Considerations on the Origin of Acid Fluids in Los Humeros Geothermal Field, Pue., Mexico
- Key words
- Los Humeros; Mexico; Hydrothermal Mineralogy; Acid Fluids
- Location
- Los Humeros, Mexico
- Conference
- Geothermal Resources Council Transactions
- Year
- 2009
- Session
- Geological surveys; Geochemical surveys; Acid
- Language
- English
Abstract
The Los Humeros geothermal field is one of the four geothermal fields currently operating in Mexico. It has an installed capacity of 40 MW with eight back pressure units of 5 MW each. The Los Humeros system has been the subject of a great number of studies on different subjects. From the geochemical and geological points of view some inconsistencies have been reported. The occurrence of low pH fluids in wells of one of the most profitable area of the field has been related to a deep acid reservoir. Additionally it has been suggested the existence of at least two reservoirs. At present, it is considered that there is a single reservoir hosted in Tertiary andesites, 1200 m thick in average, with several feeding zones. Fluids at the discharge are a mixture of steam and a low liquid fraction. No evidence of an acid reservoir has been found. In this work conclusions of the occurrence of acid fluid in the Los Humeros reservoir are presented.
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