(677g) Characterization of CO2, Fluid, and Shale Via Feature Relocation Using Field-Emission Scanning Electron Microscopy, in Situ Infrared Spectroscopy, and Pore Size Analysis

Goodman, A., National Energy Technology Laboratory
Kutchko, B., National Energy Technology Laboratory
Culp, J., LRST
Natesakhawat, S., National Energy Technology Lab
Crandall, D., NETL
Fundamental research examining the geochemical interactions of CO2 and fluids with shale is limited from the perspective of understanding shale as a potential CO2 storage reservoir and as an effective natural seal for hydrocarbons or CO2. In addition, little is known about the effects of hydraulic fracturing agents such as water and CO2 on the shale reservoir. Reaction of CO2 with in-situ fluids, fracturing fluids, and reactive shale interfaces may generate new reactive surfaces or intermediates that may alter the properties of the formation. A fundamental understanding of the reactivity of CO2 with shale and fluid interfaces will help in identifying 1) how CO2 storage in shale formations plays a role in Carbon Capture and Storage (CCS) activities, 2) if CO2 can be applied as a potential fracturing agent, and 3) whether CO2 is an effective fluid for hydrocarbon extraction. In this work, we apply in-situ Fourier Transform infrared spectroscopy (FT-IR), feature relocation scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) surface area and density functional theory (DFT) pore size analysis to examine the effects of CO2 and fluid on the shales across the U.S.