Surgical Mapping Based Seismic Reservoir Characterization for Optimizing CO2 Storage Site Performance

Summary Seismic interpretation is vital for subsurface resource exploration, including CO2 storage projects. Traditional workflows rely on bulk-shifted horizons, often misaligning with seismic reflectors, leading to suboptimal reservoir characterization. The surgical mapping workflow enhances accuracy by systematically reviewing data, conditioning it, and precisely mapping minor reservoirs before extracting seismic attributes. Tested on Field A offshore Peninsular Malaysia, it revealed significant discrepancies between bulk-shifted and surgically mapped horizons, especially near faults. RMS amplitude analysis showed clearer geological features, by correlating with well logs and depositional environments. This method provides improved precision in CO2 storage evaluation, injector well placement, plume migration modelling, and MMV planning. It ensures better-informed decision-making, optimized well placement, and enhanced project performance. Additionally, it can aid in assessing top seal formations for CO2 containment security. The surgical mapping workflow is a valuable tool for accurate subsurface characterization, contributing to safer and more effective CCS project execution.