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Outcrop analogue study to determine reservoir properties of the Los Humeros and Acoculco geothermal fields, Mexico

Weydt, Leandra M. and Bär, Kristian and Colombero, Chiara and Comina, Cesare and Deb, Paromita and Lepillier, Baptiste and Mandrone, Giuseppe and Milsch, Harald and Rochelle, Christopher A. and Vagnon, Federico and Sass, Ingo :
Outcrop analogue study to determine reservoir properties of the Los Humeros and Acoculco geothermal fields, Mexico.
[Online-Edition]
In: Advances in Geosciences, 45 pp. 281-287. ISSN 1680-7359
[Article], (2018)

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Item Type: Article
Title: Outcrop analogue study to determine reservoir properties of the Los Humeros and Acoculco geothermal fields, Mexico
Language: English
Abstract:

The Los Humeros geothermal system is steam dominated and currently under exploration with 65 wells (23 producing). Having temperatures above 380 ◦C, the system is characterized as a super hot geothermal system (SHGS). The development of such systems is still challenging due to the high temperatures and aggressive reservoir fluids which lead to corrosion and scaling problems. The geothermal system in Acoculco (Puebla, Mexico; so far only explored via two exploration wells) is characterized by temperatures of approximately 300 ◦C at a depth of about 2 km. In both wells no geothermal fluids were found, even though a well-developed fracture network exists. Therefore, it is planned to develop an enhanced geothermal system (EGS). For better reservoir understanding and prospective modeling, extensive geological, geochemical, geophysical and technical investigations are performed within the scope of the GEMex project. Outcrop analogue studies have been carried out in order to identify the main fracture pattern, geometry and distribution of geological units in the area and to characterize all key units from the basement to the cap rock regarding petro- and thermo-physical rock properties and mineralogy. Ongoing investigations aim to identify geological and structural heterogeneities on different scales to enable a more reliable prediction of reservoir properties. Beside geological investigations, physical properties of the reservoir fluids are determined to improve the understanding of the hydrochemical processes in the reservoir and the fluid-rock interactions, which affect the reservoir rock properties.

Journal or Publication Title: Advances in Geosciences
Volume: 45
Publisher: Copernicus
Classification DDC: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften
Divisions: 11 Department of Materials and Earth Sciences > Earth Science
Date Deposited: 14 Feb 2019 13:38
Last Modified: 14 Feb 2019 13:38
DOI: 10.5194/adgeo-45-281-2018
Official URL: https://doi.org/10.5194/adgeo-45-281-2018
URN: urn:nbn:de:tuda-tuprints-84782
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/8478
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