Acquisition
Leadership in seismic acquisition technology
PGS is universally known for many innovations in 3D seismic acquisition, having led the world since the Nordic Explorer became the first seismic vessel to tow 5 streamers in 1993. PGS has established most streamer towing and handling record since, and is currently the only seismic company capable of towing more than 12 full length streamers. The record stands at 16 streamers, set back in 2001. At the heart of PGS' unmatched efficiency lies the Ramform vessel design, unquestionably the most innovative and recognisable seismic vessel in the world. The Ramform's massive delta-shaped hull enables 20 streamer reels to be safely distributed across the back deck, supported by advanced streamer handling and towing systems. This design enables PGS to stand out alone in the High-Density 3D (HD3D) acquisition market, being the only company capable of towing large numbers of streamers at very close separations. HD3D provides optimum seismic resolution and quality product, supported by the largest efficiencies and capabilities in the world. As of 2004, the following HD3D performance records have no parallels:
10 x 6000 meter streamers at 37.5 meter streamer separation
12 x 6000 meter streamers at 50.0 meter streamer separation
14 x 4500 meter streamers at 37.5 meter streamer separation
16 x 4500 meter streamers at 50.0 meter streamer separation
These records are routinely equalled, month after month.
Technology independence and innovation
Part of the Ramform concept is safety by design. Engineering intrinsically safe systems is the first step in managing HSE exposure. PGS are justifiably proud of their HSE history and performance to date, whilst continously striving for further improvement. An example of the Ramform safety by design is the placement of the workboat launch site at the stern of the vessel, where there is protection from the elements.
Naturally, there is the actual shape of the hull, which is uniquely suited for towing many seismic streamers. The Ramform hull provides a large, stable working platform allowing many streamer reels to be be placed where we want them. Efficient streamer handling has been built into the Ramform design making it possible to manage deployment, recovery and maintanance with more ease, and with far less cost and lost production.
Besides the basic Ramform hull design, several engineering technologies contribute to the operational success of PGS. Many of these innovations apply equally to our conventional fleet, and are not confined to the Ramform vessels. PGS continues to pursue and develop innovations ahead of the competition, significantly reducing investment costs in third-party hardware, and continuing to drive the efficiencies of the fleet.
Many examples of engineering innovations developed within PGS relate to the towing systems, the gAS-VIPER recording and QC system, and the streamer manufacturing itself. None of these technologies is off the shelf! Each of these are products developed by PGS in conjunction with its suppliers to maintain the unique efficiencies that PGS is known for. Without these innovations, PGS would not have turned the HD3D product from a logistically-challenging dream into the efficient solution to exploration and production challenges that it is today.
Streamer acquisition innovations
PGS believes that the future of exploration and production seismic lies with HD3D seismic to improve reservoir resolution and characterization, complemented by time lapse ("4D") surveys focused upon specific reservoirs.
The future
PGS designs and builds leading technologies for all acquisition operations in all water depths and all environments, continually seeking innovations in efficiency, flexibility, and safety.
PGS will continue to unveil new innovations and directions for the seismic industry.
