| Title | Self-Potential Monitoring with Reservoir Simulation in a Geothermal Field, Japan |
|---|---|
| Authors | Toshiyuki Tosha, Tsuneo Ishido, and Mituhiko Sugihara |
| Year | 2010 |
| Conference | World Geothermal Congress |
| Keywords | Geophysical Monitoring, Self-Potential, Reservoir Simulation, Gravity Survey, History Matching, Geothermal Field |
| Abstract | To assist in geothermal reservoir management, it is very useful to predict changes in geophysical observables from changing reservoir conditions computed by numerical simulation. We have constructed a three-dimensional reservoir model based upon various data from a geothermal field in Japan. Self-potential (SP) change has been calculated based on the reservoir model which was calibrated against long-term gravity monitoring data. The calculated SP variation is qualitatively consistent both with a relatively long-term change obtained by repeated surveys and a short-term change detected by continuous measurements, which was associated with a field-wide shut-in of production and reinjection wells for maintenance of the power station. |