One cubic kilometre of hot granite at 240^oC has the stored energy equivalent of 40 million barrels of oil when the heat is extracted to a temperature of 140^oC.

Australia is known to have several thousand cubic kilometres of identified high heat producing granites and these have the potential to meet the total electricity demand of the country for hundreds of years.

Power generation from Hot Fractured Rocks.

In Geodynamics tenements in the Cooper Basin a thermal resource equivalent to 50 billion barrels of oil is estimated. This consists of a 1 kilometre thick slab of granite covering 1000 square kilometres equivalent to the surface area of GEL 97 and GEL 98, all above 5km depth, and with an average temperature of 270^oC. For comparison, Australia's current total oil reserves are 2.9 billion barrels, and the US oil reserves are 20 billion barrels.

However, several challenges have to be overcome to realise this potential. First of all, the development of an underground heat exchanger poses several local challenges. It has to be established whether horizontal underground heat exchangers will develop as predicted by the known tectonic stress conditions. Once a horizontal heat exchanger has been developed successfully, the flow rate through the underground heat exchanger also has to meet certain criteria. The energy required to pump the water through the underground heat exchangers also needs to be low enough for the project to be sustainable.

On the positive side, underground heat exchangers have been successfully engineered overseas wherever development has been tried, particularly in France, Japan, Sweden, and USA. As a consequence Geodynamics was confident it could develop thes heat exchangers at its Cooper Basis site. In late 2003 this proved to be the case with a horizontal heat exchanger outlined by acoustic emissions produced during high pressure water injection. The heat exchanger was nuch larger than expected.

Through its international network, Geodynamics had access to the experience gained, and technical progress made overseas, and is now at the forefront of such developments in its own right.