By: Nigel Bankes
Carbon capture and storage (CCS) is not yet a proven technology at commercial scales. It is true that we have had considerable experience with analogies including acid gas disposal projects, natural gas storage projects and enhanced oil recovery (EOR) projects (involving the injection of carbon dioxide as a miscible flood). We also have some international experience especially in the North Sea with CO2 injection projects not linked to EOR, but elsewhere, commercial scale CCS projects are just getting underway. And there is nothing that would stop or seriously slow the adoption of CCS more quickly than a significant failure in one of the early projects.
For some this would be no bad thing – particularly for the climate skeptics, those who believe that human induced global warming is not happening. Others accept the reality of global warming but are philosophically opposed to CCS as a means of mitigating emissions. The challenge for this group is to identify realistic alternatives if we remove CCS as an option. Yes, energy conservation and the widespread and aggressive adoption of renewables will get us a long way, and for some nuclear energy is an important part of the solution, but national mitigation strategies often adopt a “wedge” that represents the contribution that CCS can make to meeting national mitigation targets (see for example, the work of the National Round Table on the Economy and the Environment). If we lose the CCS wedge we need to find other mitigation strategies that can deliver over the next ten to twenty years.
This is what is so troubling about the reports (see below) that are emerging from Saskatchewan in which the Kerr family alleges that they are experiencing harms from carbon dioxide leaking from the enhanced oil recovery operation of Encana (now Cenovus) in the Weyburn Field in Saskatchewan. This project (which is an EOR project and not a CCS project) has been extensively and intensively studied since 2000 by an international group of scientists and has been adopted by the International Energy Agency as a pilot project to encourage learning for future CCS projects (see here).
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