Offshore carbon capture and storage (CCS) projects assess the offshore storage potential and address technology needs that are specific to the offshore environment. Offshore CCS offers additional carbon dioxide (CO2) storage opportunities and may prove to be easier than the onshore storage of CO2 in geologic formations. In addition, it may also offer a CCS alternative for regions with limited onshore potential.
Research is needed to characterize offshore storage potential; validate modeling, simulation, and monitoring tools for offshore geologic storage; inform international and domestic regulatory development; and address technical gaps and technology needs (e.g., monitoring, modeling, and simulation) specific to the offshore environment.
Assessment of potential offshore carbon storage complex provides information needed for the selection of sites for future field laboratories. Current research projects are working with industry, the Bureau of Ocean Energy Management (BOEM), and state geologic surveys to collect additional data on key potential storage complexes offshore of the U.S. east coast and the Gulf of Mexico. The projects are utilizing existing geologic and geophysical data (e.g., well logs, records and sample descriptions from existing or plugged/abandoned wells, available seismic surveys, existing core samples) to conduct a Prospective Storage Resource assessment of the reservoirs. In addition, these projects involve 3D flow and geomechanical modeling, as well as the identification of sites with the potential to store at least 30 million metric tons (MMT) of CO2.
Differences in the offshore and onshore environments lead to differences in characterization and monitoring, verification, accounting (MVA) and assessment technologies, which need to be further evaluated for offshore applications. In addition, offshore infrastructure, technology, and CO2 storage reservoir properties can vary considerably; thus, MVA efforts should be designed to meet site-specific needs.
More information on Offshore Projects can be found on the Carbon Storage Project Portfolio Page under “Characterization Field Projects (Onshore and Offshore).”