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This study investigates the role of structural deformation patterns in the regional basin scale using 2D and 3D seismic reflection data for better understanding of the tectonostratigraphic framework in Sarawak Basin. In terms of charging and migration, the fault zone can act as a conduit for both hydrocarbon fluid and CO2. Understanding the role of the structural fabrics as the preliminary assessment for screening of geological CO2 storage site is needed for future operations. This study suggests that there is a strong spatial correlation between high-intensity and high-connectivity faulting with high CO2 concentration. Furthermore, the dilation tendency of the perpendicularly oriented fault trend to the present-day Shmax is lower compared to the relatively parallel oriented fault trend to the Shmax which might be suitable for a CO2 storage site. A detailed understanding through geomechanical and fault seal analysis will be necessary for further de-risk the CO2 storage site.