TGS imaging expands research and development program

01 February 2005

Houston, Texas (1 February, 2005) - TGS Imaging, the processing and imaging arm of TGS-NOPEC Geophysical Company ("TGS"), announced today that it is expanding its research and development efforts in data processing and software development. Leading this effort will be the company's new Vice President of R&D, Young Kim, Ph.D.

Dr. Kim, a twenty-four year veteran of geophysical research, will work closely with TGS' clients in developing advanced processing solutions. His leadership and experience will increase the capabilities of the TGS Imaging research group, credited with the original introduction of wave equation and tomography processing techniques.

Young Kim comes to TGS Imaging from ExxonMobil Exploration where he was a technical advisor on special projects for subsurface depth imaging. Previously Dr. Kim was the Research Supervisor for the Seismic Processing Research Section at ExxonMobil Upstream Research. Dr. Kim holds three patents related to seismic processing technology and has contributed to more than 20 published articles.

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).

John Adamick
Senior VP, Geological Products and Services
Tel: +1 713 860 2100