Detection of deep structures
The geology and hydrology of a geothermal system is the basis for a reasonable decision on where and how to exploit a geothermal reservoir. However the observations at the surface are only a first indicator – what we need is and understanding of the deep geological structures. GEMex will use a range of geophysical methods to investigate the underground of the geothermal fields in Acoculco and Los Humeros.
GEMex builds on the developements of seismic and resistivity methods that have been the subject of former and ongoing European projects I-GET and IMAGE . In Mexico these methods will be tested and advanced. The results obtained within the project will also be compared to the models from the two first deep drilling projects in Iceland (IDDP-1 in Krafla and IDDP-2 in Reykjanes ).
In GEMex, the detection of deep structure is achieved by 4 main activities:
- Resistivity imaging from magnetotellurics (MT) and transient electromagnetics (TEM)
- Seismic imaging from earthquake analysis, travel-time tomography and ambient noise correlation methods
- Evaluation of other geophysical data, such as gravity, magnetics, GPS and InSAR
- Integration of the methods, improved models through constraints from other geophysical