LLOG ramps up US Gulf activity with second rig, Who Dat expansion plans

The operator is advancing multiple US Gulf projects, including the Who Dat East subsea tieback, the Kingsroad exploration well, production optimization work at the Who Dat field, and appraisal planning at Who Dat South.

Jeremy Beckman

Nov. 9, 2026

2 min read

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Why this news matters:

LLOG is pursuing a mix of near-term production growth and longer-term exploration opportunities, highlighting continued investment in the US Gulf despite industry capital discipline.
The remediation program and sidetrack wells could materially increase Who Dat production, while the planned Who Dat East tieback leverages existing infrastructure to develop additional reserves.
Multiple upcoming milestones, including Kingsroad, Salamanca FID, Who Dat South appraisal planning and Who Dat East construction, provide investors and industry observers with several catalysts to watch through 2028.

Who Dat operations in the US Gulf — Who Dat field facilities in the US Gulf are undergoing optimization and development activities as LLOG advances production growth, exploration drilling and future subsea expansion projects.

Harbour Energy subsidiary LLOG now has two drilling rigs in operation in the US Gulf, as the second rig arrived in September, according to Harbour’s latest operations update.

The Kingsroad exploration well is set to spud around year-end 2026.

LLOG and its partners approved the one-well Who Dat East subsea development in August, and the company also expects to take FID on the Salamanca floating production system (FPS) subsea pump project in the next few weeks.

Who Dat’s production performance has improved after the new A1 sidetrack (A1 ST) came online in July, allied to optimization measures on the floating production platform.

A second sidetrack, G1 ST, is due to spud shortly and expected to be completed in the second quarter of next year, said partner Karoon Energy in its own operations update.

LLOG, continues to advance a remediation plan for the two E risers and flowlines, with replacement activity taking place during the course of next year, and production restoration targeted at year-end 2027.

If successful, this should raise production from Who Dat by about 15,000 bbl/d of oil.

Oil and gas production from Who Dat East will head through a new 29-km pipeline to the Who Dat FPS, where it will be co-mingled, transported and processed through existing infrastructure.

LLOG has issued the installation contracts and detailed engineering has begun for the riser. The project should start up in the second half of 2028, at an initial rate of about 6,500 bbl/d of liquids and 50 MMcf/d of gas.

Finally, the partners are reviewing reprocessed seismic to determine the best location for an appraisal well at Who Dat South, likely to be drilled next year.

About the Author

Jeremy Beckman

Staff Writer / Editor, Europe

Jeremy Beckman has been Editor Europe, Offshore since 1992. Prior to joining Offshore he was a freelance journalist for eight years, working for a variety of electronics, computing and scientific journals in the UK. He regularly writes news columns on trends and events both in the NW Europe offshore region and globally. He also writes features on developments and technology in exploration and production.