Norwegian seismic player Shearwater has placed the lowest commercial offer in a Petrobras tender designed to hire a 4D survey covering a pair of deep-water fields in the Campos basin offshore Brazil.

The Brazilian oil giant intends to contract an exclusive 4D streamer seismic programme in order to acquire gravimetric data in the Tartaruga Verde and Southwest of Tartaruga Verde fields to assess changes in hydrocarbons reservoirs over time.