TGS Commences Extension to Offshore Angola 3D Multi-Client

TGS Commences Extension to Offshore Angola 3D Multi-Client Survey 
ASKER, NORWAY -- (Marketwire) -- 11/27/12 --  TGS has commenced an
extension to the offshore Angola 3D multi-client survey. The
extension, covering 4,064 km2 over blocks 36 and 37, will add to the
original survey of 12,500 km2 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 
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
Cell: +47 47 60 33 34
Will Ashby
Director Investor Relations and M&A 
Office: +1 713 860 2184
Stein Ove Isaksen 
Senior VP Eastern Hemisphere
Office: +47 41 64 00 74
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