TGS Nopec Geophys. : New TGS 3D Project in Liberia

ASKER, NORWAY (26 January, 2010) - TGS has commenced acquisition of the next
phase of 3D projectsoffshore Liberia
<http://www.tgsnopec.com/TGS_3D_Project_in_Liberia1.aspx>.  This newest project
covers Liberia blocks 8 and 9 and totals 5,000 kms(2).  The MV Polarcus Nadia
will acquire the project and TGS will apply advanced pre-stack time and
pre-stack depth imaging
<http://www.tgsnopec.com/geophysical/imaging-services.aspx> techniques to create
the final subsurface image.

The TGS African data library
<http://www.tgsnopec.com/europe-middleeast-africa.aspx> includes a series of 2D
and 3D seismic projects covering the Africa Transform Margin.  Recent petroleum
discoveries in the Gulf of Guinea and offshore Sierra Leone have attracted
significant exploration interest in this region. Upon completion of this latest
project, TGS will have more than 30,000 kms of 2D and 18,000 kms(2  )3D seismic
covering this emerging exploration play in West Africa.

The acquisition of the survey will complete in Q2 2010 and is heavily
prefunded.

TGS-NOPEC Geophysical Company (TGS) provides global geoscience data products and
services to the oil and gas industry for the exploration and delineation of
hydrocarbon reserves.  We design and acquire multi-client data projects
worldwide that make up our data library of seismic, gravity/magnetic and well
data, enhanced by our seismic imaging technology and regional interpretation
expertise.  Visit TGS online at www.tgsnopec.com <http://www.tgsnopec.com/>.

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).

For additional information about this news release please contact:

Karen El-Tawil
VP, Business Development
Tel: [phone]
Email:[e-mail] 

Arne Helland
Chief Financial Officer
Tel: [phone]
Email:[e-mail] 

Kim Abdallah
VP, New Ventures, Africa and Middle East
Tel: [phone]
Email:[e-mail] 

This information is subject of the disclosure requirements acc. to §5-12 vphl
(Norwegian Securities Trading Act)


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