity methods of the highrank coal. Petroleum Science, 2021b, 18(5): 1427-1440.
Niu, Q., Wang, Q., Wang, W., et al. Responses of multiscale microstructures, physical-mechanical and hydraulic characteristics of roof rocks caused by the supercritical CO2-water-rock reaction. Energy, 2022, 238: 121727.
Otu, S., Rinehart, A. J., Luhmann, A. J., et al. Effects of CO2 on creep deformation in sandstones at carbon sequestration reservoir conditions: an experimental study. International Journal of Greenhouse Gas Control, 2023, 129: 103970.
Pan, J., Jiao, F., Wang, K., et al. Molecular simulations of the effects of CO2 and N2 injection on CH4 adsorption, coal porosity and permeability. Advances in Geo-Energy Research, 2024, 12(3): 205-222.
Perera, M. S. A., Ranjith, P. G., Viete, D. R. Effects of gaseous and super-critical carbon dioxide saturation on the mechanical properties of bituminous coal from the Southern Sydney Basin. Applied Energy, 2013, 110: 73-81.
Salmachi, A., Zeinijahromi, A., Algarni, M. S., et al. Experimental study of the impact of CO2 injection on the pore structure of coal: A case study from the Bowen Basin, Australia. International Journal of Coal Geology, 2023, 275: 104314.
Sampath, K. H. S. M., Perera, M. S. A., Elsworth, D., et al. Experimental investigation on the mechanical behavior of victorian brown coal under brine saturation. Energy & Fuels, 2018, 32(5): 5799-5811.
Sampath, K. H. S. M., Perera, M. S. A., Elsworth, D., et al. Effect of coal maturity on CO2-based hydraulic fracturing process in coal seam gas reservoirs. Fuel, 2019a, 236: 179-189.
Sampath, K. H. S. M., Perera, M. S. A., Ranjith, P. G., Qualitative and quantitative evaluation of the alteration of micro-fracture characteristics of supercritical CO2-interacted coal. The Journal of Supercritical Fluids, 2019b, 147: 90-101.
Sang, S., Niu, Q., Cao, L., et al. Mechanical response characteristics and mechanism of coal-rock with CO2 injection in deep coal seam: A review. Earth Science, 2022, 47(5): 1849-1864. (in Chinese)
Song, H., Zhong, Z., Lin, B. Chemical dissolution of minerals in anthracite after supercritical carbon dioxide immersion: Considering mechanical damage and enhanced porosity. Energy, 2023a, 283: 129063.
Song, Y., Jun, S., Na, Y., et al. Geomechanical challenges during geological CO2 storage: A review. Chemical Engineering Journal, 2023b, 456: 140968.
Wang, H., Cheng, X., Tian, J., et al. Permeability enhancement of low rank coal through acidization using H2S solution: An experimental study in the Kuqa-Bay Coalfield, Xinjiang, China. Journal of Petroleum Science and Engineering, 2020a, 185: 106476.
Wang, H., Xiang, J., Deng, X., et al. Micromechanical properties of coals and the response to changes in nanocarbon structure. Fuel, 2024, 373: 132321.
Wang, W., Wang, H., Fan, Y., et al. Distribution characteristics and enrichment factor gallium in coal seam No. 4 in Majialiang-Fangziping area, Fugu mining area. Paper Presented at the 4th International Symposium on Resource Exploration and Environmental Science, Ordos, China, 25-26 April, 2020b.
Wei, Y., Li, Z., Chen, B., et al. A numerical simulation study on the evolutionary characteristics of the damage process of karst soil cavity under positive pressure effect. Geohazard Mechanics, 2023, 1(4): 288-296.
Wetzel, M., Otto, C., Chen, M., et al. Hydromechanical impacts of CO2 storage in coal seams of the Upper Silesian Coal Basin (Poland). Energies, 2023, 16(7): 3279.
Xue, Y., Ranjith, P. G., Dang, F., et al. Analysis of deformation, permeability and energy evolution characteristics of coal mass around borehole after excavation. Natural Resources Research, 2020, 29(5): 3159-3177.
Xu, J., Luo, S., Xiao, X., et al. Review of the experimental studies of the cracking behaviors of fractured rocks under compression. Geohazard Mechanics, 2024, 2(2): 59-82.
Zagoršcak, R., Thomas, H. R. Effects of subcritical and ˇ supercritical CO2 sorption on deformation and failure of high-rank coals. International Journal of Coal Geology, 2018, 199: 113-123.
Zhang, F., Jiao, Y., Wang, S., et al. Origin of dispersed organic matter within sandstones and its implication for uranium mineralization: A case study from Dongsheng uranium ore filed in China. Journal of Earth Science, 2022a, 33(2): 325-341.
Zhang, G., Ranjith, P. G., Fu, X., et al. Pore-fracture alteration of different rank coals: Implications for CO2 sequestration in coal. Fuel, 2021a, 289: 119801.
Zhang, G., Ranjith, P. G., Li, Z., et al. Long-term effects of CO2-water-coal interactions on structural and mechanical changes of bituminous coal. Journal of Petroleum Science and Engineering, 2021b, 207: 109093.
Zhang, G., Ranjith, P. G., Lyu, Q. Direct evidence of CO2 softening effects on coal using nanoindentation. Energy, 2022b, 254: 124221.
Zhou, X., Sang, S., Niu, Q., et al. Changes of multiscale surface morphology and pore structure of mudstone associated with supercritical CO2-water exposure at different times. Energy & Fuels, 2021, 35(5): 4212-4223.
DOI: https://doi.org/10.46690/ager.2024.10.08
Refbacks
- There are currently no refbacks.
Copyright (c) 2024 The Author(s)
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.