A common criticism of heat pumps is that they do not work in cold weather.
However, the Nordic region – particularly Sweden, Finland and Norway – offers a rebuttal to this assessment, as our research at the Regulatory Assistance Project (RAP) shows.
These three European countries have the highest heat pump sales per 1,000 households in the continent.
Sweden, Norway and Finland also have the coldest climates in Europe. In all three countries, there are now more than 40 heat pumps per 100 households, more than in any other country in the world.
At RAP, we have analysed the driving factors that led to this Nordic success story, as part of the development of our heat pump policy toolkit, which we launched at the COP27 climate summit in Sharm el-Sheikh last year.
Heat pump market growth
Installations of heat pumps in the Nordics rose quickly after 2000 and, despite a slowdown in 2012, again continued to surge after 2015.
Heat pumps work like an air conditioning unit (or a fridge) in reverse, to concentrate heat energy from the outside air – or a water or ground source – into building interiors.
The most common are “air-to-air” units, meaning they take heat from the outside air to blow warm air inside, whereas air-to-water units make hot water. Heat pumps are the “central technology” for low-carbon heat, the International Energy Agency (IEA) says.
Norway has the highest penetration of heat pumps worldwide, most of which are air-to-air systems. By 2020, there were 60 heat pumps installed per 100 households in Norway. Most of this happened after 2001 when the heat pump market grew significantly from a low base of around 2,000 units per year to more than 155,000 units sold in 2022.
Similarly, in Finland, before 2000 only a few hundred units of heat pumps were installed per year. From the mid-2000s onwards, the country saw a rapid growth with cumulative installations now exceeding 1m units.
This can be seen in the chart below, which shows annual heat pump sales in Finland, Norway and Sweden from 1990 to 2021.
Because heat pumps use electricity that increasingly comes from low-carbon sources they lead to carbon emission reductions overall. Cumulatively, the heat pumps sold over the past 30 years contributed to a -72% drop in carbon dioxide (CO2) emissions from heating in Finland, -83% in Norway and -95% in Sweden.
In addition, recent RAP analysis shows that heat pumps, even at temperatures sub-zero, are two- to three times more efficient than fossil-fuel heating systems.
This rapid reduction in carbon emissions from heating cannot be attributed to heat pumps alone — district heating, also known as heat networks, has become less carbon intensive and buildings have been built and retrofitted to a higher fabric efficiency standard over time. However, heat pumps played a key part.
Achieving heat pump leadership
The Nordic countries were previously heavily reliant on heating oil to keep warm, a result of the absence of a widespread gas grid.
They – Finland, Norway and Sweden (Denmark uses district heating as its main source of heating, with two-thirds of homes relying on it) – made an early decision to move away from heating oil following the energy crisis in the 1970s. This had seen the oil price rocket by almost 300% due to an oil embargo by the Organisation of Arab Petroleum Exporting Countries (OAPEC).
This crisis led to a widely supported goal to become independent from fossil-fuel imports, perhaps most starkly evident with the creation of a Commission for Oil Independence in Sweden in 2005.
Despite changes in political parties over time, this has remained a constant focus in national energy policy across these countries – and explains why fossil fuels make up a low share of heating fuels in Finland (22%), Norway (less than 1%) and Sweden (3%).
The decision to move away from oil heating provided an important stimulus for research and development of heat pump technology, followed by various promotional government programmes, including information campaigns and grant payments.
For Norway, specifically, it also had a large share of homes using electric heating. Converting electrically heated homes to heat pumps provides significant reductions in electricity demand and running costs because heat pumps are, typically,about three times more efficient than direct resistance heating.
More recently, regulations, such as the complete ban of using heating oil in buildings for heating, have come into effect in Norway. In June 2018, the government adopted a regulation banning the use of mineral oil (fossil oil) for the heating of buildings from 2020. The ban covers the use of mineral oil for heating in residential buildings, public buildings and commercial buildings.
Historic household electricity prices in all three countries were also relatively low compared to many other European countries with about €0.17 per kilowatt hour (KWh) in Finland and Norway and €0.20/kWh in Sweden before the price crisis.
Carbon taxation
Carbon taxation has played a key role in making heat pumps economically competitive in all three countries. In 1990, Finland was the first country in the world to introduce a carbon tax, which currently stands at €53 per tonne of CO2 (tCO2) for heating fuels.
Shortly after Finland, Sweden adopted a CO2 tax in 1991. Since its introduction, it has increased from €21/tCO2 to €102/tCO2 in 2022.
Norway also introduced a carbon tax in 1991, which reached €76/tCO2 in 2023. The government’s white paper on energy policy announced that the tax would rise to €196/tCO2 in 2030, which would be one of the highest levels in the Organisation for Economic Co-operation and Development (OECD).
Many other countries across Europe have addressed imbalances in taxation of heating fuels to encourage heat pump uptake, including the Netherlands, Denmark and Germany, according to RAP analysis.
In Denmark, electricity used for heat pumps in homes is exempt from energy taxes to the minimum amount allowed under EU law. In Germany, levies have been shifted from bills to the public budget.
Air-to-air heat pumps
It is notable from the RAP data presented above that two-thirds of the heat pumps sold in the three countries are air-to-air heat pumps. This differs from other major European heat pump markets, such as Germany and Poland, where the majority of heat pumps are air-to-water.
The reason for this is that, in many cases, heat pumps replaced electric resistive heating with no hot water running through radiators.
Furthermore, the architecture in the Nordic countries tends to be more open plan compared to other European countries. This makes the application of air-to-air a more attractive proposition, without the need for extensive ducting or multiple individual fans.
In addition, air-to-air heat pumps are lower cost compared to air-to-water heat pumps, according to the IEA.
Air-to-air heat pumps can also be used for cooling. However, the Finnish Heat Pump Association estimates that air-to-air heat pumps used for cooling account for only 10%-15% of the market, with the majority being used for heating only.
In some cases (although, according to the Finnish heat pump association, this is a small minority) more than one heat pump is installed in a single building and heat pumps are also often operating with a second heat source being present.
Many homes continue to use wood stoves after having installed a heat pump as a study from the Oslo Centre for Research on Environmentally Friendly Energy (CREE) on heat pumps shows, albeit less frequently. This resulted in about a quarter less wood being used for heating in 2021 compared to 2010. The continued use of wood is at least in part a result of aesthetic and cultural preferences.
In Finland, heat pumps are often installed as an additional heating system complementing mainly electric heating.
Nordic clean heating lessons
RAP’s analysis has found that the success of heat pumps in the Nordics is not accidental.
Instead, it is the result of a mix of policy instruments working in concert, such as carbon taxation, government incentives, regulations, quality standards, consumer protection for example through the creation of bodies to deal with complaints and offer redress, and information campaigns.
The natural efficiency of heat pumps has also helped their deployment.
The key takeaway is that there is no single policy that can deliver a mass market for heat pumps. A well-designed policy mix of economic instruments, financial support and regulation, underpinned by coordination and engagement, turns out to be the most effective recipe for scaling up heat-pump deployment, according to RAP’s research.
The experience in the Nordic countries illustrates not only what can be achieved in just two decades, but how to do it.
Policymakers in countries where heat pumps are still in their infancy do not have to start from scratch, but can learn from – and build on – the heat-pump success story in Norway, Finland and Sweden.
The post Guest post: How heat pumps became a Nordic success story appeared first on Carbon Brief.
What if Australia’s worst offshore oil spill hasn’t happened yet?
I’m terrified by the thought.
Our new report in partnership with Environs Kimberley analyses Woodside’s own oil spill modelling and it reveals a worst-case blowout at the corporation’s proposed Browse gas project at Scott Reef could be up to 30 times larger than the Montara oil spill – one of Australia’s worst environmental disasters to date.
Woodside’s own modelling warns that oil pollution could spread across Scott Reef, the Kimberley coast and beyond, with impacts Woodside itself describes as “severe”, “potentially irreversible” and “catastrophic”.
What’s at stake?
Scott Reef really is like nowhere else on Earth.
Scott Reef is Australia’s largest freestanding oceanic reef, a pristine marine ecosystem that has thrived for around 15 million years. About 270 kilometres off the Kimberley coast, it supports more than 2,000 marine species, including endangered pygmy blue whales, nesting green sea turtles, the endangered dusky sea snake and ancient corals.
Yet Woodside wants to drill up to 57 toxic wells around and underneath it, causing decades of deafening seismic blasting, light and noise pollution, shipping traffic and, of course, the risk of a ‘catastrophic’ oil spill.
What did Woodside’s modelling find?
Before Browse can be approved, Woodside is required to assess what could happen if something goes wrong. We analysed the corporation’s own environmental assessment documents, and the findings are deeply concerning.
Woodside’s modelling shows that the most severe Browse scenario would be the worst oil spill in Australian history, releasing up to 893,739 barrels of condensate into the Timor Sea. For context, the Montara oil spill released 30,000 barrels of oil.
A blowout of this scale could see oil spread hundreds of kilometres, reaching some of Australia’s most important marine environments, extending into Indonesian and Timor-Leste waters and even washing up along parts of the Kimberley coast. Entrained oil – oil mixed throughout the water column – is predicted to travel up to 863 kilometres from the spill site.
The modelling identifies potential impacts to at least nine marine parks, eight reefs and three Indigenous Protected Areas, as well as important habitats for endangered species, including pygmy blue whales, green sea turtles, seabirds and other marine life.
These aren’t just places on a map. They are globally significant marine ecosystems that support ancient coral reefs, endangered wildlife, tourism, fisheries and coastal communities. A spill of this scale wouldn’t simply affect one reef; it has the potential to impact an entire connected marine ecosystem.
Why this matters now
The most important thing is that Browse has not yet been approved. That means there is still time to stop Browse and the serious risks outlined in Woodside’s own modelling.
The science has been done. The risks have been modelled. The decision now rests with the Australian Government.
Governments are often forced to respond after environmental disasters happen. This is one of those rare moments where they have the opportunity to act before one does.
What you can do
Together, we still have the power to stop Woodside and save Scott Reef.
You can help by:
- Sending an email to Environment Minister Murray Watt and Prime Minister Anthony Albanese, calling on them to reject Browse.
- Sharing this story to help more Australians understand what’s at stake.
- Encouraging your friends and family to take action.
The more people who support saving Scott Reef, the harder it is for governments to approve Woodside’s drilling plans – Browse.
Together, we can ensure a reef that has existed for millions of years is known for its incredible biodiversity – not as the site of Australia’s worst oil spill.
Let’s save Scott Reef.
What if Australia’s worst offshore oil spill hasn’t happened yet?
Analysis by Greenpeace and Environs Kimberley shows that a severe oil spill at Scott Reef could be the worst in Australian history — Woodside has labeled the impact of such a spill ‘catastrophic’.
According to the fossil fuel company the impacts to Scott Reef ‘would likely be severe and potentially irreversible’. Oily pollution could reach as far as the Kimberley coast to the coasts of Indonesia and Timor Leste while endangered marine species live, breed, forage and migrate within the potential disaster zone: whales, seabirds, turtles and other marine life are all at risk.
Report Summary
Woodside’s Browse drilling plans at Scott Reef have been found to pose unacceptable risks to the Western Australian environment once before. To secure their approvals under Federal and Western Australian law, Woodside has modelled a number of possible oil spill scenarios that could result from the Browse project.
Key Findings
- The most severe Browse scenario would be the worst oil spill in Australian history – up to 30 times bigger than the 2009 Montara oil spill disaster. According to Woodside, the environmental impact of such a spill would be ‘catastrophic’.
- Scott Reef and Sandy Islet could be covered in oily pollution. Woodside has conceded that the impacts to Scott Reef from a major spill ‘would likely be severe and potentially irreversible’.
- A blowout of this scale could see oil washing up on the Western Australian Kimberley Coast, and affect at least nine marine parks, eight reefs, three Indigenous Protected Areas, and several islands in Australian, Indonesian and Timor Leste waters.
- Endangered and vulnerable marine species live, breed, forage and migrate within the potential disaster zone: whales, seabirds, turtles and other marine life are all at risk.
- A Browse oil spill threatens important tourism, diving, surfing and fishing hotspots, with potential ‘long term impacts’ for tourism operators in the Kimberley or visiting Rowley Shoals or Scott Reef.
Scott Reef: An ancient oceanic reef system
Scott Reef, located around 270 kilometres off the Western Australian Kimberley coast, is one of Australia’s largest oceanic reef systems. Ancient Scott Reef has been thriving for 15 million years, having adapted to changing seas. Today, it is a haven for marine life, providing vital habitat for more than a thousand species, including corals, fish, sharks and rays.
The deep waters surrounding the reef are home to 29 known species of whale and dolphin, including endangered pygmy blue whales, which travel along the Western Australian coast and stop at Scott Reef during their annual migration to forage and feed. The dusky sea snake, also classified as endangered, lives at Scott Reef. Sandy Islet, part of Scott Reef, is a nesting ground for a small population of genetically distinct green sea turtles, a species classified as vulnerable.
If Woodside, Australia’s largest oil and gas company, were to gain approval to drill for gas at Scott Reef, the ecosystem would face a barrage of industrial impacts, including seismic blasting, gas flaring, underwater noise, artificial lighting, pipe- laying, and fast-moving vessels over years of construction and operation. Add to that the risk of a major oil spill that could be Australia’s worst environmental disaster, with consequences spreading far beyond Scott Reef.
A disaster worse than Montara, according to Woodside itself
Woodside has proposed drilling 50 new wells around Scott Reef to extract oil and gas from beneath the reef as part of the Browse project. Woodside has proposed to build a 900-kilometre-long undersea pipeline to connect the Scott Reef-Browse site with its North West Shelf facility at Karratha in Western Australia, where the gas would be processed, mostly for international export. Woodside has modelled a number of possible oil spill scenarios that could result from the Browse project. Woodside performed this modelling to comply with mandatory environmental impact assessment requirements under Federal and Western Australian laws.
To identify which areas are at risk of an oil spill from the Browse project, Woodside engaged experts to conduct probabilistic modelling. Experts simulated different spills, noting which locations would be contaminated by oil and how much oil would make it to shore. They also assessed how likely each location was to be affected.
” Woodside’s ‘worst case’ scenario is a blowout at the Torosa gasfield, directly under Scott Reef.”
Greenpeace Australia Pacific and Environs Kimberley’s analysis shows an oil spill at Torosa could see 893,739 barrels of condensate spilled into the Timor Sea. This would be up to 30 times bigger than the 2009 Montara oil spill, considered one of Australia’s worst environmental disasters. Oil leaked into the Timor Sea for days after an oil rig caught fire off the Western Australian coast, causing a 90,000 square kilometre oil slick that spread all the way to Indonesia.
People, places and wildlife at risk
Woodside’s modelling shows that an oil spill at Scott Reef could affect eight reefs, at least nine marine parks and three Indigenous Protected Areas. In the event of a worst-case oil spill, Scott Reef and Sandy Islet, being closest to the wellhead, would be worst affected.
Woodside’s modelling finds that the impacts to Scott Reef from a major spill like this ‘would likely be severe and potentially irreversible’. The impacts of an oil spill are not confined to Scott Reef – according to Woodside’s modelling, ‘hydrocarbon spills resulting from the proposed Browse to NWS Project have the potential to significantly impact shoreline habitats at Scott Reef, Ashmore Reef, Cartier Island and Rowley Shoals.’
Oil from a blowout could also reach neighbouring countries, including Pulau Rote, Savu, Sumba and West Timor in Indonesia, and Timor Leste. This is not an exhaustive list of all places that could be affected by an oil spill at Scott Reef. Once oil hits the water, its spread is influenced by the wind, tides, currents and other external conditions. An oil spill from the Browse project could have a less or more severe impact than the modelling indicates. Equally, Woodside cannot rule out other sites being affected.
A disaster for marine life
Woodside’s oil spill modelling shows that a blowout from the Browse project would put whales, turtles, seabirds, coral, significant feedstocks such as plankton and seagrass, fish, dolphins and other marine life at risk. According to Woodside, a Browse oil spill would:
- Directly threaten the coral at Scott Reef, with ‘potential for near total coral mortality in the worst affected areas’; a severe spill could also harm coral at Seringapatam Reef and the Rowley Shoals.
- ‘Significantly impact’ the plankton, seagrass and macroalgae that support the entire food chain.
- ‘Significantly impact bird species, including protected species’, which are ‘particularly vulnerable’ to oil spills.
A spill would not only threaten birds at Scott Reef, but those that nest or breed at Ashmore Reef and Cartier Island, Browse Island, islands along the Kimberley coastline (such as the Lacepede Islands) and Rowley Shoals. Woodside’s oil spill modelling specifically notes the potential risk to thirteen species of seabirds.
Oil spills also threaten whales and other cetaceans, especially concentrations of oil on the surface of the water. This can cause ‘sublethal and lethal effects’, especially when feeding, as whales and other marine mammals have been found to aspirate oil when breathing through an oil slick at the sea surface, thus absorbing hydrocarbons directly into their lungs, leading to sublethal and lethal impacts.
According to Woodside’s modelling, a Browse oil spill could be particularly harmful to the spinner dolphins living at Scott Reef with the potential for ‘a significant portion of this local population to be impacted in the event of a worst-case hydrocarbon spill’.
Marine reptiles, including the green sea turtles found at Scott Reef, are also at risk. Woodside’s modelling warns that an oil spill could cause ‘significant mortality amongst adults and hatchlings’, leading to ‘the potential for longer-term impacts on the Scott Reef – Browse Island genetic stock of green turtles’. Further, an oil spill could have lasting impacts on the breeding populations of olive ridley turtles, flatback turtles and hawksbill turtles. Essentially, all marine life found at or near the sea surface could be impacted by such a spill.
Woodside cannot be trusted
In Woodside’s inadequate response plan, Woodside states that it considers an oil spill to be ‘highly unlikely’ and the threat to the environment and wildlife to be ‘acceptable’. We do not believe these are credible assertions. For instance, the WA Environmental Protection Authority (EPA), which is assessing Woodside’s Browse to NWS proposal, did not agree. In August 2024, it emerged that the EPA advised Woodside that its Browse development posed ‘unacceptable’ risks to WA’s environment.
A potential oil spill from the Torosa field was one of the risks cited by the EPA in its preliminary decision not to approve the project. Woodside has subsequently revised its plans to drill for gas at Scott Reef, proposing to use unproven new technology that the company claims would bring a spill under control more quickly, reducing the spill time from 77 days to 13 days.
However, an independent assessment commissioned by Woodside did not support these claims. Instead, the expert questioned whether the piece of equipment proposed by Woodside — a capping stack — could be deployed in practice, and the time it would likely take to do so.
While Woodside has also claimed that a ‘pyrotechnic shear ram’ would reduce the spill time to as little as 24 hours, the company’s expert noted that this had yet to be ‘used in anger’ and that ‘there remains a risk’ that it fails to function.
Woodside’s alarming track record
Woodside’s stated ability to prevent or control a disaster is undercut by its poor environmental and safety track record. There have been numerous incidents at Woodside’s facilities over the last decade threatening the safety of its workers and the environment. These include:
- Whale calf collision: In August 2023, a tugboat operated by a Woodside contractor hit a whale calf in the Port of Dampier. The incident was only confirmed by the Department of Biodiversity, Conservation and Attractions (DBCA) after media inquiries.
- Explosion at Pluto LNG plant: In May 2023, an explosion forced Woodside to shut down and evacuate its Pluto LNG facility. Woodside was accused by unions of downplaying the incident. Eighteen months later, Woodside was again forced to put Pluto LNG into an emergency shutdown after the control systems failed.
- Oil spill near Ningaloo: In May 2025, Woodside spilled 16,000 litres of ‘hydrocarbons’ into the ocean near World Heritage listed Ningaloo Reef while decommissioning its Griffin facility. Three months later, the government regulator ordered Woodside to stop decommissioning operations at Griffin and nearby Stybarrow following a series of ‘preventable health and safety incidents’ at both sites.
- Oil spill in Cossack field: In 2016, a Woodside oil rig in the Cossack field leaked over 10,500 litres of oil into the ocean due to a degraded seal.
- Northern Endeavour clean-up debacle: Woodside evaded a $362 million decommissioning bill for its Northern Endeavour oil platform in the Timor Sea by offloading it onto a one-person operation. When the buyer went bankrupt, the Federal Government had to step in, eventually putting a levy on offshore oil and gas companies to recover the clean up costs.
- Cost-cutting and corrosion: In 2021, Woodside announced a 30% cut in operating costs, focusing on maintenance, despite repeated warnings from the government regulator about corrosion at its oil and gas facilities. The warnings continued. In July 2023, the regulator blamed Woodside’s ‘inadequate maintenance’ for serious corrosion of the flare bridge and support structure at its North Rankin complex.
- Abandoned infrastructure: Woodside finished extracting oil from the Enfield field in 2018. In 2019, the government regulator ordered Woodside to remove the Nganhurra Riser Turret Mooring (RTM), an 83-metre-long, 2,452 tonne piece of infrastructure. Woodside instead tried to sink the RTM near the World Heritage-listed Ningaloo Reef. After a public outcry, Woodside finally removed the RTM in October 2023.
A lasting legacy for our oceans: Save Scott Reef from Woodside’s pollution
Woodside’s Browse proposal to drill for oil and gas presents unacceptable risks to Scott Reef and the web of life it supports from Western Australia to Indonesia.
Greenpeace Australia Pacific and Environs Kimberley are calling on the WA and Federal Governments to save Scott Reef by rejecting Woodside’s Browse project once and for all.
What you can do
Together, we still have the power to stop Woodside and save Scott Reef.
You can help by:
- Sending an email to Environment Minister Murray Watt and Prime Minister Anthony Albanese, calling on them to reject Browse.
- Sharing this story to help more Australians understand what’s at stake.
- Encouraging your friends and family to take action.
Analysis by Greenpeace and Environs Kimberley shows that a severe oil spill at Scott Reef could be the worst in Australian history — Woodside has labeled the impact of such a spill ‘catastrophic’. According to the fossil fuel company the impacts to Scott Reef ‘would likely be severe and potentially irreversible’. Oily pollution could reach as far as the Kimberley coast to the coasts of Indonesia and Timor Leste while endangered marine species live, breed, forage and migrate within the potential disaster zone: whales, seabirds, turtles and other marine life are all at risk.
Woodside’s Browse drilling plans at Scott Reef have been found to pose unacceptable risks to the Western Australian environment once before. To secure their approvals under Federal and Western Australian law, Woodside has modelled a number of possible oil spill scenarios that could result from the Browse project.
GPAP illustration of a ‘worst case’ senario oil spill based on Woodside’s own modeling.
Key Findings
- The most severe Browse scenario would be the worst oil spill in Australian history – up to 30 times bigger than the 2009 Montara oil spill disaster. According to Woodside, the environmental impact of such a spill would be ‘catastrophic’.
- Scott Reef and Sandy Islet could be covered in oily pollution. Woodside has conceded that the impacts to Scott Reef from a major spill ‘would likely be severe and potentially irreversible’.
- A blowout of this scale could see oil washing up on the Western Australian Kimberley Coast, and affect at least nine marine parks, eight reefs, three Indigenous Protected Areas, and several islands in Australian, Indonesian and Timor Leste waters.
- Endangered and vulnerable marine species live, breed, forage and migrate within the potential disaster zone: whales, seabirds, turtles and other marine life are all at risk.
- A Browse oil spill threatens important tourism, diving, surfing and fishing hotspots, with potential ‘long term impacts’ for tourism operators in the Kimberley or visiting Rowley Shoals or Scott Reef.
Browse and Montara: Location and extent in the Timor Sea: GPAP illustration based on maps from ‘The Montara Oil Spill: A 2009 Well Blowout in the Timor Sea’ and a Browse loss of well containment.
Scott Reef: An ancient oceanic reef system
Scott Reef, located around 270 kilometres off the Western Australian Kimberley coast, is one of Australia’s largest oceanic reef systems. Ancient Scott Reef has been thriving for 15 million years, having adapted to changing seas. Today, it is a haven for marine life, providing vital habitat for more than a thousand species, including corals, fish, sharks and rays.
The deep waters surrounding the reef are home to 29 known species of whale and dolphin, including endangered pygmy blue whales, which travel along the Western Australian coast and stop at Scott Reef during their annual migration to forage and feed. The dusky sea snake, also classified as endangered, lives at Scott Reef. Sandy Islet, part of Scott Reef, is a nesting ground for a small population of genetically distinct green sea turtles, a species classified as vulnerable.
If Woodside, Australia’s largest oil and gas company, were to gain approval to drill for gas at Scott Reef, the ecosystem would face a barrage of industrial impacts, including seismic blasting, gas flaring, underwater noise, artificial lighting, pipe- laying, and fast-moving vessels over years of construction and operation. Add to that the risk of a major oil spill that could be Australia’s worst environmental disaster, with consequences spreading far beyond Scott Reef.
GPAP illustration of drilling sights at Scott Reef.
A disaster worse than Montara, according to Woodside itself
Woodside has proposed drilling 50 new wells around Scott Reef to extract oil and gas from beneath the reef as part of the Browse project. Woodside has proposed to build a 900-kilometre-long undersea pipeline to connect the Scott Reef-Browse site with its North West Shelf facility at Karratha in Western Australia, where the gas would be processed, mostly for international export. Woodside has modelled a number of possible oil spill scenarios that could result from the Browse project. Woodside performed this modelling to comply with mandatory environmental impact assessment requirements under Federal and Western Australian laws.
To identify which areas are at risk of an oil spill from the Browse project, Woodside engaged experts to conduct probabilistic modelling. Experts simulated different spills, noting which locations would be contaminated by oil and how much oil would make it to shore. They also assessed how likely each location was to be affected.
” Woodside’s ‘worst case’ scenario is a blowout at the Torosa gasfield, directly under Scott Reef.”
Greenpeace Australia Pacific and Environs Kimberley’s analysis shows an oil spill at Torosa could see 893,739 barrels of condensate spilled into the Timor Sea. This would be up to 30 times bigger than the 2009 Montara oil spill, considered one of Australia’s worst environmental disasters. Oil leaked into the Timor Sea for days after an oil rig caught fire off the Western Australian coast, causing a 90,000 square kilometre oil slick that spread all the way to Indonesia.
People, places and wildlife at risk
Woodside’s modelling shows that an oil spill at Scott Reef could affect eight reefs, at least nine marine parks and three Indigenous Protected Areas. In the event of a worst-case oil spill, Scott Reef and Sandy Islet, being closest to the wellhead, would be worst affected.
Woodside’s modelling finds that the impacts to Scott Reef from a major spill like this ‘would likely be severe and potentially irreversible’. The impacts of an oil spill are not confined to Scott Reef – according to Woodside’s modelling, ‘hydrocarbon spills resulting from the proposed Browse to NWS Project have the potential to significantly impact shoreline habitats at Scott Reef, Ashmore Reef, Cartier Island and Rowley Shoals.’
Oil from a blowout could also reach neighbouring countries, including Pulau Rote, Savu, Sumba and West Timor in Indonesia, and Timor Leste. This is not an exhaustive list of all places that could be affected by an oil spill at Scott Reef. Once oil hits the water, its spread is influenced by the wind, tides, currents and other external conditions. An oil spill from the Browse project could have a less or more severe impact than the modelling indicates. Equally, Woodside cannot rule out other sites being affected.
A disaster for marine life
Woodside’s oil spill modelling shows that a blowout from the Browse project would put whales, turtles, seabirds, coral, significant feedstocks such as plankton and seagrass, fish, dolphins and other marine life at risk. According to Woodside, a Browse oil spill would:
- Directly threaten the coral at Scott Reef, with ‘potential for near total coral mortality in the worst affected areas’; a severe spill could also harm coral at Seringapatam Reef and the Rowley Shoals.
- ‘Significantly impact’ the plankton, seagrass and macroalgae that support the entire food chain.
- ‘Significantly impact bird species, including protected species’, which are ‘particularly vulnerable’ to oil spills.
A spill would not only threaten birds at Scott Reef, but those that nest or breed at Ashmore Reef and Cartier Island, Browse Island, islands along the Kimberley coastline (such as the Lacepede Islands) and Rowley Shoals. Woodside’s oil spill modelling specifically notes the potential risk to thirteen species of seabirds.
Oil spills also threaten whales and other cetaceans, especially concentrations of oil on the surface of the water. This can cause ‘sublethal and lethal effects’, especially when feeding, as whales and other marine mammals have been found to aspirate oil when breathing through an oil slick at the sea surface, thus absorbing hydrocarbons directly into their lungs, leading to sublethal and lethal impacts.
According to Woodside’s modelling, a Browse oil spill could be particularly harmful to the spinner dolphins living at Scott Reef with the potential for ‘a significant portion of this local population to be impacted in the event of a worst-case hydrocarbon spill’.
Marine reptiles, including the green sea turtles found at Scott Reef, are also at risk. Woodside’s modelling warns that an oil spill could cause ‘significant mortality amongst adults and hatchlings’, leading to ‘the potential for longer-term impacts on the Scott Reef – Browse Island genetic stock of green turtles’. Further, an oil spill could have lasting impacts on the breeding populations of olive ridley turtles, flatback turtles and hawksbill turtles. Essentially, all marine life found at or near the sea surface could be impacted by such a spill.
GPAP illustration of pygmy blue whale and humpback whale migration path through Scott Reef and a ‘worst case’ oil spill senario based on Woodside’s own modeling.
Woodside cannot be trusted
In Woodside’s inadequate response plan, Woodside states that it considers an oil spill to be ‘highly unlikely’ and the threat to the environment and wildlife to be ‘acceptable’. We do not believe these are credible assertions. For instance, the WA Environmental Protection Authority (EPA), which is assessing Woodside’s Browse to NWS proposal, did not agree. In August 2024, it emerged that the EPA advised Woodside that its Browse development posed ‘unacceptable’ risks to WA’s environment.
A potential oil spill from the Torosa field was one of the risks cited by the EPA in its preliminary decision not to approve the project. Woodside has subsequently revised its plans to drill for gas at Scott Reef, proposing to use unproven new technology that the company claims would bring a spill under control more quickly, reducing the spill time from 77 days to 13 days.
However, an independent assessment commissioned by Woodside did not support these claims. Instead, the expert questioned whether the piece of equipment proposed by Woodside — a capping stack — could be deployed in practice, and the time it would likely take to do so.
While Woodside has also claimed that a ‘pyrotechnic shear ram’ would reduce the spill time to as little as 24 hours, the company’s expert noted that this had yet to be ‘used in anger’ and that ‘there remains a risk’ that it fails to function.
Woodside’s alarming track record
Woodside’s stated ability to prevent or control a disaster is undercut by its poor environmental and safety track record. There have been numerous incidents at Woodside’s facilities over the last decade threatening the safety of its workers and the environment. These include:
- Whale calf collision: In August 2023, a tugboat operated by a Woodside contractor hit a whale calf in the Port of Dampier. The incident was only confirmed by the Department of Biodiversity, Conservation and Attractions (DBCA) after media inquiries.
- Explosion at Pluto LNG plant: In May 2023, an explosion forced Woodside to shut down and evacuate its Pluto LNG facility. Woodside was accused by unions of downplaying the incident. Eighteen months later, Woodside was again forced to put Pluto LNG into an emergency shutdown after the control systems failed.
- Oil spill near Ningaloo: In May 2025, Woodside spilled 16,000 litres of ‘hydrocarbons’ into the ocean near World Heritage listed Ningaloo Reef while decommissioning its Griffin facility. Three months later, the government regulator ordered Woodside to stop decommissioning operations at Griffin and nearby Stybarrow following a series of ‘preventable health and safety incidents’ at both sites.
- Oil spill in Cossack field: In 2016, a Woodside oil rig in the Cossack field leaked over 10,500 litres of oil into the ocean due to a degraded seal.
- Northern Endeavour clean-up debacle: Woodside evaded a $362 million decommissioning bill for its Northern Endeavour oil platform in the Timor Sea by offloading it onto a one-person operation. When the buyer went bankrupt, the Federal Government had to step in, eventually putting a levy on offshore oil and gas companies to recover the clean up costs.
- Cost-cutting and corrosion: In 2021, Woodside announced a 30% cut in operating costs, focusing on maintenance, despite repeated warnings from the government regulator about corrosion at its oil and gas facilities. The warnings continued. In July 2023, the regulator blamed Woodside’s ‘inadequate maintenance’ for serious corrosion of the flare bridge and support structure at its North Rankin complex.
- Abandoned infrastructure: Woodside finished extracting oil from the Enfield field in 2018. In 2019, the government regulator ordered Woodside to remove the Nganhurra Riser Turret Mooring (RTM), an 83-metre-long, 2,452 tonne piece of infrastructure. Woodside instead tried to sink the RTM near the World Heritage-listed Ningaloo Reef. After a public outcry, Woodside finally removed the RTM in October 2023.
A lasting legacy for our oceans: Save Scott Reef from Woodside’s pollution
Woodside’s Browse proposal to drill for oil and gas presents unacceptable risks to Scott Reef and the web of life it supports from Western Australia to Indonesia.
Greenpeace Australia Pacific and Environs Kimberley are calling on the WA and Federal Governments to save Scott Reef by rejecting Woodside’s Browse project once and for all.
What you can do
Together, we still have the power to stop Woodside and save Scott Reef.
You can help by:
- Sending an email to Environment Minister Murray Watt and Prime Minister Anthony Albanese, calling on them to reject Browse.
- Sharing this story to help more Australians understand what’s at stake.
- Encouraging your friends and family to take action.
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