Kinetics of fluorescein decay and its application as a geothermal tracer
- Univ. of Utah Research Inst., Salt Lake City, UT (US)
This paper reports on fluorescent which is a dye used to trace the path of injected fluids through geothermal reservoirs. The authors have measured its thermal stability at temperatures up to 300{degrees} C in hydrothermal autoclaves at various fluid compositions, pHs, and oxygen concentrations. The results of these experiments indicate that fluorescein will decay less than 10% during a one month tracer test in geothermal reservoirs with temperatures below 210{degrees} C. For tracer test involving longer times and/or higher temperatures, the activation parameters presented in this study can be used to correct for thermal decay. These parameters were applied to a tracer test conducted at the Dixie Valley, Nevada geothermal system to correct for the thermal decay of fluorescein and to deduce the effective temperature of the injection-production flow path.
- OSTI ID:
- 7239572
- Journal Information:
- Geothermics (International Journal of Geothermal Research and its Applications); (United States), Vol. 20:5; ISSN 0375-6505
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GEOTHERMAL SYSTEMS
REINJECTION
DECOMPOSITION
FLUORESCEIN
INJECTION WELLS
STABILITY
TEMPERATURE EFFECTS
TESTING
TRACER TECHNIQUES
AROMATICS
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
DYES
HYDROXY ACIDS
HYDROXY COMPOUNDS
ISOTOPE APPLICATIONS
ORGANIC ACIDS
ORGANIC COMPOUNDS
PHENOLS
POLYPHENOLS
WELLS
150906* - Geothermal Engineering- Reservoir Stimulation & Extraction Technology
150200 - Geology & Hydrology of Geothermal Systems