Tracer Testing At Coso Geothermal Area (2004)

From Open Energy Information

Exploration Activity: Tracer Testing At Coso Geothermal Area (2004)

Exploration Activity Details
Location Coso Geothermal Area
Exploration Technique Tracer Testing
Activity Date 2004
Usefulness not indicated
DOE-funding Unknown

Exploration Basis
To determine the EGS potential of the Coso Geothermal Field
A dramatic decrease in the ratio of chloride to boron was observed in the liquid discharge of a well proposed for EGS development. The decrease appears to be related to the transformation of some feed zones in the well from liquid-dominated to vapor-dominated. High concentrations of boron are transported to the wellbore in the steam, where it fractionates to the liquid phase flowing in from liquid-dominated feed zones. The high-boron steam is created when the reservoir liquid in some of the feed zones boils with a steam fraction greater than 90%. Combination of boron from both phases into the liquid phase results in the Cl/B ratio dropping from 40 to as low as 20.

Additional References