EGU21-12893, updated on 09 Jan 2024
EGU General Assembly 2021
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

CO2 fracturing using the phase field approach for the brittle fracture

Mostafa Mollaali1, Vahid Ziaei-Rad2, and Yongxing Shen2
Mostafa Mollaali et al.
  • 1Department of Environmental Informatics, Helmholtz Centre for Environmental Research (UFZ), Leipzig, Germany.
  • 2University of Michigan - Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai, China.

To simulate CO2 fracturing under an isothermal condition, we propose a phase field model. We take advantage of the ability of the phase field approach to predict fracture initiation and branching, as well as to avoid tracking the fracture path. We model the CO2 as a compressible fluid by modifying Darcy's law. In particular, we assume that the permeability is correlated to the value of the phase field by the exponential function. The dependence of the CO2 density as a function of the pressure is captured by the Span-Wagner state equation. The computed pressure breakdown values show good agreement with analytical solutions and experimental results.

How to cite: Mollaali, M., Ziaei-Rad, V., and Shen, Y.: CO2 fracturing using the phase field approach for the brittle fracture, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-12893,, 2021.

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