An HDR system hydraulics model and detailed analysis of the 1991 circulation test at the Hijiori HDR site, Japan

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:175635

Hyodo, M; Shinohara, N; Takasugi, S ^[1]

---

1. and others

While the ultimate goal of HDR production is to extract energy in the form of heat from a reservoir, accomplishing this goal requires circulating fluid through a complex hydraulic system. This paper describes the development of an appropriate simplified hydraulic system model of the HDR process for both steady-state and transient flow conditions. The reservoir/wellbore system is partitioned into a number of component flow impedances, hydrostatic elements, and fluid storage elements. The model application is demonstrated through a detailed analysis of the FY 1991 90-day circulation test performed in the shallow reservoir of the Hijiori HDR site in Japan. Earlier reporting on the Hijiori 90-day circulation test revealed some exciting results -- 78% fluid recovery at in injection rate of 60 tons/hour and production temperatures of 150{degrees} - 190{degrees}C -- but was published before any detailed analysis of flow conditions was undertaken. The detailed analysis contained in this paper provides great insight into the reservoir hydraulic parameters and the effects of the various reservoir stimulations that were performed during the test. Careful analysis of this data has also greatly aided the test design, and recommendations for data collection procedures, for the upcoming (1995 - 2000) circulation tests to be performed in the deep reservoir at the Hijiori site.

• OSTI ID: 175635
• Report Number(s): CONF-951037--
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
FLOW MODELS
GEOTHERMAL RESOURCES
HEAT EXTRACTION
HOT-DRY-ROCK SYSTEMS
HYDROLOGY
JAPAN
RESERVOIR ROCK