| Title | MeProRisk-II -A joint research project for optimization strategies and risk analysis for deep geothermal reservoirs |
|---|---|
| Authors | Marquart, Clauser, MeProRisk R C |
| Year | 2013 |
| Conference | European Geothermal Conference |
| Keywords | interdisciplinary approach, stochastic reservoir simulation, seismic fracture detection, reservoir risk analysis, reservoir optimization. |
| Abstract | The MeProRisk II project is a joint venture of 5 universities and a geophysical consultancy for defining and developing methods and workflows or evaluating geothermal reservoirs. These workflows combine information on the structure and the lithology of a reservoir with stochastic numerical simulation, estimation of uncertainty, and analysis of the probability of a successful geothermal reservoir use. Based on seismic and complementary surface observations, a first structural model of the reservoir is developed. Various filter methods applied to the seismic data allow identifying fractures and fissure networks. Petrophysical information is obtained from logging and lab studies on rock samples and attributed to the reservoir structural units in a stochastic framework. Numerical simulations of the reservoir accounting for the uncertainty of the petrophysical and structural parameters and an analysis of the Jacobian of the dynamic system are used to determine the uncertainty range for temperature and well pressure. With respect to the flow rates required for geothermal installations, this information is used for optimizing their lay-outs and estimating the associated risk of failure. This workflow is complemented by studies of micro-seismicity and stereographic 3D image analysis. The successful application of this approach is demonstrated for both sedimentary and crystalline reservoirs. |