TGS Announces 3D Multi-Client Survey in Gulf of Mexico

TGS Announces 3D Multi-Client Survey in Gulf of Mexico 
HOUSTON, TX -- (Marketwire) -- 12/14/12 --  TGS commences a 3D
multi-client survey covering 7,000 km2 in the Central Gulf of Mexico. 
The survey, Amerigo 3D, is located in the eastern side of the Central
Gulf of Mexico through the Lloyd Ridge, Desoto Canyon and Atwater
Valley areas.  
"We are pleased to extend our 3D coverage in the Central Gulf of
Mexico. This survey enables TGS to leverage our existing adjacent 3D
data while utilizing 12,000 meter offsets to allow for a deeper image
in this attractive play. Industry support of the new survey indicates
increasing interest to explore in this region," commented Rod Starr,
Senior VP Western Hemisphere for TGS. 
The seismic data is being acquired by a Fugro C-class vessel and will
be complete Q2 2013. Data processing will integrate the new Amerigo
data with TGS' modern, adjacent 3D data and apply TGS' newest
broadband processing technology, Clari-Fi(TM). Preliminary data will
be available to clients Q3 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 
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
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 66 76 99 00
Cell: +47 47 60 33 34
Will Ashby 
Director Investor Relations and M&A
Office: +1 713 860 2184
Rod Starr
Senior VP Western Hemisphere
Tel: +1 713 860 2100
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