Geologic Sequestration Site Characterization (GSSC) -
Recovery Act: Gulf of Mexico Miocene CO2 Site Characterization Mega Transect
Performer: University of Texas at Austin
Project No: FE0001941
The University of Texas at Austin and their partners at Los Alamos National Laboratory (LANL), Environmental Defense Fund, and Sandia Technologies, LLC are investigating Texas offshore subsurface storage resources in the Gulf of Mexico as candidate geologic storage formations (Figure 1). This project will identify one or more CO2 injection site(s) within an area of Texas offshore state lands (extending approximately 10 miles from the shoreline) that are suitable for the safe and permanent storage of CO2 from future large-scale commercial CCS operations (Figure 2). The approach for identifying these injection sites is to use both historic and new data to evaluate the candidate geologic formations. Additional work will be conducted to evaluate the effects of chemical reactions resulting from injection of CO2 into the identified formations and their effects on potential commercial-level injection. A risk analysis and mitigation plan will also be generated in support of near-term commercial development efforts.
The project team will refine CO2 storage resource estimates for Miocene-age geologic storage formations and specific candidate reservoirs, and coordinate data sharing with the National Carbon Sequestration Database and Geographical Information System (NATCARB). In addition, the team will assess the effectiveness of confining zone(s) for retaining CO2 over a period of centuries, by evaluating brine chemical reactions and conducting reservoir simulations, and plume modeling.