PGS claims seismic spread record

Norway-based geoscience firm PGS has laid claim to the industry's largest seismic spread, offshore Myanmar.

The firm says its vessel, the Ramform Titan, working in the Bay of Bengal, is towing the industry’s first ever single vessel 18 streamer seismic operation. Over a mile across, this is the widest deployment on record, says the firm.

PGS was contracted earlier this year to acquire 3D seismic data offshore Myanmar by BG Group and Woodside Energy in the Rakhine basin, including the Bay of Bengal, off the western coast of Myanmar, starting 23 November. 

The Ramform Titan seismic spread is 18 streamers, each 7.05km-long, with 100m separation between the streamers. This makes a total spread width of 1.7km and represents close to 127km of streamers.

If tied together end to end, this would reach from New York City to Philadelphia.  The total surface area of the streamer spread is 15.6sq km.

Although the Ramform Titan class is built to tow 24 streamers, this is the first time PGS has deployed 18. "The ultra-large streamer count and 100m streamer separations employed on this project offshore Myanmar offer significant geophysical and project efficiency advantages," says PGS.

"The ultra-powerful and stable design of the Ramform Titan is able to deliver significantly higher acquisition efficiency with no compromise on data resolution. Whereas previous high streamer counts were achieved with wide tow configurations, this 18 x 100m tow would be impossible on a conventional seismic vessel. Managing such a vast array of complex in-sea electronics in the reality of the ocean represents an extreme degree of operational skill."

The project has notched up the highest ever daily production for a single seismic vessel so far achieved, with more than 160sq km, claims PGS. 

Read more

BG Group, Woodside start seismic offshore Myanmar 

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