Repurchase of Shares

ASKER, NORWAY (8 aug 2011) - TGS-NOPEC Geophysical
Company ASA ("TGS") has on Monday 8 August purchased
110,000 own shares at an average price of NOK 113.74
per share. Following the purchase, TGS holds
2,213,701 own shares, representing 2.13% of the
outstanding number of shares. The transaction is part
of the share buyback program announced by TGS on 5
May 2011. The buyback program includes a repurchase
of up to USD 30 million of TGS shares during 2011.

TGS-NOPEC Geophysical Company (TGS) provides multi-
client geoscience data and services to oil and gas
Exploration and Production companies around the
globe. TGS' geophysical and geological data products
include multi-client seismic libraries, permanent
reservoir monitoring, magnetic and gravity data, the
industry's largest global database of digital well
logs and regional interpretive products. TGS also
provides high-end depth imaging services to help
resolve complex seismic imaging problems. For more
information visit TGS online at www.tgsnopec.com.
TGS-NOPEC Geophysical Company ASA is listed on the
Oslo Stock Exchange (OSLO:TGS).
For additional information about this news release
please contact:
Kristian Johansen Chief Financial Officer Office: +47
667 69931 Cell: +47 47 60 33 34 Email:
kristian.johansen@tgsnopec.com
Karen El-Tawil VP, Business Development Office: +1
713 860 2102 Cell: +1 713 806 2420 Email: karen.el-
tawil@tgsnopec.