| Title | Copahue Geothermal System, Argentina - Study of a Vapor-Dominated Reservoir |
|---|---|
| Authors | Shigetaka Nakanishi, Makoto Abe, Norifumi Todaka, Mamoru Yamada, JosÈ L. Sierra, Mario 0. Gingins, Luis C. Mas and Graciel |
| Year | 1995 |
| Conference | World Geothermal Congress |
| Keywords | Copahue geothermal field, Argentina, conceptual model, vapor-dominated reservoir |
| Abstract | This paper presents the conceptual model of the Copahue geothermal field in province, Argentina, and the results of resource assessment performed in the collaborating study project between Japan and Argentina. The field is characterized by activities related to active volcano and horst structure in the basin structure formed by volcanic depression. The geothermal manifestation where superheated steam is discharging are distributed in the horst. The vapor-dominated reservoir of more than 230?C in temperature was confirmed by exploratory wells below a depth of The reservoir is covered with an alteration zone and lacustrine deposits as a cap rock and is surrounded by impermeable zones. Based on the available geological, geophysical, geochemical, and reservoir engineering data involving new data of a well drilled in the project, it is concluded that the Copahue field is a promising prospect for future development, with the potential of over |