Reservoir rocks have much lower electrical conductivity if they are saturated with oil rather than salt water. This is the principle, well known from borehole logging, which is exploited in Sea Bed Logging.
Petroleum system analysis has been a major tool in petroleum geoscience and exploration – but can it help locate shale ‘sweet spots’ and thus increase production, reduce risk and minimize the environmental footprint?
Ocean bottom seismic (OBS) produces superior seismic images compared to those from conventional 3D streamer seismic. OBS acquisition offers the prospect of full illumination and high multiplicity of signals from the same subsurface points (high data fold).