Diverse applications of DAS and their added values: A case study from Minami-aga pilot CCUS project, onshore Japan

Carbon capture and storage (CCS) is a critical strategy for reducing global CO 2 emissions. The success of CCS relies heavily on accurate measuring, monitoring, and validation of injected and stored CO 2 . The integration of distributed acoustic sensing (DAS) technology offers variable insights into measurement, monitoring, and verification (MMV) programs in CCS projects. DAS utilizes fiber-optic cables as sensors, enabling real-time monitoring of subsurface conditions with unparalleled precision and coverage. By revolutionizing traditional approaches, DAS provides cost-effective solutions and a comprehensive understanding of subsurface properties in both static and dynamic perspectives. This enhancement leads to improved operational efficiency and environmental safety in CCS projects. This paper describes the comprehensive applications of DAS in the Minami-aga pilot carbon capture, utilization, and storage project, onshore Japan. Key applications include subsurface installation techniques, vertical seismic profiling, crosswell seismic acquisition, microseismic monitoring, and injection profiling. This project showcases their transformative potential in advancing CCS practices. Ultimately, the integration of DAS technology contributes to optimizing MMV programs in CCS, supporting informed decision-making and enhancing operational efficiency in the pursuit of sustainable climate mitigation strategies.