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Reservoir pressures, temperatures and chloride concentrations are interpreted from well measurements in the Kakkonda geothermal field (Japan), to obtain a natural state conceptual model and to determine changes in the reservoir subsequent to production and reinjection. In this model the system is viewed as two reservoirs, a shallow reservoir extending from the surface to about 800 m below sea level...
A high-resolution seismic network at the Coldwater Creek Steam Field (CCSF) in the Northwest Geysers region has provided data with which to estimate three-dimensional P- and S-wave velocity models and to relocate hypocenters. The seismicity distribution and resulting seismic velocity structure, coupled with the known geology, are used to characterize the geothermal reservoir. The velocity structure...
The quantification of the amount of water retained in geothermal reservoir rocks allows a more realistic estimation of reserves for vapor-dominated geothermal reservoirs. If the measured desorption isotherm resembles the production characteristics of a geothermal system, understanding of the adsorption/desorption hysteresis will aid the design of reinjection processes.Adsorption/desorption isotherms...
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