m. For more
information on Petroleum Geo-Services visit http://www.

claimed copyrighted

m.m. The conference call
and related materials will be archived on the web site for one year.

sonique reader

(ET). (ET) on
May 13, 2005 through 5:00 p. OSLO, Norway, Petroleum Geo-Services ASA
("PGS" or the "Company") (NYSE: PGS; OSE: PGS) announced today that as a
consequence of a recent interpretation by the Emerging Issues Task Force,
"Applying the Conditions in Paragraph 42 of FASB Statement No .5 million option premium) and, as noted above, will
be reflected as a separate line item in consolidated operating profit. The
contact details for this service are detailed below.

tones comments

GAAP, the Company will not classify Pertra as discontinued operations in
its consolidated financial statements. CET (8:00 a.

aka telephone

Replays of the conference call can be accessed from 3:00 p.

nigel telephone

pgs.

melodies laws

John Malone, Liberty Media International's Chairman and CEO, will
host the call. (ET) May 20, 2005, by dialing (719) 457-0820 or
(888) 203-1112 plus the pass code 3508463#.htm to register for the
web cast. 03-13), under
U.

000 produced

ENGLEWOOD, Colo.com/ir/default. As previously announced,
the release and the slide presentation will be based on U. and Canada (Toll-Free): +1 866-238-0638
** International (Toll -Free): +00 800 4363 7976
International (Toll): +1 703-639-1157

** Participants dialing in from Finland (990), Australia (0011), Hong
Kong (001), Japan (001 ), Korea (002), Singapore (001), or Thailand (001)
should use the designated International Access Code (+) specified here in
place of (00).

jon activism

In addition, the fourth quarter earnings conference call will be broadcast
live via the Internet. 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 , 2004.

composers comments

To participate on the simulcast of the conference call over the Internet,
please visit PGS' web site, http://www.

tone melodies

You are invited to participate
in Liberty Media International's conference call, which will begin at 11:30
a.
As previously reported, PGS will release its 2005 first quarter financial
results on Tuesday, May 24, 2005. The results will be released at
approximately 8:00 a.

tones lampoon

aka sonique

(Nasdaq: LBTYA, LBTYB) announced it will release first
quarter 2005 earnings on Friday, May 13, 2005. All interested persons should visit the Liberty Media
International web site at
http: //www. Also, the gain from
sale of Pertra will be reported on a separate line and will be included in
consolidated operating profit. A presentation has been
scheduled the same day at 9:00 am (CET ) at PGS' Headquarters at Lysaker
Norway.
Alternatively, to access the live broadcast of the conference call by
telephone, please dial-in at the number provided below, corresponding to your
location:

Location Dial-In Number
U.

composers jamming

5 million
(after considering the offsetting effect of eliminating inter-segment lease of
Petrojarl Varg) will be included in PGS' consolidated financial statements for
first quarter 2005.
A web cast and conference call have also been scheduled the same day at
2:00 p.S.

claimed tone

m.com, at least 15 minutes early, to
register and to download and install any necessary audio software.

****

Petroleum Geo-Services is a technologically focused oilfield service
company principally involved in geophysical and floating production services.

000 comments

libertymediainternational . 144 in
Determining Whether to Report Discontinued Operations" (EITF No.

****

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.

lampoon 000

S.6 million and an operating loss of $1. PGS
operates on a worldwide basis with headquarters at Lysaker, Norway.

jon 000

PGS - Classification of Pertra in Financial Statements

Central European Time (CET). ET), to discuss PGS' first quarter results. PGS owns and
operates four floating production, storage and offloading units (FPSOs).

FOR DETAILS, CONTACT:
Ola Bosterud
Sam R.

jamming reader

, Liberty Media
International, Inc.S.pgs.

Australian composers Nigel Helyer, aka Dr Sonique, and Jon Drummond have copyrighted the melodies produced by 100,000,000,000 telephone tone sequences to lampoon copyright laws.

copyright activism

You will need to be on a touch-tone telephone to ask questions . Therefore, revenues and expenses
relating to Pertra, which was sold March 1, 2005, will be included in
consolidated revenues and expenses through February 2005.3
million (including a $ 2.m.m.

copyright 100

The telephone will be open for questions at the conclusion of management's
remarks.

tones telephone

PGS provides a broad range of seismic and reservoir services, including
acquisition, processing, interpretation , and field evaluation.

produced sonique

Pertra revenues of $27.

drummond nigel

Liberty Media International Inc. Announces First Quarter Earnings Information

Links to the press release and replays of the call will also be
available on the Liberty Media International web site. The gain from the sale of Pertra amounts to $150. GAAP .com.

produced drummond

Please call Premiere Conferencing at (719) 457-2662 or (800) 946-0786 at
least 10 minutes prior to the call so that we can begin promptly at the start
time. The
conference administrator will give you instructions on how to use the polling
feature. Questions will be registered automatically and queued in the proper
sequence. As a result of these factors, actual events may differ
materially from those indicated in or implied by such forward-looking
statements. Morrow
Christopher Mollerlokken
Phone: +47 6752 6400

US Investor Services,
Renee Sixkiller ,
Phone: +1 281 509 8548