Feasibilty studies

A preliminary step to any marine EM survey is to carry out a feasibility study to assess the applicability of the technology.

When a marine EM survey is considered by an oil company, the standard PetroMarker's procedure is to check that the local conditions allow a sufficient probability of detection for the survey to give conclusive results.

The minimum input for the feasibility study is a resistivity model based on resistivity well log(s), and/or educated guesses from the reservoir geologists.

Other parameters such as water depth, depth to target, resistive contrast between target and over-burden, multi-target layers, proximity to bedrock, presence of salt or basalt bodies,..., are taken into account to evaluate the performance of PetroMarker's EM method.

As natural conditions are far from simple, several resistive scenarii are usually processed. In order to compensate for the inherent uncertainties of the input data, several models are usually calculated.

A set of forward modelings are provided the oil company with a ranking of detection likelihoods.