Preliminary Analysis of Tracer Response and Thermal Cooldown Estimates for the Mumovsky Geothermal Field in Kamchatka, USSR

Abstract

A fluorescein tracer injection test was carried out at the Mutnovsky geothermal field in Kamchatka, USSR to evaluate reservoir characteristics in preparation for the construction of a 50-MWe power plant. The test consisted of a 6-hour pulse tracer injection in an observation well very close to two production wells, followed by four weeks of fluid reinjection from one of the nearby wells, with monitoring at several wells in the production zone. A joint study is underway to combine analysis of the tracer response and simulated thermal cooldown based on the very close-spaced flow geometry and estimated thennal t~o~erties of the reservoir. The results show bot& rapid tracer breakthrough and a rapid thermal decUne transient. The test provided improved estimates of the effedive res porosity and reservoir thickness. comparfson Of the tracer-test data with the area, and the Mutnovsky volcano. The GOrd *inuated heat-meep es the paper.