OHM DETECT

An OHM DETECT survey delivers basic resistivity results in geologically simple environments. It is a cost-efficient option when there is little ambiguity in the resistivity structure of the subsurface.

Even in the most simple survey environment, pre-survey modelling with source waveform design is critical to the success of Controlled Source Electromagnetic Imaging (CSEMI).

detection

The interpretation of an OHM DETECT survey is typically limited to normalised anomaly versus offset curves. In a very well constrained resistivity environment, such interpretation can have value. However the OHMVision INV2D and DEFF interpretations from an OHM RESOLUTION survey provide intuitive depth specific images. Such images locate resistive features, for example, hydrocarbons and volcanic sills.

In typical exploration environments,OHM RESOLUTION is a more applicable survey to OHM DETECT. A RESOLUTION survey is able to map out multiple resistors and constrain resistivity changes at all depths within the overburden.