TGS deploys denser node grid for US Gulf OBN survey

The ultra-long offset survey, due to conclude by mid-year, involves a novel combination of multiple technologies to improve surface imaging and velocity accuracy.
Related To: 
Jan. 16, 2026
Courtesy TGS
APEX 1 OBN survey map

Node deployment for APEX 1 started in December 2025, and acquisition is expected to be completed in late second-quarter 2026.

TGS is acquiring a multi-client long-offset ocean-bottom node (OBN) survey in the US Gulf of Mexico.

The APEX 1 project, which started last month, should be completed in late June, with early processing results expected this summer.

It involves a standalone deployment of a denser node grid, using the company’s Gemini enhanced frequency source, without dependence on underlying streamer seismic coverage, and Dynamic Matching FWI (DM-FWI).

By combining dense node spacing, ultra-long offsets and advanced imaging workflows, TGS expects to deliver improved subsurface resolution, velocity accuracy, and overall confidence for exploration and appraisal in the area covered.

The approach could be extended to other offshore basins globally, the company added.

Exclusive content:

Courtesy Sonardyne
Trials of the OD OBN technology
A new system allows seabed nodes to remain operational for years, enabling on-demand seismic data collection without repeated deployment or retrieval.
Jan. 15, 2026
Courtesy TGS
Amendment 4 Gulf of America survey vessel
Modern long-offset ocean-bottom node (OBN) surveys, combined with enhanced frequency sources and advanced imaging, are setting a new benchmark for complex salt exploration in ...
Jan. 15, 2026
Sign up for our eNewsletters
Get the latest news and updates

Related

Importance of FSRUs for a dynamic LNG market
Deepest US Gulf well to date and frontier Libya carbonates test among Westwood’s latest high-impact drilling line-up