2. Multi stage stimulation: THMms_base
The probability of achieving an economically viable EGS project in a randomly fissured crystalline rock is less than 10% without the help of an efficient method for sectioning and successfully stimulating individual sections. Technologies will be demonstrated for general geothermal application, which can efficiently reduce the risk of the low-end outcomes. These technologies exist in other industries, namely oil and gas, but must be adapted to and tested for geothermal operating conditions.
The advantage of a multistage system, compared to a single stage system, becomes obvious if one compares the vertical single stage open hole system with the multi stage system: even in the case of a 50% failure rate of the stages of the multi stage system, the electric power outcome is multiplied by a factor of 2.9, while the costs only increase by a factor 1.6. In case of complete success for all stages (0% failure), the corresponding electric power is 6.2 times higher than a successful single stage completion.