SECARB OFFSHORE: UNDERSTANDING THE POTENTIAL FOR SUBSEA CO2 STORAGE IN THE EASTERN GULF OF MEXICO
While onshore resources in the southeastern U.S. have been well-quantified, offshore resources are less understood and have different technical challenges. Building on the preliminary work conducted in previous studies, SECARB Offshore is undertaking a comprehensive resource characterization in the eastern GOM with more detailed evaluation of storage opportunities in federal and state waters (exclusive of Texas state waters), in active and depleted oil and gas fields (including those potentially associated with CO2-EOR) as well as deep saline aquifers. When available, existing data are being utilized, with gaps being identified and addressed when possible.
Quantifying the potential resources is only the first step in understanding the potential for subsea CO2 storage in the eastern GOM. Monitoring techniques will require modifications to address the unique challenges presented by offshore subsea CO2 storage. For example, onshore monitoring often utilizes dedicated monitoring wells; this could be prohibitively expensive in an offshore setting. Thus, alternative monitoring methodologies are being evaluated as part of SECARB Offshore.