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Subsea 7 Deploys 3D at Depth SL1 Technology

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Oilfield Technology,

Subsea 7 LLC and 3D at Depth, a global technology provider of advanced subsea LiDAR systems and solutions, have announced the completion of several metrology projects using subsea LiDAR technology. These projects use subsea LiDAR technology in new configurations, which aim to help increase overall efficiencies in offshore oil and gas applications.

Subsea 7's Gulf of Mexico project is considered to be the world's first in tandem metrology, deploying LiDAR sensor technology on dual remotely operated vehicles (ROVs) for simultaneous scans. The project reduced the timeline to first oil.

Subsea 7's project stationed two 3D at Depth SL1 systems independently to collect simultaneous metrologies using separate ROVs. The survey conducted in the Mississippi Basin completed a total of six spool metrologies. Data was processed on board and issued 5 hours post-metrology completion. The ranges achieved by 3D at Depth's sensor technology allowed for a single set up and scan over a 220° degree arc, collecting repeatable measurement data with a transmit and receiving beam steerable to the areas of interest.

Conventional long baseline positioning (LBL) methods would have required longer timeframes in terms of configuration and data set delivery schedules. The in tandem configuration, along with onsite topside access to data, resulted in significant cost savings in terms of vessel time and schedule, and facilitated a reduced time to first oil.

"Successful implementations, substantiate the flexibility of LiDAR scanning technology for broader use in the offshore industry," said 3D at Depth Subsea LiDAR Specialist, Derek Perce. "3D at Depth will continue to provide our customers with innovations to LiDAR technology that demonstrate performance and increase the efficiencies of data collection, mapping and visualisation."

Edited from press release by

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