Short-Term Microgravity Changes Due to Shut-In of Production and Reinjection Wells, the Ogiri Geothermal Field, Japan
- Key words
- Resource Characterization; gravity monitoring, shut-in, Ogiri geothermal field, numerical simulation, reservoir model
- Location
- Ogiri, Japan
- Conference
- Geothermal Resources Council Transactions
- Year
- 2006
- Session
- Resource Characterization; gravity monitoring; shut-in; nume
- Language
- English
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.
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