2nd GEMex Side-event

GEMex researchers will present their results during the European Geothermal Workshop on 9-10 October 2019 in Karlsruhe, Germany.

GEMex researchers are invited to present their results during the EGW on:

  • Results from geological, geochemical and geophysical investigations in Los Humeros and Acoculco, Mexico

  • Results from geological, temperature and reservoir modelling

  • Results from technology development for super hot geothermal reservoirs

More info on this event here

Social impacts and Public engagement

Social impacts of enhanced and superhot geothermal systems

Figure 8: Left: Workshop within the local community of Cruz Colorada. Right: Participatory workshop with selected stakeholders at the Acoculco exploratzion site.

The communities of Cruz Colorada, Jonuco Pedernales, San Francisco Terrerillos and Ocojala are located within the exploration site of Acoculco. The GEMex team conducted social work in these communities and focused on participatory workshops and semi-structured interviews in order to get feedback, knowledge and experience from people who live in an environment with enhanced geothermal potential. Additionally, the interviews were useful to get to know the socio-cultural dynamics of these communities. Parallel to this work, previous and present conflict situations are evaluated, as well as the social acceptance of the activities done by the project and the possibility of geothermal energy to be develop in this site, from a social point of view.

A successful workshop on public engagement in Acoculco instead of Social impacts of enhanced and superhot geothermal systems.

In April 2018, the European and Mexican research teams took part in a workshop organized at the University of Puebla by the Mexican partners, with the participation of numerous students and CFE representatives. It was the occasion for presenting the numerous social engagement and environmental activities carried out in Mexico, in particular in Los Humeros and Acoculco areas, by CFE and the Mexican GEMex team. On the other hand, European GEMex partners presented their work regarding the interplay between geothermal energy and society, the relation between companies and consumers in energy-based context, the company’s activities aimed at reaching geothermal energy social acceptability and suitable governance models for developing energy infrastructure.


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The site at Acoculco, foreseen for EGS development, has been explored by two deep wells drilled by the CFE (Comisión Federal de Electricidad). These wells found hardly any fluids but temperatures around 300°C at a depth of 2 km. The lack of fluids at depth is surprising, as this area of Mexico is subject to abundant precipitation. Nonetheless, the high temperature gradient makes it an interesting target for exploitation and the lack of a clear resource makes it an ideal region for testing our knowledge on how to constrain an area where EGS can be performed.

Los Humeros

The geothermal system at Los Humeros is currently exploited. The northern part of the area, however, is much hotter (>380°C) than the wells used for production today. The development of this part of the reservoir presents a challenge, both because of the high temperature and because of the water chemistry. In addition, the area has only been poorly characterised by geophysical and geological surveys. Therefore our understanding required for the development and exploitation of this super-hot resource is limited. The uncertainty about the potential of this resource and the technical challenges involved with the development of such a super-hot geothermal system currently prevent its economic development.