Tracking CO2 and seismicity during offshore carbon capture and storage operations with fiber-optic sensors

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:Demonstrates DAS's dual capability for seismic and CO2 migration monitoring in CCS, opening new research avenues for real-time reservoir surveillance.

🏢実務担当者:Provides evidence that DAS can reduce monitoring costs and improve safety for offshore CCS operators.

🏛政策担当者:Supports regulatory frameworks requiring robust monitoring for CCS projects, showing DAS as a viable technology for compliance.

<title>Abstract</title> <p> Carbon Capture and Storage (CCS) operations require reliable monitoring strategies to ensure the safety of the injection and long-term storage of CO2. Distributed acoustic sensing (DAS) technology has demonstrated significant advantages for seismic monitoring of sparsely-instrumented submarine environments, yet an assessment of its capabilities for offshore CCS operations is lacking. In this study, we analyze one year of continuous recordings from an operational CCS project in the northern Adriatic Sea, Italy, where a DAS-instrumented fiber-optic cable, installed in the injection well, complements a network of submarine conventional seismometers. We show how DAS outperforms the standard network in event detection and signal-to-noise ratio of recorded events. Beyond seismic monitoring, we demonstrate the capability to track CO ₂ migration within the wellbore using spatio-temporal variations of DAS seismic noise, revealing injection dynamics unresolved by conventional sensors. Results highlight the unique advantages of DAS technology in providing simultaneous operational and seismic monitoring capabilities. </p>

• Research Square https://doi.org/10.21203/rs.3.rs-9868215/v1first seen 2026-06-16 04:29:31