The main purpose of the IDDP project is to find out if it is economically feasible to extract energy and geochemicals out of hydrothermal systems at supercritical conditions. To study the supercritical hydrous fluid, an advanced drilling technology needs to be applied and a novel fluid handling and evaluation system designed. The improvement of this basic idea by the IDDP is to drill deep enough into the roots of a conventional high temperature hydrothermal system to produce water at supercritical conditions and bring it to the surface as 400-600 degrees C superheated steam, at subcritical pressures (less than 220 bar). In the case of low permeability systems, by injecting cold fluid into the hot rocks, fractures can be induced to complete the thermal mining cycle.
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