Decarbonisation Technology - November 2024 Issue

I-1

I-2

P-1

P-2

P-3

Figure 2 Proof of connection

Figure 3 Proof of significance

Benefits of tracer technology in offshore and onshore CO₂ capture projects Tracer technology has been applied successfully with other MMV technologies to enhance the viability and safety of CO₂ storage projects. Seismic imaging alone is necessary to visualise the plume, but tracers complement seismic and other technologies by offering additional insights and validation. When used with seismic imaging, tracers enhance the monitoring and verification process and are detectable at extremely low concentrations. Chemical tracers provide clear and unambiguous evidence of CO₂ origins, pinpointing CO₂ leaks swiftly. They eliminate the need for extensive geochemical surveys or conventional monitoring technologies, resulting in significant cost savings and improved

○ Adaptive infrastructure design: The flexibility demonstrated in In Salah’s system design and operation provides a valuable lesson for other CCS projects. Ensuring that systems can adapt to changing conditions and new information will support more resilient and successful storage operations. landmark achievement in CCS. Its successful implementation and the extensive knowledge gained offer a rich source of insights for other CCS projects worldwide. By adopting the lessons learned from In Salah – ranging from thorough geological characterisation to flexible system design – future projects can enhance their effectiveness and reliability. Conclusions The In Salah CO₂ Storage Project is a

CCS/CCUS field type Depleted reservoir

Saline aquifer

Pressure

CO 2 tracer @ Tracer type

RTD-sweep volume-curve typing Information from tracer

Onshore

Offshore Onshore Offshore

management

P P P P P P P P P P P P P

P P P P P P P P P

injections

Connectivity Boundary assurance Surface monitoring Nearby additional storage CO 2 injection Low-cost insurance Natural CO 2 vs injected Future monitoring wells SWCTT - oil saturation PITT - oil saturation

SWCTT

PITT

Production tracer

Inflow tracer in producing wells Calibration with other technologies

P P

All

Table 1 Information obtained through tracer technology