2012-11-27 08:19:31 -

ASKER, NORWAY (27 November 2012) - TGS has commenced an extension to the
offshore Angola 3D multi-client survey.  The extension, covering 4,064 km(2)
over blocks 36 and 37, will add to the original survey of 12,500 km(2) which has
completed acquisition.

"We are very pleased to continue our relationship with Sonangol and to support
oil and gas exploration in the Republic of Angola," commented Stein Ove Isaksen,
Senior VP Eastern Hemisphere for TGS.  "Angola's conjugate margin pre-salt
basins, similar to hydrocarbon rich basins offshore Brazil, provide exciting new
opportunities in petroleum exploration."

The seismic data is being acquired by the M/V Geco Eagle.  Data processing will
be performed by TGS and preliminary data will be available to clients from Q4
2013.

The survey is supported by industry funding.




Company summary

TGS-NOPEC Geophysical Company (TGS) provides   multi-client geoscience data to oil
and gas Exploration and Production companies worldwide.  In addition to
extensive global geophysical and geological data libraries that include multi-
client seismic data, magnetic and gravity data, digital well logs, production
data and directional surveys, TGS also offers advanced processing and imaging
services, interpretation products, permanent reservoir monitoring and data
integration solutions.

For more information visit TGS online at www.tgs.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
Cell: +47 47 60 33 34
Email: kristian.johansen@tgs.com

Will Ashby
Director Investor Relations and M&A
Office: +1 713 860 2184
Email: will.ashby@tgs.com

Stein Ove Isaksen
Senior VP Eastern Hemisphere
Office: +47 41 64 00 74
Email: steinove.iskasen@tgs.com

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




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     originality of the information contained therein. 
    
Source: TGS via Thomson Reuters ONE
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