Fluid Inclusion Analysis At Coso Geothermal Area (2003)

From Open Energy Information

Exploration Activity: Fluid Inclusion Analysis At Coso Geothermal Area (2003)

Exploration Activity Details
Location Coso Geothermal Area
Exploration Technique Fluid Inclusion Analysis
Activity Date 2003
Usefulness not indicated
DOE-funding Unknown

Exploration Basis
1) Fracture/stress analysis. 2)To determine the driver of the relationship between hydrogen and organic species.
1) Fluid inclusion analyses of cuttings from well 83-16 were used to determine the temperatures of vein mineralization. 2) Measurement of organic compounds in fluid inclusions shows that there are strong relationships between H2 concentrations and alkane/alkene ratios and benzene concentrations. Inclusion analyses that indicate H2 concentrations > 0.001 mol % typically have ethane > ethylene, propane > propylene, and butane > butylene. There are three end member fluid compositions that were identified: type one fluids in which alkane compounds predominate, type two fluids that have ethane and propylene and no ethylene and propane, and type three fluids that have propylene and butylene and no propane or butane. The change in alkane/alkene ratios downhole would be reversed if the reactions were temperature driven. Calculations explain why benzene is a common constituent of geothermal fluids.


Additional References