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MT AMT Key Advantages and Benefits

 

The magnetotelluric surveys reach great depths in confined spaces.

They are used in general to define the geological and hydrogeological setting for the following applications:

 

  • Definition of structures of deep gravitational instability (deep landslide);
  • Definition of geological and tectonic structures for tunneling design;
  • Definition of geothermal and hydro‐geological models for the optimal location of wells;
  • Great depth of penetration (10’s of kms);
  • Provides information in non-seismic or poor seismic areas;
  • No transmitter required;
  • Light-weight equipment — very portable (good for reconnaissance);
  • Good production rate (2 – 5 km/day);
  • Better resolution than grav/mag;
  • Well-developed interpretation procedure;
  • Fast interpretation;
  • Little impact on environment;
  • Can access almost anywhere;

 

Acquisition systems are based on lightweight 24-bit 5-channel GPS-synchronized recording units covering the frequency range from 0 to 50 kHz.

 

The data acquisition system has  a receiver unit (Unit MT), two electromagnetic sensors, and four electrodes  the placement of 4 electrodes arranged in a cross the disposition of the two orthogonal magnetic sensors at a distance of about 25 m from the instrument receiver.

 

Magnetotellurics MT / AMT – Oil and Gas Exploration 

To Magnetotellurics MT / AMT, the conditions which cause difficult seismic energy propagation are largely irrelevant and so the method readily images the resistivity of the sub-surface.

 

MT Geothermal Exploration

The contrast of resistivity provides an excellent tool for identifying geothermal targets.