Tracer Testing At Dixie Valley Geothermal Area (Reed, 2007)

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Exploration Activity: Tracer Testing At Dixie Valley Geothermal Area (Reed, 2007)

Exploration Activity Details
Location Dixie Valley Geothermal Area
Exploration Technique Tracer Testing
Activity Date 1998 - 2004

Usefulness useful
DOE-funding Unknown

Exploration Basis
The tracer testing was done to estimate swept volume and fluid velocity between pairs of production and injection wells. Several different chemicals were experimented with during this series of tracer testing.
several tests were conducted over a few years. Six similar but distinguishable chemical tracers of naphthalene-sulfonate compounds were injected into six different injection wells. 2-naphthalene sulfonate and 2.7-naphthalene disulfonate were two of the successful chemical tracers studied under laboratory conditions. These compounds were found to have no decay after a week at 330 degrees Celsius. Prior to those compounds successful tests had also been done with amino G and preen tetrasulfonate compounds. Tracer analysis was conducted by a combination of liquid chromatography and ultraviolet-fluorescence spectroscopy. Mean residence time, fracture volume in contact with tracers, fluid velocity and heterogeneity were calculated and compared. The tracers were injected in the center of the Dixie Valley Geothermal Field and recovered from the northeastern and southwestern production wells. This showed that there is no barrier to flow between the two areas of production wells.

Additional References