In-situ pore pressure determination by the evaluation of fractures induced during straddle-packer operations in the badurach geothermal reservoir

During stress measurements by hydraulic fracturing, fractures are opened and induced in the near borehole stress field as a result of the inflation of a straddle-packer Such very small events are surprisingly enough information along with televiewer measurements of the packer position to determine the in situ pore pressure. It is described the theory that goes along with the new procedure, the developed evaluation scheme leading to results for the geothermal reservoir in Bad Urach as well as the equipment designed for this unique field test.