Improved Duncan-Chang model for reconstituted hydrate-bearing clayey silt from the South China Sea
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Abstract
The experimental testing and analysis of strength and deformation characteristics of hydrate reservoirs is an integral part of natural gas hydrate exploitation. However, studies so far have failed to deeply explore samples from the South China Sea. Especially, there is a lack of a simple and applicable method to estimate their mechanical behaviors. Thus, based on test data, an improved Duncan-Chang model is established in this paper to characterize the strength and deformation of reconstituted samples with various hydrate saturation and stress states from this area. This model can accurately describe the strain-hardening characteristics, and failure strength is estimated by the improved Drucker-Prager criterion with high fitting accuracy. The initial elastic modulus and failure ratio are given by the proposed empirical models, which are obtained from experimental data and fitting methods. Generally, this model has several advantages including simple structure, favorable performances, and a limited number of model parameters. Therefore, it could be widely used in strength and deformation analysis. This study can support the prevention and control of geological risks during natural gas hydrate exploitation in the South China Sea.
Document Type: Short communication
Cited as: Dong, L., Wu, N., Zhang, Y., Liao, H., Hu, G. Li, Y. Improved Duncan-Chang model for reconstituted hydrate-bearing clayey silt from the South China Sea. Advances in Geo-Energy Research, 2023, 8(2): 136-140. https://doi.org/10.46690/ager.2023.05.07
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Chong, Z. R., Yang, S. H. B., Babu, P., et al. Review of natural gas hydrates as an energy resource: Prospects and challenges. Applied Energy, 2016, 162: 1633-1652.
Dong, L., Li, Y., Liao, H., et al. Strength estimation for hydrate-bearing sediments based on triaxial shearing tests. Journal of Petroleum Science and Engineering, 2020, 184, 106478.
Dong, L., Liao, H., Li, Y., et al. Analysis of the mechanical properties of the reconstituted hydrate-bearing clayey-silt samples from the South China Sea. Journal of Marine Science and Engineering, 2022, 10(6): 831.
Duncan, J. M., Chang, C. Y. Nonlinear analysis of stress and strain in soils. Journal of the Soil Mechanics and Foundations Division, 1970, 96(5): 1629-1653.
Hyodo, M., Wu, Y., Nakashima, K., et al. Influence of fines content on the mechanical behavior of methane hydrate-bearing sediments. Journal of Geophysical Research: Solid Earth, 2017, 122(10): 7511-7524.
Li, Y., Liu, C., Liu, L., et al. Experimental study on evolution behaviors of triaxial-shearing parameters for hydrate-bearing intermediate fine sediment. Advances in Geo-Energy Research, 2018, 2(1): 43-52.
Li, Y., Liu, L., Jin, Y., et al. Characterization and development of natural gas hydrate in marine clayey-silt reservoirs: A review and discussion. Advances in Geo-Energy Research, 2021, 5(1): 75-86.
Liao, H., Wang, E., Dong, L., et al. Test on abrasive jet cutting features of simulated hydrate reservoir. Journal of Central South University (Science and Technology), 2022, 53(3): 924-932. (in Chinese)
Lijith, K. P., Malagar, B. R., Singh, D. N. A comprehensive review on the geomechanical properties of gas hydrate bearing sediments. Marine and Petroleum Geology, 2019, 104: 270-285.
Miyazaki, K., Tenma, N., Aoki, K., et al. A nonlinear elastic model for triaxial compressive properties of artificial methane-hydrate-bearing sediment samples. Energies, 2012, 5(10): 4057-4075.
Ruppel, C. D., Waite, W. F. Timescales and processes of methane hydrate formation and breakdown, with application to geologic systems. Journal of Geophysical Research: Solid Earth, 2020, 125: e2018JB016459.
Pinkert, S., Grozic, J. L. H., Priest, J. A. Strain-softening model for hydrate-bearing sands. International Journal of Geomechanics, 2015, 15(6): 04015007.
Sánchez, M., Gai, X., Santamarina, J. C. A constitutive mechanical model for gas hydrate bearing sediments incorporating inelastic mechanisms. Computers and Geotechnics, 2017, 84: 28-46.
Uchida, S., Soga, K., Yamamoto, K. Critical state soil constitutive model for methane hydrate soil. Journal of Geophysical Research: Solid Earth, 2012, 117: B03209.
Wang, Z., Zhang, Y., Peng, Z., et al. Recent advances in methods of gas recovery from hydrate-bearing sediments: A Review. Energy & Fuels, 2022, 36: 5550-5593.
Yan, C., Cheng, Y., Li, M., et al. Mechanical experiments and constitutive model of natural gas hydrate reservoirs. International Journal of Hydrogen Energy, 2017, 42(31): 19810-19818.
Yoneda, J., Masui, A., Konno, Y., et al. Pressure-corebased reservoir characterization for geomechanics: Insights from gas hydrate drilling during 2012-2013 at the eastern Nankai Trough. Marine and Petroleum Geology, 2017, 86: 1-16.
DOI: https://doi.org/10.46690/ager.2023.05.07
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