The name was shortly afterwards changed to Geophysical Company of Norway, most commonly referred to as Geco.

Geco was merged with the competing Norwegian geophysical company at that time, Statex (owned by Statoil and Kongsberg Våpenfabrikk) effective from January 1, 1978.

[1] Geco retained its identity and name, but extended its service portfolio and global market share from 1978.

This brought about a merger with Merlin Geophysical (Seismic Profilers), who had been purchased by Schlumberger a year earlier.

[2] In 2001, Geco-Prakla was joined with the Western Geophysical division of Baker Hughes in a joint venture named WesternGeco.