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ISSN: 2090-4541

Journal of Fundamentals of Renewable Energy and Applications
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Research Article

Reaction of Hydrothermally Altered Volcanic Rocks in Acid Solutions

Georgina Izquierdo Montalvo1, Alfonso Aragón Aguilar1, F. Rafael Gómez Mendoza2 and Magaly Flores Armienta3

1Instituto de Investigaciones Eléctricas, Reforma 113, Col. Palmira, Cuernavaca, Morelos, CP, Mexico

2Paseo Cuauhnáhuac 8532, Col. Progreso Jiutepec, Morelos, Mexico

3Comisión Federal de Electricidad, GPG. Morelia, Michoacán, Mexico

Corresponding Author:
Aguilar AA
Instituto de Investigaciones Eléctricas
Reforma 113, Col. Palmira, Cuernavaca
Morelos, CP, Mexico
E-mail: [email protected]

Received date July 22, 2015; Accepted date September 07, 2015; Published date September 14, 2015

Citation: Montalvo GI, Aguilar AA, Mendoza FRG, Armienta MF (2015) Reaction of Hydrothermally Altered Volcanic Rocks in Acid Solutions. J Fundam Renewable Energy Appl 5:183. doi:10.4172/2090-4541.1000183

Copyright: © 2015 Montalvo GI, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Rock matrix stimulation has been used to clean, to recover and to enhance well productivity in oil systems. Recently, for the same purposes this methodology began to be applied in geothermal systems. In order to investigate the solubility of altered volcanic rocks in acid solution used in rock matrix stimulation; experiments were carried out on samples of igneous hydrothermal altered rocks from the Los Humeros geothermal reservoir. Industrially, the common acid solutions used during acid well stimulation are HCl 10% and a mixture of HCl 10% and HF 5%. In this work, experiments were conducted in the laboratory using the referred acid solutions at atmospheric pressure and temperature of 110 ± 5°C.

The chemistry, the mineralogy and the permeability of selected rocks from Los Humeros geothermal field were determined before and after the reaction with each acid solution. Mineral dissolution is selective and depends on the permeability of the rocks, the type and the intensity of hydrothermal alteration.

As it is expected, Calcite readily reacts with acids leaving empty cavities, veins and micro fractures (worm holes). Calc-silicates are resistant to acid solutions. If Calcite is absent dissolution of minerals is observed in the external surfaces of the specimen in contact with the acid solution giving rise to a rough texture and leaving the rock matrix unreacted


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