TGS : TGS Q1 2013 Webcast and Teleconference

                 TGS : TGS Q1 2013 Webcast and Teleconference

ASKER, NORWAY (18 April 2013) - TGS will publish its Q1 2013 results at
approximately 08:00 Central European time on 25 April 2013. At the same time,
a recorded presentation with audio by CEO Robert Hobbs and CFO Kristian
Johansen will be made available at www.tgs.com.

The slides from the presentation will also be available in PDF format at both
the TGS and Oslo Stock Exchange websites.

CEO Robert Hobbs and CFO Kristian Johansen will host a conference call on 25
April 2013 at 15:00 CET (9:00 AM New York time). Attendees may want to call
5-10 minutes before 15:00 CET (9:00 AM NY) to ensure registration and access.

  oNorwegian attendees are invited to call +800 56054 or +47 2316 2771
  oInternational attendees are invited to call 0800 279 5004 or +44 (0)20
    7136 2056
  oUS attendees are invited to call +1 877 280 1254

Participants will need to quote the following confirmation code when dialing
into the conference: 5452624.

A Q&A session will follow a short introduction, based upon the presentation
issued in the morning. To pose a question, please press *1.

A replay of the conference call will be available shortly after. To access
replay of the TGS conference call,

  odial +47 2100 0498 (Norway) or +44 (0)20 3427 0598 (International) or +1
    347 366 9565 (US)
  oreplay access code 5452624 followed by # (pound-sign)

A replay of the conference call will also be available at www.tgs.com.

Company summary

TGS-NOPECGeophysical 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 visitTGS online atwww.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
Tel: +47 47 60 33 34

Email: kristian.johansen@tgs.com

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

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

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Source: TGS via Thomson Reuters ONE
HUG#1693943
 
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