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Simulation of CO2 injection in deep saline aquifers with mathematical verification and physical validation
Research group: Frederico Furtado (PI), Felipe Pereira and Mohammad Piri (Co-PIs), Arunasalam Rahunanthan (Research Scientist) and one graduate student.
Funding: Center for Fundamentals of Subsurface Flow and School of Energy Resources
Project Cost: $248,624 (2010-2013)
Abstract: This proposal outlines a three-year collaboration between applied mathematicians and a geoscientist at UW. This team will combine complementary expertise and technical accomplishments in experimental analysis, mathematical analysis, numerical analysis, and multiphase ﬂow modeling. The focus is a combined experimental, mathematical and computational investigation of multiphase ﬂows of fundamental importance for CO2 sequestration in deep saline aquifers. Our collaboration involves several tasks:
- Core-ﬂooding experiments of two-phase CO2 /brine systems in rock samples from the Rock Springs Uplift. These experiments, performed at reservoir conditions, will measure drainage, imbibition, and scanning of relative permeability characteristics. Such measurements will provide crucial data about relative permeability hysteresis and residual trapping of CO2 .
- Development of two-phase models that accurately account for important physical effects, such as relative permeability hysteresis, nonwetting phase trapping, and mass exchange between phases. This development will be informed by the data acquired in the laboratory experiments.
- Mathematical analysis of the solutions and nonlinear wave structure of the models that will originate from the one-dimensional laboratory experiments. This analysis will allow simulation veriﬁcation (demonstration that the numerical solution of the equations is mathematically correct). The experiments will allow validation (demonstration that the simulation equations correctly model the problem to be solved).
- Development of high-performance modules, with veriﬁcation and validation, for our existing multiphase ﬂow code-the UW-team simulator-to incorporate the hysteretic two-phase ﬂow models and a ﬂash calculation that accounts for co-contaminants injected with CO2. Each task of this project is a component of a much larger proposal that a multidisciplinary team of UW researchers is currently developing to model and simulate complex ﬂow behaviors associated to subsurface injection and storage of CO2 , which will be submitted to DOE-NETL by 30 April 2010 in response to the funding opportunity DE-FE0000250. If funded by SER, the present project will be a source of matching funds for the DOE-NETL proposal.
M. Akbarabadi, F. Furtado, F. Pereira, M. Piri, A. Rahunanthan, "Stationary Discontinuities in Hysteretic CO2/Brine Two-phase Flow," Tenth Annual Carbon Capture and Sequestration Conference