Fluid Stratigraphy and Permeable Zones of the Coso Geothermal Reservoir
Conference Proceedings: Fluid Stratigraphy and Permeable Zones of the Coso Geothermal Reservoir
Abstract
A fence-diagram for the Coso geothermal reservoir is developed from Fluid Inclusion Stratigraphy (FIS) analyses. Fluid inclusion gas chemistry in well cuttings collected at 20 ft intervals is analyzed and plotted on well log diagrams. The working hypothesis is that select gaseous species and species ratios indicate areas of groundwater and reservoir fluid flow, fluid processes and reservoir seals. Boiling and condensate zones are distinguished. Permeable zones are indicated by a large change in the relative concentrations of the ratio of CO2/N2. A thick condensate and boiling zone is indicated across the western portion of the field. The east flank area has a thinner condensate zone and thicker seal zone than the western portion.The boiling zones for both the western portion of the field and the east flank correspond to areas of increased permeability and present day production zones. Reservoir fluids are shown to rise to the north, which agrees with fluid inclusion studies. Combining the location of the reservoir fluids and permeable zones, likely production zones can be targeted in the future
- Authors
- Dilley, L. M.; Norman, D.I.; Moore, J.; McCulloch and J.
- Published
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Citation
Dilley, L. M.; Norman, D.I.; Moore, J.; McCulloch, J.. 1/1/2006. Fluid Stratigraphy and Permeable Zones of the Coso Geothermal Reservoir. Proceedings of (!) ;
(!) : Geothermal Resource Council Transactions 2006.
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