| Title | The Use of Amino G as a thermally Reactive Tracer for Geothermal Applications |
|---|---|
| Authors | Peter ROSE and Scott CLAUSEN |
| Year | 2014 |
| Conference | Stanford Geothermal Workshop |
| Keywords | tracers, thermally reactive tracers, geothermal, Dixie Valley, Amino G, substituted naphthalene sulfonates |
| Abstract | A thermally reactive tracer can be used in combination with a conservative tracer within a geothermal reservoir to determine the effective temperature along an injection-production pathway. The thermal decay kinetics of the uv-fluorescent optical brightener 7-amino-1,3-naphthalenedisulfonate (Amino G) was measured under simulated geothermal conditions using a high-temperature laboratory batch reactor. The decay product was shown to be a fluorescent, water-soluble compound possessing greater thermal stability than the parent compound. Amino G and its daughter product thus represents a new tracer pair for use in geothermal reservoirs, suggesting that other amino-substituted naphthalene sulfonates might also be used as geothermal tracers. A tracer test demonstrated the successful use of Amino G at the Dixie Valley geothermal field. |