Version 1
: Received: 3 December 2022 / Approved: 6 December 2022 / Online: 6 December 2022 (03:16:31 CET)
How to cite:
Bhagat, K.; Jin, Z.; Rudraraju, S. A Novel Phase-Field Based Formulation of Interface Evolution during Mechanical Compaction of Sedimentary Basins. Preprints2022, 2022120093. https://doi.org/10.20944/preprints202212.0093.v1
Bhagat, K.; Jin, Z.; Rudraraju, S. A Novel Phase-Field Based Formulation of Interface Evolution during Mechanical Compaction of Sedimentary Basins. Preprints 2022, 2022120093. https://doi.org/10.20944/preprints202212.0093.v1
Bhagat, K.; Jin, Z.; Rudraraju, S. A Novel Phase-Field Based Formulation of Interface Evolution during Mechanical Compaction of Sedimentary Basins. Preprints2022, 2022120093. https://doi.org/10.20944/preprints202212.0093.v1
APA Style
Bhagat, K., Jin, Z., & Rudraraju, S. (2022). A Novel Phase-Field Based Formulation of Interface Evolution during Mechanical Compaction of Sedimentary Basins. Preprints. https://doi.org/10.20944/preprints202212.0093.v1
Chicago/Turabian Style
Bhagat, K., Zirou Jin and Shiva Rudraraju. 2022 "A Novel Phase-Field Based Formulation of Interface Evolution during Mechanical Compaction of Sedimentary Basins" Preprints. https://doi.org/10.20944/preprints202212.0093.v1
Abstract
A novel phase-field method based numerical approach to modeling the compaction process of sedi- ments is presented. Water-logged rock or soil sediments are deposited on the water basins over time and the increasing volume of the sediment compacts under its own weight and external pressure. Coupled evolution of mass conservation, Darcy flow, and the viscoelastic constitutive response, in conjunction with the evolution of porosity and permeability, make this problem highly non-linear and involve moving boundaries. We adopt a phase-field approach to represent the moving sediment interface, and the underlying multiphasic model permits for studying compaction in dynamically evolving sediments. This approach does not necessitate a change of domain sizes as is the case of existing traditional models of sedimentation but rather treats sedimentation growth as a problem of interface motion. We first model a classical compaction problem in 1D to compare with existing results in the literature, and then extend the framework to 2D to model the compaction process taking place under the influence of gravity. The model is then extensively applied to understand the effect of the sediment initial state and the sediment material properties on the compaction process and its spatiotemporal evolution. Lastly, a strong validation of our phase-field treatment results against predictions from traditional methods of solving open boundary sediment compaction problems, and a good agreement between the conventional understanding and the numerical predictions of porosity dependence on the fluid pore pressure for various cases of geological interest, are used to demonstrate the applicability and scalability of this novel numerical framework to model more advanced sediment compaction problems and geometries.
Keywords
finite element method, poroelasticity, moving interface, order parameter
Subject
Environmental and Earth Sciences, Geophysics and Geology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
