The concept was trialled in 1998 using a towed, high-power EM source and a series of seabed receivers. By logging the refracted energy from subsurface layers, our company's founders, who then worked for Statoil, were able to identify areas of high electrical resistivity such as hydrocarbon reservoirs.
The process of testing the theory continued unabated for five years – from small-scale tank tests to full-scale offshore surveys. The technique, which was initially called seabed logging because of its similarities to borehole resistivity logging, proved successful.
In 2002, EMGS was established to provide commercial services in what has become widely known as controlled source electromagnetics (CSEM). Since then, we have conducted over 650 surveys. Our company remains the undisputed market leader, trains the world’s leading marine CSEM experts and ceaselessly refines the technology and systems used to acquire, process, integrate, visualise and interpret high-quality marine CSEM data.
Studies demonstrate that CSEM surveying correctly applied can significantly increase drilling success rates.