When commercialization of CSEM began, experimental sources were available but no custom source systems existed for large scale, day-to-day operation in ultra- deep water. Our conventional source system is proven to operate stable over time, globally from tropical to arctic waters and can transmit 1200 A with a typical dipole moment of 360 kAm. The source systems are synchronized to GPS time and have an overall accuracy of ~1%.
Surface-towed source, ShelfXpress
To improve depth of investigation and bandwidth for acquisition in shallow water, EMGS developed a high-power, surface-towed source with deck-mounted power electronics. The broad band source system has a maximum output current of 7200 A and a maximum dipole moment of 2,100 kAm. The horizontal electric dipole antenna is positioned using surface GPS buoys for improved accuracy. The dipole can be towed with up to 4 knots and the system is efficient at water depths up to 400m, depending on the geological setting.
DeepBlue source system
The DeepBlue source system was developed by EMGS under a Joint Industry Project (JIP) and in cooperation with our sub-suppliers. DeepBlue is a deep-towed source combining innovations in subsea high-power electronics and improved navigation capable of providing an output of up to 10,000 amps that can operate in water depths up to 4,000 m. The new source can be used to see smaller and deeper targets, while also increasing imaging confidence and resolution for targets that can already be detected with EMGS’ conventional deep-towed source system.