> One concern in the Project Red test was that 10%-20% of the fluid pumped did not return to the surface. That number is much better than many legacy enhanced geothermal projects but needs improvement. Costs increase and site locations narrow to those with excess cheap water. It could also increase induced seismicity risk over time.

> The latest results released for Cape Station do not include the fluid loss number, so we don't know if it improved. Options remain even if it didn't, like reducing fluid throughput. That would hurt productivity, but further gains from drilling and completion intensification could compensate.

https://austinvernon.site/blog/geothermalupdate2024.html