PGS ADS Starts Trading on the NYSE

PGS ADS Starts Trading on the NYSE 


OSLO, Norway, Dec. 17  /PRNewswire-FirstCall/ -- Petroleum Geo-Services ASA
("PGS" or the "Company") (OSE:PGS)(NYSE:PGS) announced today that its American
Depositary Shares ("ADS") were listed and started trading as planned on the New
York Stock Exchange ("NYSE") on December 17, 2004 under the ticker symbol
"PGS".

Petroleum Geo-Services is a technologically focused oilfield service company
principally involved in geophysical and floating production services. PGS
provides a broad range of seismic- and reservoir services, including
acquisition, processing, interpretation, and field evaluation.  PGS owns and
operates four floating production, storage and offloading units (FPSOs) and
owns a small oil and gas company.  PGS operates on a worldwide basis with
headquarters in Oslo, Norway.  For more information on Petroleum Geo-Services
visit http://www.pgs.com/.

The information included herein contains certain forward-looking statements
within the meaning of Section 27A of the Securities Act of 1933 and Section 21E
of the Securities Exchange Act of 1934. 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 as disclosed by the Company in its
filings with the Securities and Exchange Commission including the Company's
most recent Annual Report on Form 20- F for the year ended December 31, 2003. 
As a result of these factors, actual events may differ materially from those
indicated in or implied by such forward-looking statements.

   Ola Bosterud
   Sam R. Morrow
   Svein T. Knudsen
   Phone: [phone]
   Suzanne M. McLeod
   Phone: [phone]


DATASOURCE: Petroleum Geo-Services ASA



CONTACT:  Ola Bosterud, Sam R. Morrow, Svein T. Knudsen, [phone],

or Suzanne M. McLeod, [phone], all for Petroleum Geo-Services ASA



Web site:  http://www.pgs.com/ 

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