CCS and Power Systems
Carbon Storage - Geologic Storage Technologies and Simulation and Risk Assessment
Maximization of Permanent Trapping of CO2 and Co-Contaminants in the Highest-Porosity Formations of
Performer: University of Wyoming
Project No: FE0004832
The following accomplishments are contributing toward the project goal of understanding the process of storing mixed scCO2 in the RSU:
Built and validated a new state-of-the-art interfacial tension (IFT) and contact angle apparatus. Testing using this apparatus helps to determine how much CO2 is captured in a formation’s capillary system. Began using apparatus to perform analyses to study wettability under supercritical CO2 conditions. Results suggest that a significant fraction of initial CO2 in place can be stored through residual trapping.
Developed a hysteresis model and compositional simulator and used data from IFT and contact angle studies to refine the model.
Developed a phase equilibrium calculation module for scCO2, SO2, and brine and it is currently being used to perform analyses. Core flood laboratory experiments were conducted on Madison Limestone core samples to determine the effect of SO2 as a co-contaminant on capillary trapping under geologic formation conditions. Additionally, equilibrium densities of humidified carbon dioxide and CO2-saturated water phases have been measured and results were in good agreement with the literature.
Developed the fully parallel dynamic pore network model. Model is undergoing modification and expansion in order to make the simulation results closer to physical phenomena observed during the core flood experiments.
Completed the coupling of two-phase incompressible displacements with geomechanics in a model.
Continued development of the simulator that incorporates the hysteresis, pore network, phase equilibrium, and geomechanics modules.