A2D Technologies signs Nigeria well log marketing agreement

13 March 2006

Exclusive Arrangement Dramatically Expands Company's Global Footprint

Lagos, Nigeria (13 March, 2006) - Well log data provider A2D Technologies has completed an agreement with the Federal Republic of Nigeria, making it the sole reseller of data for the country's important on and offshore well log holdings. With this agreement, one of the world's leading hydrocarbon producers' log data assets will now be available via instant access over the Internet.

Under terms of the agreement with the Department of Petroleum Resources (DPR), A2D will provide services to collect, standardize and distribute high-quality log data from Nigeria. Data will be made available to the industry via A2D's online data library, LOG-LINE Plus!®. Together with its local partner TATNET Nigeria Ltd., A2D will work closely with the DPR to provide a competent network to ensure greater success in exploration activities across Nigeria.

"A2D's well log database is rapidly expanding beyond its initial U.S. collection to become the global well log data marketplace," commented Rod Starr, Executive Vice President of Global Business Development for A2D Technologies. "As is the case in many hydrocarbon rich regions of the world, Nigerian well log data is in high demand, yet largely inaccessible from the desktop. Our relationship with the Department of Petroleum Resources will quickly change that model."

"Greater access to well log data is very much in the interest of Nigeria and a strategic direction for the Department of Petroleum Resources as it improves the basis for successful exploration campaigns," stated A. O. Chukwueke, Director of Petroleum Resources for Nigeria. "We chose to enter this agreement with A2D based on their proven e-commerce marketplace and track record of providing the highest quality data products to the industry."

This agreement marks another significant milestone in A2D's global expansion of its well log data marketplace. With the addition of Nigeria, the company now offers online access to well log data across much of Africa; including the countries of Benin, Cameroon, Congo, Equatorial Guinea, Gabon, Madagascar, Sierra Leone and Togo.

A2D Technologies, a TGS-NOPEC Company, 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. TGS is a leading global provider of multi-client geoscientific data, associated products and services to the oil and gas industry. 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).