Decarbonisation Technology February 2026 Issue

In low-porosity limestone formations, for example, seismic imaging can struggle to provide clear resolution due to signal scattering. Tracer sampling filled that gap, mapping fluid migration where seismic interpretation was uncertain. The outcome reinforced the complementary nature of tracers within integrated monitoring systems: each technique strengthens the other, producing a fuller picture of subsurface behaviour. Addressing public and environmental concerns Carbon storage will only scale if public confidence keeps pace with technical progress. Communities living near storage sites want assurance that the process is safe and that any potential issues would be detected early. Tracer monitoring contributes directly to that assurance by providing an objective mechanism to confirm containment and identify any deviations immediately. In the unlikely event that CO₂ migrates beyond the intended reservoir, the principal risk is to groundwater quality rather than human safety. Monitoring wells around storage sites are routinely tested, and the inclusion of tracers means even minute concentrations can be identified and traced back to their source. If detected, injection can be paused and mitigation steps taken long before the public faces any impact. This transparency builds confidence not only among regulators but also among local stakeholders. As CCS projects become more visible, the ability to communicate concrete data becomes an essential part of maintaining the industry’s social licence to operate. Looking ahead The evolution of tracer technology continues alongside the wider growth of CCS. Tracerco is staying ahead of demand, and new tracer chemistries are being developed to withstand more extreme subsurface conditions, ensuring accuracy across a broader range of reservoirs. Advances in digitalisation are enabling real- time reporting, integrating tracer data with other MMV streams into unified dashboards for operators and regulators alike.

The same principles are being applied to adjacent low-carbon sectors. In hydrogen storage and geothermal energy, Tracerco’s tracers are helping researchers and operators understand subsurface flow paths and integrity under new operating conditions. As these industries scale, lessons learned from CO₂ storage will accelerate their own assurance systems. Growing demand is also shaping how tracer technology is produced and deployed. With a global manufacturing and supply network, the sector is preparing for the wave of commercial-scale CCS projects expected “ The permanence of stored carbon will define the credibility of CCS as a climate solution. Proving that permanence depends on data – data that is measurable, verifiable, and transparent ” over the next decade. Within Tracerco, new specialists and scientists are being trained to meet the analytical and operational requirements of continuous monitoring on a global scale. Conclusion The permanence of stored carbon will define the credibility of CCS as a climate solution. Proving that permanence depends on data – data that is measurable, verifiable, and transparent. Chemical tracers deliver exactly that: a direct line of evidence connecting the act of injection with the assurance of containment. As CCS projects transition from demonstration to deployment, tracer technology is becoming an integral part of the trust. It is not a replacement for seismic or geochemical monitoring, but the bridge between them, translating interpretation into confirmation. In doing so, it strengthens the foundation of public, regulatory, and investor confidence that large-scale decarbonisation requires.

Heinz Weidmann tracerco@tracerco.com