TGS Q3 2013 Update and Revised Full-year Revenue Guidance

ASKER, NORWAY (8 October 2013) - Based on a review of the investment plans for
the remainder of the year, TGS expects total investments for 2013 of between USD
400 - 440 million with a pre-funding ratio near the lower end of the previously
guided range of 40% - 50%. As a result of the revised investment plan, net
revenues for 2013 are expected to be USD 810 - 870 million.

Investments in Q3 were USD 112 million with an average prefunding of 39%. Net
revenues in Q3 are expected to be USD 191 million, reflecting continued strong
demand for the existing TGS data library.

"We continue to experience delays as we wait for permits to acquire new surveys.
Further, we remain very focused on quality. This focus has resulted in TGS
passing up or postponing a number of low prefunded projects where the risk of
achieving the required return is too high. Our late sales, however, continue to
be strong, reinforcing the value of TGS' global data library", says TGS' CEO
Robert Hobbs.

TGS will report the Q3 2013 earnings on 23 October.

This information is subject of the disclosure requirements pursuant to section
5-12 of the Norwegian Securities Trading Act.


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