January 7, 2019: Oslo, Norway, PGS updates on changes of the contract for the 3D survey in South America announced November 14, 2018.

The vessels Ramform Atlas and Ramform Tethys mobilized early December 2018 for this survey.  The contract had an estimated total duration of approximately 13 vessel months and an estimated value in excess of $75 million.

Due to unresolved issues affecting the survey, both vessels have been on paid standby from December 23, 2018.

The client, ExxonMobil, has notified PGS that the Ramform Atlas is no longer required. PGS will receive payment for mobilization, work performed, standby and demobilization. PGS expects to deploy the vessel on a MultiClient program or contract survey shortly, but will incur idle time relating to steaming and possibly standby before commencing an alternative project.

ExxonMobil plans to deploy the Ramform Tethys to acquire a 4D survey offshore Guyana. The vessel will continue on paid standby until she commences the redefined program. PGS expects the vessel to be operating in the area for at least three months.

For details, contact:
Bård Stenberg, SVP IR & Communication
Mobile: +47 992 45 235

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Petroleum Geo-Services ASA and its subsidiaries ("PGS" or "the Company") is a focused marine geophysical company that provides a broad range of seismic and reservoir services, including acquisition, imaging, interpretation, and field evaluation. The Company MultiClient data library is among the largest in the seismic industry, with modern 3D coverage in all significant offshore hydrocarbon provinces of the world. The Company operates on a worldwide basis with headquarters in Oslo, Norway and the PGS share is listed on the Oslo stock exchange (OSE: PGS). For more information on PGS visit www.pgs.com.

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The information included herein contains certain forward-looking statements that address activities, events or developments that the Company expects, projects, believes or anticipates will or may occur in the future. These statements are based on various assumptions made by the Company, which are beyond its control and are subject to certain additional risks and uncertainties. The Company is subject to a large number of risk factors including but not limited to the demand for seismic services, the demand for data from our multi-client data library, the attractiveness of our technology, unpredictable changes in governmental regulations affecting our markets and extreme weather conditions. For a further description of other relevant risk factors we refer to our Annual Report for 2017. As a result of these and other risk factors, actual events and our actual results may differ materially from those indicated in or implied by such forward-looking statements. The reservation is also made that inaccuracies or mistakes may occur in the information given above about current status of the Company or its business. Any reliance on the information above is at the risk of the reader, and PGS disclaims any and all liability in this respect.