Simulation study of the Matsukawa geothermal reservoir: natural state and its response to exploitation

A numerical simulation study on the natural state of the Matsukawa, Japan geothermal reservoir was carried out with a simplified two-dimensional cross-sectional model. The results agreed reasonably well with the observed data and showed that there was a thin vapor-dominated zone at the shallow part of the reservoir. The results clearly indicate that the ideas on the natural state of the Matsukawa geothermal reservoir presented by Hanano and Matsuo (1990) are feasible.