Advanced Geophysical Operations and Services Inc. (AGCOS) participated in Near Surface Geoscience 2014 Conference and Exhibition (September 14 -18) at Divani Caravel Hotel, Athens, Greece. As part of First Applied Shallow Marine Geophysics Conference technical program, AGCOS  presented “Shallow Marine EM Receivers for Coastal Shelf and Transition Zones“.

Shallow Marine EM Receivers for Coastal Shelf and Transition Zones

Summary

Substantial costs associated with offshore drilling highlight the importance of additional geophysical information for the decision makers. This information can be provided by seabed MT (natural source EM field) or seabed logging (MCSEM). These techniques are fairly well developed for relatively deep water but depths of less than 200m, and particularly less than 20m, cause certain difficulties. Both AUSS systems (10-200m) are designed to reduce the influence of induced noise when deployed in shallow marine environments. The main advantage of these systems is their low weight, which allows them to be deployed from relatively small vessels. A unique feature of the 5-component (2E+3H) system is the automatic leveling of the platform and, most importantly, of all three magnetic sensors at the seabed, which allows accurate measurement of a vertical magnetic component. The SMMT system (0-50m) has a very low profile, aerodynamic shape not affected by currents and waves, and a unique recovery system that does not leave an environmental footprint on the seabed unlike common industry practice. In addition to oil and gas exploration, the equipment can be successfully applied to tectonics, geodynamics, pipelines, underwater cable routes and geological engineering investigations.