TGS 3rd quarter 2005 update teleconference replay

11 October 2005

TGS-NOPEC offered on Tuesday 11. October at 15,00 Norwegian time (09,00 AM New York time) a telephone conference hosted by CEO Hank Hamilton, VP Business Development John Adamick and CFO Arne Helland, with a short introduction followed by a Q&A session.
The conference was based upon the Q3 2005 Earnings Update issued on Monday 10. October.

Interested parties who were unable to attend live, may access a replay approx. 1 hour after the conference has ended, by dialing:

+47- 22 76 91 21

account no: 1193 followed by # (pound-sign)

press 1

Conference no: 193 followed by # (pound-sign)

press 1 to play.

Please call Arne Helland at +47 91 88 78 29 should you need more information about this.

TGS-NOPEC Geophysical Company (TGS) is a leading global provider of multi-client geoscientific data, associated products and services to the oil and gas industry. TGS specializes in the creation of non-exclusive seismic surveys worldwide. The company also provides advanced depth imaging solutions and software through its TGS Imaging division. A2D Technologies, a wholly-owned subsidiary, is the energy industry's well log data marketplace offering the largest online database, immediate delivery, conversion services, data management services and worldwide well log data sourcing. The TGS family of companies places a strong emphasis on providing high-quality data and the highest level of service to the industry. All statements in this press release other than statements of historical fact are forward-looking statements, which are subject to a number of risks, uncertainties and assumptions that are difficult to predict, and are based upon assumptions as to future events that may not prove accurate. These factors include TGS' reliance on a cyclical industry and principal customers, TGS' ability to continue to expand markets for licensing of data, and TGS' ability to acquire and process data products at costs commensurate with profitability. Actual results may differ materially from those expected or projected in the forward-looking statements. TGS undertakes no responsibility or obligation to update or alter forward-looking statements for any reason. TGS-NOPEC Geophysical Company ASA is listed on the Oslo Stock Exchange (OSLO:TGS).