Can we use geothermal instead of hydro to decarbonise BC? (The Climate Examiner)
This week, the PICS flagship 2060 Project: Integrated Energy Pathways for British Columbia and Canada issued a briefing note seeking to answer that question.
The key challenge is uncertainty. We have a good idea of where hot aquifers might be located, but we aren’t sure. The 11 potential sites are described as ‘P50’, terminology that means that there is a 50/50 chance that the installed capacity will be less (or greater) than projected. So geothermal developers have to drill exploration wells, at a cost of $1 million a pop on average, and then confirmation wells, which cost $4-6 million. This means that as much as half of the cost of development is incurred before anyone knows what the true value of the resource at a particular site will be.
This sort of uncertainty makes investors nervous. Those regions that have extensively developed geothermal such as Iceland overcome this obstacle by reimbursing a proportion of drilling costs or boosting electricity sales revenue via tax credits.
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