Allstream Insiders Summary
SLB OneSubsea has secured an engineering, procurement and construction contract from bp to deliver a subsea boosting system for the Thunder Horse project in the deepwater Gulf of America. The contracted scope includes the boosting system and associated project management, engineering, manufacturing and testing.
bp and Thunder Horse co-owner ExxonMobil previously reached final investment decision on the subsea-pump project. bp expects the system to:
- Deliver first oil in 2028.
- Add approximately 15,000 barrels of oil equivalent per day of peak gross annual average production.
- Reduce pressure across existing wells to help increase flow and recovery.
- Provide a production contribution that bp has compared with drilling as many as two additional wells.
- Support continued production from the existing Thunder Horse development.
The contract value was not disclosed. SLB OneSubsea also did not identify the system’s detailed equipment configuration, manufacturing locations, delivery schedule, offshore installation contractor or separate supplier packages.
The 15,000-boe/d figure is bp’s expected production contribution from the project. It is not a current production rate or a capacity rating supplied by SLB OneSubsea.
Thunder Horse Subsea Boosting Project Tracker
| Project item | Company-reported detail |
|---|---|
| Operator | bp |
| Co-owner | ExxonMobil |
| Ownership | bp 75%; ExxonMobil 25% |
| Project | Thunder Horse subsea boosting system |
| Location | Mississippi Canyon area, deepwater Gulf of America |
| Project stage | Final investment decision reached; EPC contract awarded |
| EPC contractor | SLB OneSubsea |
| Contracted scope | Subsea boosting system, project management, engineering, manufacturing and testing |
| Expected startup | First oil targeted for 2028, according to bp |
| Expected production contribution | Approximately 15,000 boe/d of peak gross annual average production |
| Host facility | Existing Thunder Horse platform |
| Contract value | Not disclosed |
What Did bp Award to SLB OneSubsea?
bp awarded SLB OneSubsea an EPC contract for a subsea boosting system that will serve the existing Thunder Horse development. SLB OneSubsea’s stated execution responsibilities include project management, engineering, manufacturing and testing in addition to delivery of the system.
SLB did not include offshore installation or commissioning in its published description of the Thunder Horse EPC scope. It also did not identify a marine contractor, installation vessel, umbilical package, topside-modification package or fabrication site. Those elements should not be attributed to the contractor unless a later announcement confirms them.
SLB OneSubsea is a joint venture backed by SLB, Aker Solutions and Subsea7. The Thunder Horse award follows subsea boosting contracts for bp’s Kaskida and Tiber developments.
How Much Production Could the Thunder Horse Pump Add?
bp expects the subsea-pump project to add approximately 15,000 boe/d of peak gross annual average production after startup in 2028. bp has compared the expected contribution with production from as many as two new wells.
That comparison does not mean the pump is a pair of wells or that the project adds 15,000 boe/d immediately. The figure is a forward-looking estimate for peak gross annual average production after startup.
The subsea system is intended to lower pressure at existing wellheads. Lower wellhead pressure can increase reservoir drawdown, helping fluids move through the existing subsea network and toward the host platform. The project therefore seeks additional recovery through subsea processing rather than through the drilling scope of a conventional two-well development.
Why Is bp Using a Standardized Boosting System?
Thunder Horse will use the same supplier-led, standardized subsea boosting-system approach selected for bp’s Kaskida and Tiber developments. SLB OneSubsea said standardization can improve execution efficiency and shorten delivery timelines by using a common system solution across multiple projects.
Thunder Horse is a producing brownfield development, while Kaskida and Tiber are separate deepwater projects. The common technology approach does not make their field configurations, pressures, schedules or total project scopes identical.
SLB OneSubsea’s Thunder Horse announcement confirms a standardized system strategy but does not list the number of pumps, pressure rating, power requirement, control architecture or subsea layout selected for the project.
How Does the Project Fit the Existing Thunder Horse Development?
The boosting system is designed to add production through existing Thunder Horse wells and infrastructure. Thunder Horse began production in 2008 and operates in more than 6,000 feet of water in the Mississippi Canyon area.
Published project information identifies gross platform capacity of approximately:
- 250,000 barrels of oil per day.
- 200 million cubic feet of natural gas per day.
Those figures describe the host platform’s processing capacity. They are not the platform’s current production rate and should not be added to the project’s expected 15,000-boe/d contribution.
bp operates Thunder Horse with a 75% working interest. ExxonMobil holds the remaining 25%.
What Is Confirmed for the Offshore Supply Chain?
The confirmed commercial award is the EPC contract held by SLB OneSubsea. The published scope provides visibility into system delivery, engineering, manufacturing, testing and project-management work, but it does not identify separate open bid packages.
Based on the announced technology, execution could involve equipment and services associated with subsea pumping, controls, electrical systems, flow assurance, testing, offshore logistics, installation support and integration with the existing host. These are conditional Allstream observations about the project configuration—not separate contract awards or currently available solicitations.
The announcement does not disclose:
- EPC contract value.
- Named component suppliers or subcontractors.
- Fabrication or assembly locations.
- Long-lead equipment awards.
- Offshore installation scope or vessel selection.
- Umbilical, flowline or topside-modification details.
- A procurement or delivery timetable.
Contractors and suppliers should monitor future disclosures from bp, SLB OneSubsea and any subsequently identified installation or integration contractors before treating those categories as available work.
Allstream Perspective
The Thunder Horse project shows how bp is using subsea processing to pursue additional production from an existing deepwater asset while applying a common equipment strategy across multiple Gulf projects. For the offshore supply chain, the confirmed opportunity is meaningful but defined: SLB OneSubsea holds the EPC award for the boosting system and related execution services.
The project may provide additional visibility for subsea-equipment manufacturing, system testing and integration as it advances toward the 2028 startup target. However, the public announcement does not identify which supporting packages will remain within SLB OneSubsea, which may be subcontracted or whether any further awards will be announced.
The next useful project disclosures will be equipment configuration, manufacturing milestones, delivery timing, offshore installation responsibility and integration work at the Thunder Horse host. Until then, the 15,000-boe/d estimate should be presented as bp’s expected peak gross annual average contribution—not as guaranteed production.
