Filters: Tags: Multiphase Flow (X)
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My research aims to improve fundamental understanding of gas evolution and multiphase fluid flow within water-saturated, deformable porous media. These processes are governed by concurrent fluid-fluid and fluid-rock interactions such as chemical mass transfer, capillarity, buoyancy, viscous drag, and effective stress. Potential applications for the fundamental knowledge that I aim to generate include geologic radioactive waste storage, carbon sequestration, and hydraulic fracturing.
Categories: Project;
Tags: Carbon Sequestration,
Groundwater Flow and Transport,
Groundwater Hydraulics,
Hydromechanics,
Multiphase Flow
Numerical modeling was performed to analyze the impacts of potential multiphase conditions on long-term subsurface pressure evolution in subsurface systems. An example site on the Bruce Peninsula in Southern Ontario, Canada was selected due to the large amount of available, high-quality data showing significantly underpressured water and the possible presence of gas phase methane. The system was represented by a 1-D model in which multiphase flow and hydromechanical coupling during the last glacial loading and unloading cycle were simulated. Single-phase flow simulations were performed with the USGS single-phase flow simulator SUTRA, and then both single- and multiphase simulations were performed with the multiphase...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Canada,
Energy Resources,
Great Lakes,
Groundwater,
Groundwater Model,
To better understand the possible risks posed to shallow groundwater resources by geologic carbon sequestration (GCS), a multi-scale numerical modeling approach was invoked using the TOUGHREACT code from Lawrence Berkeley National Laboratory. The code solves coupled equations representing conservation of mass and energy on a finite difference grid to simulate multiphase, multicomponent, non-isothermal heat and mass transport in porous media. Two different two-dimensional cross-section modeling domains were constructed to improve understanding of groundwater flow and contaminant transport processes at a field site in soutwestern Utah. The site represents a natural analogue for leakage from a GCS site because water...
Hydraulic testing has revealed dramatic underpressures in Paleozoic shales and carbonates at the Bruce nuclear site in Ontario. Although evidence from both laboratory and field studies suggests that a small amount of gas phase methane could be present in the shale, previous studies examining causal linkages between gas phase and the underpressure have been inconclusive. To better elucidate processes in such a system, we used a highly simplified 1-D representation of the site to test, using iTOUGH2-EOS7C, the effects of various factors on the evolution of gas phase methane and pressures within the system. Heterogeneity was represented using three stratigraphic regions with distinctly different capillary pressure...
Using iTOUGH2-EOS7C, a simple 1-D model was developed to represent a site in Ontario, Canada which is being considered for nuclear waste disposal. The site exhibits substantially underpressured water and potential evidence for gas phase methane within a thick section of sedimentary rocks. To investigate possible mechanisms for the development of the underpressure in a multiphase system, hydromechanical coupling during a glacial cycle was simulated with and without gas phase methane present. Results indicate that, while the gas dampened the effects of the loading cycle, it did not preclude underpressure development. This USGS data release contains all of the input and output files for the simulations described in...
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