MT measurements can, therefore, form an excellent complement to other geophysical data, particularly in settings where high-impedance volcanic rocks or salt make the interpretation of other geophysical data challenging.

Large receiver capacity

The high-sensitivity, low-noise receivers used for measuring MT data are exactly the same as those used for CSEM data acquisition. The large receiver capacities of our vessels offer the optimal MT data recording time during a survey. Using more receivers means they remain on the seafloor for longer during data acquisition, which automatically increases the duration of MT data recording and, additionally, affords increased data processing options for the MT data acquired. Apart from during pure MT data recording time, uncontaminated MT data are also recorded during 3D CSEM acquisition when the CSEM source is active in the part of the receiver grid far from the recording receiver. Thus, MT data are acquired inherently during CSEM surveys. A longer MT data recording time is nearly always better, particularly for the longer and shorter periods.

Read also: A guide to CSEM

Key features

  • better imaging of basalt thickness and identification of sub-basalt sediments
  • EM data as input to enhance seismic-velocity models
  • identification of stratigraphic events at extreme depths
  • enhanced understanding of trap thickness, geometry and presence or absence of sediments beneath sub-basalt

Deliverables

  • 2D inversion report
  • SEG-Y files from inverted models
  • Processed data in zmm, edi and h5 format