SUCCESS OFFSHORE IS BUILT ON CONTINUOUS CONSULTATION AND
INNOVATION. WE APPLY THESE PRINCIPLES TO DELIVER THE VESSELS
AND SOLUTIONS THAT OUR CLIENTS NEED.
FACING THE FUTURE TOGETHER
OFFSHORE CARRIER 8500
GEOLOGY & GEOPHYSICS
ration and production budgets are utilized,
ensuring maximum value is extracted from
every dollar spent.
PGS has invested in multi-client EM data in
the Barents Sea for the last three years, assisting major oil companies in their bidding and
drilling decisions by providing the aforementioned advantage not available to those with
seismic data alone. This investment is not
only to the benefit of industry, but also those
responsible for regulation, permitting, and resource management on a national scale.
There is another aspect of complementar-ity over and above seismic and resistivity integration: simultaneous acquisition of towed
streamer EM and 2D GeoStreamer broadband
seismic, as is shown in the related schematic.
In addition to offering an integrated simultaneous acquisition
of CSEM and seismic data, an EM-only acquisition service is also
available. Given that, to extract maximum value from resistivity data
it should be interpreted with seismic and other geophysical information. This EM-only acquisition is employed in areas of existing
seismic, usually 3D. During the 2014 EM campaign in the Barents
Sea, a record acquisition rate of more than 200 sq km ( 77 sq mi) in
24 hours was set by the crew. These high rates of acquisition were
enabled by towing the EM streamer at 4-5 knots and acquiring full
high-density 3D CSEM data with a 1 km (0.6 mi) sail line spacing.
The standard EM streamer is 8,700 m ( 28,543 ft) long with an 800
m ( 2,624 ft) EM source. The equipment is configurable; it can be extended to 10,000 m and 1,200 m ( 32,808 ft and 3,937 ft), respectively,
in the event that deeper subsurface imaging is the priority. Con-
This rendering shows the operating configuration when acquiring towed streamer EM and 2D
broadband marine seismic data simultaneously.