Faster and more accurate mapping of reservoirs

The electromagnetic deep-water transmitter DeepXpress collects data twice as fast as the previous generation. The operating time for launch and collection is reduced by 75% and availability for service and maintenance is significantly improved.

Inventas has worked closely with EMGS in the development of the new DeepXpress towfish, working on flow characteristics, product architecture and mechanics.

Power electronics, pressure compensation system and navigation equipment of up to two tonnes was to be integrated with requirements for both easy access and the effect of how the transmitter would behave in water. Flow calculations (CFDs) were therefore an important part of the process to optimize the hydrodynamic properties and eliminate noise.

EMGS new version of the transmitter is designed to be towed stable even at 4,000 meters depth and at speeds up to 5 knots, which are over twice as high speed as before. The new product provides a better and more accurate result, with a significant reduction in time and costs.

DeepXpress has already conducted surveys in the Barents Sea and the Gulf of Mexico with great success. The transmitter behaves well in the water and one can now map areas more than twice as fast. Even the time for deployment/commissioning and termination/lifting is reduced by almost 75%.

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Electromagnetic surveys

The method of using electromagnetic technology is relatively new, but has already been used in several places as a supplement to ensure better data. Electromagnetic waves propagate differently through different elements, and the return signals can thus be used to create an image of the subsurface that increase the likelihood of making a discovery of hydrocarbons.

EM measurements is done by a ship towing a transmitter close to the seabed. The electromagnetic waves that are transmitted propagate through the sea water into the seabed where they are reflected into a network of receiving antennas laid out there. The quality of the results of reservoir testing is highly dependent on the stability of the EM ray emitting equipment.