Scarborough Energy Project: Why Woodside’s $12.5bn LNG development matters in 2026

The Scarborough Energy Project has reached the stage where a gas discovery made in 1979 is approaching commercial production after decades of technical studies, changing ownership structures and development planning. Woodside Energy Group reported that the Scarborough offshore development and Pluto Train 2 were 96% complete at the end of March 2026, excluding the separate Pluto Train 1 modification works. The company said both components remained on budget and on track for first liquefied natural gas cargo in the fourth quarter of 2026.

That timetable makes Scarborough one of the most important LNG start-up projects in the Asia-Pacific region during 2026. The development connects a large deepwater gas resource in the Carnarvon Basin with expanded processing capacity at the Pluto LNG complex near Karratha in Western Australia. Once fully operational, Scarborough is designed to support peak LNG production of up to 8 million tonnes per annum and domestic gas capacity of as much as 225 terajoules per day.

The project is also strategically important because it extends the productive relevance of Woodside Energy Group’s existing Pluto LNG infrastructure. Approximately 5 million tonnes per annum of Scarborough gas is expected to be processed through the new Pluto Train 2, while up to 3 million tonnes per annum can be processed through the modified Pluto Train 1 when capacity becomes available.

This integrated development model allows Woodside Energy Group and its partners to combine a new offshore production system with both new and existing onshore liquefaction infrastructure. It also gives the project access to established LNG storage, loading, shipping and customer networks rather than requiring an entirely separate export complex.

Where is the Scarborough gas field and when was the resource discovered?

The Scarborough gas field is located in the Carnarvon Basin, approximately 375 kilometres off the Pilbara coast of Western Australia. The offshore development includes subsea wells tied back to a semi-submersible floating production unit positioned in deep water near the field.

Scarborough was discovered in 1979 through the Scarborough-1 exploration well. However, discovery did not lead to immediate development. The field’s distance from shore, deepwater location, development cost and need for a viable LNG processing route meant that several possible commercialisation concepts were evaluated over the following decades.

The eventual development concept connects Scarborough with Pluto LNG through an offshore export pipeline of approximately 433 kilometres. This route gives the resource access to existing LNG infrastructure while supporting the construction of Pluto Train 2 and modifications to Pluto Train 1.

The long period between discovery and first production illustrates a central feature of large offshore gas developments. A technically successful discovery does not automatically become a commercial project. Scarborough required sufficient resource confidence, an economically viable floating production design, a long-distance pipeline, access to LNG processing capacity, environmental approvals and enough market demand to support a multibillion-dollar investment.

Who owns and operates the Scarborough Energy Project in 2026?

Woodside Energy Group operates the Scarborough Joint Venture and holds a 74.9% participating interest. JERA Scarborough Pty Ltd holds 15.1%, while LNG Japan’s investment vehicle holds the remaining 10%.

The ownership structure changed significantly during 2024 when Woodside Energy Group completed sell-down transactions with two Japanese investors. These transactions reduced Woodside Energy Group’s exposure to the project while bringing in strategic participants with direct interests in long-term LNG supply.

JERA completed the acquisition of its 15.1% interest for estimated total consideration of approximately US$1.4 billion. That amount included the purchase price and reimbursement of JERA’s share of expenditure incurred before transaction completion. The interest gives JERA access to an equity share of approximately 1.2 million tonnes of LNG annually at peak project production.

LNG Japan acquired a 10% participating interest through LJ Scarborough Pty Ltd. LNG Japan is owned by Sumitomo Corporation and Sojitz Corporation, while the Japan Organization for Metals and Energy Security also participates in the project investment structure. LJ Scarborough’s equity entitlement is up to approximately 0.8 million tonnes of LNG annually.

The ownership of Pluto Train 2 is different from that of the offshore Scarborough Joint Venture. Woodside Energy Group operates Pluto Train 2 with a 51% interest, while Global Infrastructure Partners holds 49%. This means the companies that own the offshore gas resource are not identical to those that own the new liquefaction train processing most of the gas.

The structure gives Woodside Energy Group control over both the upstream project and the LNG processing development while sharing capital requirements with infrastructure and strategic energy investors. It also creates a direct link between project ownership and Japanese LNG procurement priorities.

What is the LNG production and domestic gas capacity of Scarborough?

The Scarborough Energy Project is designed to support peak LNG production of up to 8 million tonnes per annum. Approximately 5 million tonnes per annum will be processed through Pluto Train 2, with up to another 3 million tonnes per annum expected to be processed through the existing Pluto Train 1 after modification.

The offshore development initially includes eight high-rate gas wells connected to the floating production unit. Woodside Energy Group plans to drill 13 wells over the operating life of the Scarborough field.

By early 2026, drilling of the initial eight development wells had been completed. Woodside Energy Group reported that reservoir quality and expected well deliverability were consistent with its pre-drill assumptions. This is a positive development because well performance will determine how efficiently the field can supply both Pluto LNG trains during production ramp-up.

Scarborough will also support additional domestic gas capacity for Western Australia. The expanded Pluto LNG facilities are designed to provide as much as 225 terajoules of domestic gas capacity per day.

That figure represents processing and supply capacity rather than guaranteed daily delivery. Actual domestic gas volumes will depend on contracts, demand, plant availability and the allocation of Scarborough gas between LNG production and the Western Australian market.

The domestic gas component has become increasingly important as Western Australia assesses future supply needs, the decline of mature gas fields and growing demand from mining, industrial and electricity-generation customers.

How will Scarborough gas reach Pluto LNG and overseas customers?

Gas produced from Scarborough’s subsea wells will flow through offshore infrastructure to a semi-submersible floating production unit. The facility will process, dehydrate and compress the gas before sending it through the export trunkline to the Burrup Peninsula.

The floating production unit reached the Scarborough field and was moored before the end of the first quarter of 2026. Woodside Energy Group subsequently completed the connection of the umbilical and all subsea risers, allowing topsides commissioning to progress.

The FPU is central to the development because it performs the initial offshore processing required before the gas enters the export pipeline. It also provides the interface between the subsea wells and the approximately 433-kilometre connection to Pluto LNG.

At the Burrup Peninsula, Scarborough gas will enter the expanded Pluto LNG complex. Most of the initial gas will be processed through Pluto Train 2, while Pluto Train 1 modifications are intended to allow the existing train to process additional Scarborough volumes.

Once liquefied, the LNG will be stored and loaded onto specialised carriers for shipment to export customers. The project’s Japanese equity partners create a clear commercial connection with one of the world’s largest and most established LNG-importing markets.

The project also includes an integrated remote operations centre at Woodside Energy Group’s headquarters in Perth. This infrastructure is intended to support remote operation and monitoring of both the Scarborough offshore facilities and the Pluto LNG complex.

How did Scarborough reach final investment decision and why did its cost rise?

Woodside Energy Group and its project partners approved the integrated Scarborough Energy Project in November 2021. The investment decision covered the offshore Scarborough field development, Pluto Train 2 and modifications required to process Scarborough gas through Pluto Train 1.

The project was approved with an estimated total cost of US$12 billion. Woodside Energy Group later conducted a cost and schedule review and increased the estimate by 4% to US$12.5 billion in July 2024. The company attributed a significant part of the increase to the maturation of the Pluto Train 1 modification scope.

Woodside Energy Group’s share of the revised project estimate was approximately US$8.2 billion at the time of the 2024 update, based on its interests in the offshore joint venture and Pluto Train 2.

The revised US$12.5 billion figure is now the relevant cost baseline. Woodside Energy Group’s 2026 reporting says Scarborough and Pluto Train 2 remain on budget against that revised estimate.

The cost change should therefore be described accurately as a formal 4% increase from the final investment decision estimate, rather than dismissed as a change in project description. At the same time, there is no current evidence in Woodside Energy Group’s reporting of a further material increase beyond the revised baseline.

Construction of Pluto Train 2 began after the final investment decision, with Bechtel using a modular execution strategy. Large process modules were fabricated in Batam, Indonesia, and transported to Karratha for installation.

By December 2024, all 51 modules for Pluto Train 2 had arrived at the project site. The modules had a combined weight of approximately 56,000 tonnes, illustrating the scale of the onshore construction programme.

Which companies won the major Scarborough Energy Project contracts?

McDermott International was awarded the engineering, procurement, construction, installation and commissioning contract for the Scarborough floating production unit. The scope followed earlier front-end engineering and design work carried out by the company.

McDermott International’s responsibilities included the engineering, fabrication, integration, transportation and offshore installation of the FPU. The contractor completed the floatover integration of the topsides and hull in May 2025, bringing together the project’s principal offshore processing structures.

Saipem was awarded the contract covering coating, transportation and installation of the Scarborough export trunkline. The pipeline connects the floating production unit with the Pluto LNG facilities and is therefore one of the most important links in the project’s production chain.

The trunkline must transport every unit of Scarborough gas from the offshore production facilities to the onshore LNG plant. Its installation was a major project milestone because the offshore field cannot be commercialised without a reliable connection to Pluto LNG.

Bechtel is responsible for the engineering, procurement, construction and commissioning of Pluto Train 2. Its scope includes the new LNG processing train, additional domestic gas infrastructure, supporting utilities and associated facilities.

The modular strategy used for Pluto Train 2 allowed major construction work to proceed in Indonesia before the modules were transported to Western Australia. This approach reduced some site-construction requirements but created a demanding logistics and integration programme.

A broader supply chain of drilling contractors, subsea suppliers, fabrication yards, transport providers and regional businesses has also participated in the project. Woodside Energy Group has reported substantial procurement and project expenditure within Western Australia and the Pilbara region.

What are the latest Scarborough Energy Project developments in 2026?

The project’s most important 2026 development is its transition from construction toward commissioning and start-up. At the end of March, Scarborough and Pluto Train 2 were 96% complete, excluding Pluto Train 1 modifications.

The offshore FPU had been moored at the Scarborough field, and the umbilical and all subsea risers had been connected. Topsides commissioning was under way, moving the offshore facility closer to receiving gas from the initial wells.

At Pluto Train 2, the additional gas turbine generator achieved first ignition. Project teams were also preparing for the first run of the liquefaction compressors, a major commissioning step because those compressors are essential to the LNG production process.

The first two of three modules built for the Pluto Train 1 modification programme had arrived at the Pluto site after fabrication in Thailand. Woodside Energy Group said in its April 2026 quarterly report that civil, structural and piping work was advancing in preparation for activities scheduled during a major Pluto Train 1 turnaround in May 2026.

A subsequent official Woodside Energy Group update confirming completion of that turnaround was not available at the time of publication. The May event should therefore be described as the company’s published schedule, not as a confirmed completed milestone.

The official target remains first LNG cargo in the fourth quarter of 2026. Reaching that milestone will require the offshore production system, export pipeline, Pluto Train 2 and associated utilities to operate together during the final commissioning sequence.

What environmental approvals and emissions conditions apply to Scarborough?

Scarborough has passed through multiple layers of offshore and onshore regulatory assessment. The National Offshore Petroleum Safety and Environmental Management Authority accepted the Scarborough offshore project proposal in 2020, subject to further activity-specific approvals.

Separate environment plans have covered development drilling, subsea construction, seismic activity, pipeline installation and operation of the offshore facility and trunkline. The Scarborough Offshore Facility and Trunkline Operations Environment Plan was accepted on February 19, 2025.

The operating plan covers the FPU, associated subsea infrastructure and the Commonwealth-waters portion of the export pipeline. Regulatory acceptance allows the planned activities to proceed subject to the conditions, environmental controls and ongoing compliance requirements contained in the plan.

The project has faced scrutiny over marine impacts, consultation, underwater noise, greenhouse gas emissions and its consistency with climate objectives. These issues have resulted in detailed environmental assessment and, in some cases, revised plans and additional consultation.

Woodside Energy Group says the Scarborough reservoir contains less than 0.1% carbon dioxide. Low reservoir carbon dioxide reduces the amount of naturally occurring carbon dioxide that must be removed from the gas during offshore and LNG processing.

That characteristic does not eliminate emissions from the project. Operational emissions will still arise from offshore processing, pipeline compression, LNG production and shipping, while significantly larger emissions will occur when customers eventually use the gas.

The approved Pluto LNG greenhouse gas abatement pathway contains progressively tighter reduction or abatement targets for covered facility emissions. The targets include 30% by 2030, 35% by 2035, 40% by 2040, 65% by 2045 and 100% reduction or abatement by 2050.

The wording is important because the programme allows emissions to be reduced or abated. It should not be interpreted as a guarantee that every physical emission from the operating facility will be eliminated by 2050.

How will Scarborough affect Woodside Energy Group’s earnings and investor sentiment?

Scarborough is expected to become an important source of production, LNG sales and cash flow for Woodside Energy Group. Successful start-up would increase utilisation of the Pluto LNG complex and add long-life gas production to the company’s portfolio.

The project also demonstrates Woodside Energy Group’s strategy of sharing capital with infrastructure and strategic partners while retaining operatorship. The participation of JERA, LNG Japan and Global Infrastructure Partners has reduced Woodside Energy Group’s direct capital exposure and connected the project with long-term Asian energy demand.

Woodside Energy Group’s New York-listed shares closed at approximately US$18.94 on June 26, 2026. Investor sentiment toward the company depends on more than Scarborough, including LNG and oil prices, shareholder returns, Louisiana LNG spending, the Trion project and operating performance across the wider portfolio.

Scarborough nevertheless remains a major near-term execution catalyst. Delivering first LNG in the fourth quarter would support confidence in Woodside Energy Group’s ability to complete complex offshore and LNG developments.

The larger test will come after the first cargo. Investors will focus on whether the company can ramp up production reliably, maintain project economics, complete the Pluto Train 1 modifications and avoid prolonged commissioning problems.

LNG plants can encounter problems when turbines, compressors, cryogenic equipment and process-control systems are operated together for the first time. First cargo is therefore an important milestone, but it is not the same as reaching stable nameplate production.

Why does Scarborough matter to Western Australia and Asian LNG markets?

For Western Australia, Scarborough offers additional domestic gas capacity, construction expenditure, operating employment and long-term taxation revenue. The project also supports activity across the Pilbara’s industrial, engineering, logistics and service sectors.

The proposed domestic gas capacity of up to 225 terajoules per day is relevant as Western Australia faces questions about the decline of mature fields and the availability of supply later in the decade.

Scarborough will not automatically deliver its full domestic capacity every day. Commercial contracts, plant performance and market requirements will determine actual supply. However, the project creates a significant new source that can contribute to future balancing of the Western Australian gas market.

For Asian LNG buyers, Scarborough adds supply from an established exporting jurisdiction with extensive LNG operating experience. JERA and LNG Japan’s equity positions demonstrate that Japanese companies are seeking direct participation in upstream resources as well as conventional LNG purchase contracts.

Equity participation can give buyers greater visibility over supply and closer alignment between project production and portfolio requirements. It also provides Woodside Energy Group with strategic partners whose interests extend beyond short-term commodity trading.

Scarborough will enter a competitive LNG market. New supply from Qatar, the United States, Canada and other Australian developments will compete for customers, while buyers continue to demand reliable delivery, commercial flexibility and lower emissions intensity.

The project’s long-term commercial performance will depend on its production reliability, delivered LNG cost, contract portfolio and ability to compete as global supply expands.

What is the future outlook for the Scarborough Energy Project after first LNG?

Scarborough’s immediate outlook depends on the final commissioning programme. Woodside Energy Group must complete offshore testing, establish reliable well and FPU performance, finish the Pluto Train 2 start-up sequence and coordinate those systems with the export pipeline and onshore facilities.

The official first LNG cargo target remains the fourth quarter of 2026. Meeting that target would be a major achievement for a project that was revised to a US$12.5 billion cost baseline and has required simultaneous offshore, pipeline and onshore construction.

After first cargo, attention will move to production ramp-up and operational reliability. The initial eight wells must supply gas at the expected rates, while Pluto Train 2 must demonstrate that its compressors, turbines and cryogenic systems can sustain commercial output.

The development plan provides longer-term flexibility because 13 wells are planned over the life of the field. Additional wells can help maintain production as reservoir conditions change and the initial wells decline.

The integrated Pluto configuration also gives Woodside Energy Group options to process Scarborough gas through the new Train 2, the modified Train 1 and domestic gas facilities. The allocation will depend on capacity availability, contractual commitments and market economics.

Scarborough’s long-term relevance lies in the tension between three priorities. Woodside Energy Group and its partners want to monetise a large offshore gas resource, Western Australia needs secure domestic supply, and Asian customers continue to seek reliable LNG while facing growing pressure to decarbonise.

If Scarborough produces its first LNG cargo in Q4 2026 and ramps up without prolonged disruption, the project will strengthen Woodside Energy Group’s execution record and improve the productive value of Pluto LNG.

A delay would not eliminate Scarborough’s long-term economic potential, but it would increase scrutiny of commissioning risk, the revised US$12.5 billion investment and Woodside Energy Group’s broader capital programme.

After more than four decades of appraisal and development planning, Scarborough is approaching the moment that matters most. The project is no longer primarily a resource estimate, construction site or future LNG concept. It is becoming an operating test of whether Woodside Energy Group can convert 96% physical progress into reliable gas production, LNG exports and durable cash flow.