Exploration Technique: Tracer Testing
|Exploration Technique Information|
|Exploration Group:||Downhole Techniques|
|Exploration Sub Group:||Well Testing Techniques|
|Parent Exploration Technique:||Well Testing Techniques|
|Information Provided by Technique|
|Stratigraphic/Structural:||Fracture zones and formation permeability|
|Hydrological:||Flow rates, flow direction, hydrologic connections, storativity|
• What tracer to select
• The amount of tracer to inject
• Where, when, and how often to collect samples
• Thermal stability: geothermal reservoirs are hot; the tracer used should be stable at temperatures greater than the highest temperature in the reservoir.
• Low background concentrations: the tracer used should not occur in high levels naturally in the geothermal environment.
• Remain dissolved in fluid: the tracer should not react with or be absorbed by the rocks within the reservoir.
• Low detectability: the tracer used should be detectible in very low concentrations and testing should be easy, fast, and inexpensive. A lot of mixing and dilution can take place while the tracer is being distributed around the reservoir and tracer testing in geothermal environments can sometimes take several months before the tracer travels through the reservoir, so intensive monitoring and analysis is required.
• Environmentally benign: tracers should never cause negative environmental effects.
- PetroWiki. Tracer testing in geothermal reservoirs [Internet]. 2013. PetroWiki. [cited 2013/10/17]. Available from: http://petrowiki.org/Tracer_testing_in_geothermal_reservoirs
- Marshall J. Reed. 2007. An investigation of the Dixie Valley geothermal field, Nevada, using temporal moment analysis of tracer tests. In: Proceedings, 32nd Workshop on Geothermal Reservoir Engineering; 2007; Stanford University. Stanford University: (!) ; p. (!)
- Peter E. Rose,Stuart D. Johnson,Phaedra Kilbourn. 2001. Tracer Testing at Dixie Valley, Nevada, Using 2-Naphthalene Sulfonate and 2,7-Naphthalene Disulfonate. In: Twenty-Sixth Workshop on Geothermal Reservoir Engineering Stanford University. Twenty-Sixth Workshop on Geothermal Reservoir Engineering Stanford University; 2001; Stanford University. Stanford University: (!) ; p. (!)
- P.E. Rose,W.R. Benoit,M.C. Adams. 1998. Tracer Testing at Dixie Valley, Nevada, Using Pyrene Tetrasulfonate Amino G, and Fluorescein. Geothermal Resources Council Transactions. .
- Gudni Axelsson,Grímur Björnsson,Francisco Montalvo. 2005. Quantitative interpretation of tracer test data. In: World Geothermal Congress 2005; 2005/04/24; Antalya, Turkey. Antalya, Turkey: World Geothermal Congress 2005; p. 24–29
- Andreas Kucha. Hydrogeology of the Blautopf spring – Tracer tests in Blauhohle cave [Internet]. 2012. [cited 2013/10/17]. Available from: http://www.agw.kit.edu/english/blauhoele_cave.php
- Coso Geothermal Area
- Dixie Valley Geothermal Area
- East Mesa Geothermal Area
- Fenton Hill HDR Geothermal Area
- Jemez Pueblo Area
- Neal Hot Springs Geothermal Area
- Raft River Geothermal Area