| Title | Short-Term Microgravity Changes Due to Shut-In of Production and Reinjection Wells, the Ogiri Geothermal Field, Japan |
|---|---|
| Authors | Sugihara, Mituhiko; Ishido, Tsuneo; Horikoshi, Takamasa |
| Year | 2006 |
| Conference | Geothermal Resources Council Transactions |
| Keywords | Resource Characterization; gravity monitoring, shut-in, Ogiri geothermal field, numerical simulation, reservoir model |
| Abstract | We have carried out the so called hybrid gravity measurements at the Ogiri geothermal field in March – April 2003, during which field wide shut-in of production/reinjection wells took place, and detected small changes less than five microGal. The distribution of measurement stations showing gravity increase and decrease during the shut-in are consistent with the locations of main production and reinjection zones respectively and reproduced by numerical simulation based on a reservoir model which is constructed from various reservoir engineering data. |