TGS- Q2 Presentation and telephone conference

TGS-NOPEC's Q2 2001 financial results will be presented at Oslo Stock Exchange on Thursday August 16th at 08,30. The presentation will be done by CFO Arne Helland and General Director Europe Kjell E. Trommestad and will be webcasted live over http://www.financialhearings.com. The presentation can also be accessed via our website http://www.tgsnopec.no where interested parties may test in advance their technical ability to follow the hearing by following a test routine on http://www.tgsnopec.no start page.

Telephone conference at 17,00 Norwegian Time, 11 AM New York time. In addition, TGS-NOPEC offers a telephone conference hosted by CEO Hank Hamilton and CFO Arne Helland on the same day, August 16th at 17,00 Norwegian time (11,00 AM New York time). Norwegian attendees are invited to call 800 80 119 and international attendees are invited to call +47 23 000 400. Attendees may want to call 5-10 minutes before 17,00 (11,00 AM NY) hours to ensure registration and access. A Q&A session will follow the presentation. To pose a question, please press *1.