Tracer Testing at Kizildere Geothermal Field, Turkey, Using Naphtalene Sulphonates

Abstract

Kizildere Geothermal Field, Turkey, which is one of the oldest high enthalpy geothermal fields in Turkey is in third development stage. In order to optimize re-injection a tracer test where four tracers (Fluorescein and 3 different naphthalene sulphonates) were simultaneously injected into four different re-injection wells, was conducted. Quantitative and qualitative analysis of tracer concentrations measured using HPLC were used to identify connectivity between the re-injection and production wells. Flow – storage capacity plots were used to identify flow geometry. It has been concluded that tracer return patterns slightly changed in some production wells. The results showed that a single fracture model can be used to model tracer returns for most wells. Finally a capacitance resistance model was to confirm tracer results.