Influence of sea water resistivity on MCSEM data

The Marine Controlled Source ElectroMagnetic (MCSEM) is a new geophysical method that is very promising in the detection of resistive layers in the rocks under the oceanic floor, a useful information for the oil industry. In this work is model MCSEM data including variations in the resistivity of the ocean water. Such variations can arise from the influence of marine currents, temperature gradients or any other source of influence on the water salinity. We observe that the data from this method are significantly affected by those variations. As much the variation in resistivity how much in the thickness of the water layer it can affect the results of the MCSEM in similar form.