Liberia Well Log Data Now Available Online -- A2D Technologies' LOG-LINE Plus! to be the Exclusive Distribution Point

The National Oil Company of Liberia (NOCAL) has entered
into a strategic arrangement with A2D Technologies to make its well
log data assets available online. The data is accessible via LOG-LINE
Plus!(R), the Company's web-based tool for locating and downloading
well log data.
"The addition of these logs from Liberia expands upon what is
already the premiere collection of well log data in West Africa," said
Rod Starr, Executive Vice President Global Business Development for
A2D Technologies. "We are pleased to be working with NOCAL in the
promotion of this data."
"With this agreement, we seek to highlight the potential that
Liberia holds for oil and gas exploration," said Dr. Fodee Kromah,
President and CEO of NOCAL. "We chose A2D for this project based on
their experience, leadership in the well log data sector and the
quality of their work."
In 2002 a geological and geophysical evaluation of offshore
Liberia was completed using 2D data acquired by A2D's parent company,
TGS-NOPEC Geophysical.
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).