Equinor and Alcatel Submarine Networks Sign Contract for Permanent Reservoir Monitoring on Johan Castberg Field

Alcatel Submarine Networks and Equinor have signed a contract for the implementation of a PRM system on the Castberg oil field.Alcatel Submarine Networks Press Release
August 24, 2018

Paris, France – Alcatel Submarine Networks (ASN) and Equinor have signed a new contract for the engingeering, procurement, construction and installation of a permanent reservoir monitoring (PRM) system on the Castberg field in the Barents Sea.

With more than 200 kilometers of seismic cables installed on the seabed and more than 3 700 seismic sensors covering an area of more than 60 square kilometers, Johan Castberg will deploy ASN’s all optic seismic technology and will help Equinor further strengthen its ability to optimize production. The seismic cables will be installed on the seabed of Johan Castberg during 2022.

With PRM, seismic sensors are permanently deployed on the seabed which enables more frequent and much improved seismic images detecting changes in the reservoir. The system on Johan Castberg will be based on ASN’s optical fiber technology which is designed to allow very high performance and superior reliability.

Philippe Piron, president of Alcatel Submarine Networks, said: “This new PRM contract further strengthens the relationship between ASN and Equinor. It also demonstrates the relevance of PRM technology to provide 4D seismic data to the most technologically advanced oil Companies. Our fiber optic reservoir monitoring system will support Equinor in increasing oil recovery in a cost -efficient way.”

This new project follows the signature of a contract for the installation of DC/FO™ technology for the Johan Castberg field in December 2017 and the signature of a PRM contract for Johan Sverdrup field ealier in 2018.


Equinor is an international energy company with a proud history. Formerly Statoil, we are 20,000 committed colleagues developing oil, gas, wind and solar energy in more than 30 countries worldwide. Eqinor is the largest operator in Norway, among the world’s largest offshore operators, and a growing force in renewables. Driven by our Nordic urge to explore beyond the horizon, and our dedication to safety, equality and sustainability, Equinor is building on a global business on our values and the energy needs of the future.


Alcatel Submarine Networks, part of Nokia, leads the industry in terms of capacity and installed base with more than 600,000 km of optical submarine cables/systems deployed worldwide. From traditional telecom to new oil and gas applications, ASN provides every part of a global undersea transmission network, all tailored to the customer’s needs. An extensive service portfolio completes its comprehensive offering for the submarine business, including project management, installation and commissioning and marine operations and maintenance performed by its fleet of cable ships.


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