Dry Structures for CO2 Storage Site: A Quick-Look Assessment of Characteristics and Potential Utilization in SEA

Dry structures refer to geological formations that were drilled but encountered oil and gas shows, or where existing wells seem to have encountered water instead. CO2 storage in dry structures has fewer issues with well integrity and offers more space, but it lacks proven geological and geophysical containment elements. This means additional information is also needed, like saline aquifer storage. This paper demonstrates the target area evaluation by integrating risk identification into the integral process for assessing CO2 storage prospects, specifically focusing dry structures in SEA. The primary objective of this study is to identify potential CO2 sources from both developed and undeveloped fields, and to pinpoint potential future storage candidates based on certain practices. Additionally, this paper aims to develop rapid screening criteria for assessing the suitability of dry structures as potential saline aquifer storage sites. Other than that, this research includes a comparative study between approved CCS projects and the identified dry structure storage sites. Utilizing the outlined methodology, numerous structures across diverse basins in the area have been pinpointed as potential candidates for future CO2 storage. Geological features like faults, stratigraphy, and hydrogeology serve as ideal considerations for characterizing site selection.