One other thing to consider when analysing the risk presented by...

One other thing to consider when analysing the risk presented by O.D (and, in fact, any HFR project) is the potential for fluid loss.

If GRK can access the 200C granites at 5000m - 5500m, they will require flow of roughly 42000 L / minute to generate 50MWe (420 000 L / minute for the proposed 500MW system).

Hot Dry Rocks Pty Ltd, a geothermal consultancy, produced these figures by calculating the required thermal energy to produce a given electrical output in an ORC. It is estimated that a system with 1% loss of fluid per cycle would require an additional 420 L / minute of water to maintain reservoir pressure (600 000 L / day). For the hypothetical project with this loss, this would be a serious problem to overcome, and would introduce fuel costs into the economic equilibrium.

I'm not speculating that O.D will necessarily experience fluid loss, or that loss would be as high or low as 1%. It is, however, an unknown to consider, and investors aren't exactly having love-ins with unknowns right now.

Risk reduction is the way to go, and this company will need to tap the markets for money very soon. It would be good to see a shallow, sediment-hosted reservoir being acquired within the WA applications.

cheers
tawnyport