Wipper, I think you are brushing aside some key points and confusing some others.
To begin with, GDY will initially target Olympic Dam as it's first 500MW customer. This will require 500km of transmission lines, costing in at about $350m ($700 000 per km is the upper price limit). There is a huge disparity between this figure and your $1000m. Regardless of the amount of government funding, this costing is certainly viable when considering the resource grade and economic life (+100years per well and capable of a constant rotating harvest pattern, allowing the resource to be extracted indefinitely)
The most important variable to geothermal energy production if temperature - there is no getting around it, heat engines work much more efficiently at higher temperatures. For geothermal power, temperature has an exponential effect of thermal extraction rates, and every single degree counts, both for efficiency and economic life. The temperatures GDY are targeting will be approaching 300C. As an example of the impact that high temperature has, GDY will still provide considerably cheaper electricity to O.D than the on-site geothermal resources (though this is also a function of the Kalina Cycle).
Tasmania has an established and active geothermal industry, and nothing they have ever come across has even compared to the quality of the Cooper Basin GELs, which even come with their own in-situ water supply, and the world's largest EGS reservoir.
There are no thermal gradients demonstrated in any of the shallow drill holes on KUThs SELs that approach the thermal gradient demonstrated by HAB1 and HAB2. KUTh looks good, and has about a quarter of Tassie under those licenses, but there's no indication whatsoever that it will be bigger than GDY.
KEN Price at posting:
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