Reservoir Engineering Approach to Deep Geothermal Systems

Abstract

For characterization of deep-seated geothennal reservoirs, pressure transient/interference testing is also a basic tool. In the Sumikawa geothermal field. NEDO carried out production tests of well SN-7D and successfully measured the pressure transient response. which allows us to estimate the volume and penneability of a deep reservoir discovered around intrusive granodiorite rocks. In the Kakkonda field. NEDO' s exploratory well WD-l encountered very high temperatures near the upper surface of intrusive granite body. In anticipation of pressure transient tests to be carried out in the near future. we started numerical simulation studies to predict pressure transient response in a deep reservoir under sub-and super-critical conditions.