| Title | Evaluation of Hydraulic Tests at Soultz-Sous-forets, European HDR-Site |
|---|---|
| Authors | Reinhard Jung, Jonathan Willis Richard, Jonathan Nicholls, Alberto Bertozzi and Babara Heinemann |
| Year | 1995 |
| Conference | World Geothermal Congress |
| Keywords | hot-dry-rock, hydraulic fracturing, hydraulic testing |
| Abstract | Two massive hydraulic fracturing tests were performed in the 3600 m deep borehole GPKl in low permeable granite at rock temperatures up to 160 A large ( NW-SE trending vertical fracture system was created by injecting 45,000 of water. The fracture system was found to be connected to a natural reservoir of hot brine (nearby fault or fracture zone). This hydraulic link can contribute considerably to the production flow in a titure HDR circulation loop but carries also the risk of high fluid losses ifthe loop is operated at elavated pressure. |