TGS Announces a New 3D Multi-client Survey in Northern North Sea

ASKER, NORWAY (5 July 2011) - TGS will commence acquisition of a new 3D multi-
client survey which covers 1,100 km(2) over the Magnus Basin, including the
southwest to northeast striking "End of the World" fault.  TGS will also
reprocess approximately 6,500 km(2) of 3D seismic data in the same area to build
a combined project of 7,600 km(2).

The new seismic data will be acquired by M/V Geo Pacific towing 8 x 6,000 m
streamers and be completed in Q3 2011.  Data processing from the new acquisition
and reprocessing will be performed by TGS and available to clients from late Q1
2012.  The survey is supported by industry funding.



Company summary

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.



Forward-looking statements and contact information

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 press release please contact:

Kristian Johansen
Chief Financial Officer
Office: +47 667 69931
Cell: +47 47 60 33 34
Email:kristian.johansen@tgsnopec.com

Karen El-Tawil
VP, Business Development
Office: +1 713 860 2102
Cell: +1 713 806 2420
Email:karen.el-tawil@tgsnopec.com

Kjell E. Trommestad
Senior VP Europe & Russia
Tel: +47 66 76 99 61
Email:kjell.trommestad@tgsnopec.com


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


[HUG#1528638]