Canadian Energy Centre
Why Canadian oil is so important to the United States

From the Canadian Energy Centre
Complementary production in Canada and the U.S. boosts energy security
The United States is now the world’s largest oil producer, but its reliance on oil imports from Canada has never been higher.
Through a vast handshake of pipelines and refineries, Canadian oil and U.S. oil complement each other, strengthening North American energy security.
Here’s why.
Decades in the making
Twenty years ago, the North American energy market looked a lot different than it does today.
In the early 2000s, U.S. oil production had been declining for more than 20 years. By 2005, it dropped to its lowest level since 1949, according to the U.S. Energy Information Administration (EIA).
America’s imports of oil from foreign nations were on the rise.
But then, the first of two powerhouse North American oil plays started ramping up.
In Canada’s oil sands, a drilling technology called SAGD – steam-assisted gravity drainage – unlocked enormous resources that could not be economically produced by the established surface mining processes. And the first new mines in nearly 25 years started coming online.
In about 2010, the second massive play – U.S. light, tight oil – emerged on the scene, thanks to hydraulic fracturing technology.
Oil sands production jumped from about one million barrels per day in 2005 to 2.5 million barrels per day in 2015, reaching an average 3.5 million barrels per day last year, according to the Canada Energy Regulator.
Meanwhile, U.S. oil production skyrocketed from 5.5 million barrels per day in 2005 to 9.4 million barrels per day in 2015 and 13.3 million barrels per day in 2024, according to the EIA.
Together the United States and Canada now produce more oil than anywhere else on earth, according to S&P Global.
As a result, overall U.S. foreign oil imports declined by 35 per cent between 2005 and 2023. But imports from Canada have steadily gone up.
In 2005, Mexico, Saudi Arabia, Venezuela and Nigeria together supplied 52 per cent of U.S. oil imports. Canada was at just 16 per cent.
In 2024, Canada supplied 62 per cent of American oil imports, with Mexico, Saudi Arabia and Venezuela together supplying just 14 per cent, according to the EIA.
“Light” and “heavy” oil
Canadian and U.S. oil production are complementary because they are different from each other in composition.
Canada’s oil exports to the U.S. are primarily “heavy” oil from the oil sands, while U.S. production is primarily “light” oil from the Permian Basin in Texas and New Mexico.
One way to think of it is that heavy oil is thick and does not flow easily, while light oil is thin and flows freely – like orange juice compared to fudge.
The components that make the oil like this require different refinery equipment to generate products including gasoline, jet fuel and base petrochemicals.
Of the oil the U.S. imported from Canada from January to October last year, 75 per cent was heavy, six per cent was light, and the remaining 19 per cent was “medium,” which basically has qualities in between the two.
Tailored for Canadian crude
Many refineries in the United States are specifically designed to process heavy oil, primarily in the U.S. Midwest and U.S. Gulf Coast.
Overall, there are about 130 operable oil refineries in the United States, according to the American Fuel and Petrochemical Manufacturers.
The Alberta Petroleum Marketing Commission (APMC) estimates that 25 consistently use oil from Alberta.
According to APMC, the top five U.S. refineries running the most Alberta crude are:
- Marathon Petroleum, Robinson, Illinois (100% Alberta crude)
- Exxon Mobil, Joliet, Illinois (96% Alberta crude)
- CHS Inc., Laurel, Montana (95% Alberta crude)
- Phillips 66, Billings, Montana (92% Alberta crude)
- Citgo, Lemont, Illinois (78% Alberta crude)
Since 2010, virtually 100 per cent of oil imports to the U.S. Midwest have come from Canada, according to the EIA.
In recent years, new pipeline access and crude-by-rail have allowed more Canadian oil to reach refineries on the U.S. Gulf Coast, rising from about 140,000 barrels per day in 2010 to about 450,000 barrels per day in 2024.
U.S. oil exports
The United States banned oil exports from 1975 to the end of 2015. Since, exports have surged, averaging 4.1 million barrels per day last year, according to the EIA.
That is nearly equivalent to the 4.6 million barrels per day of Canadian oil imported into the U.S. over the same time period, indicating that Canadian crude imports enable sales of U.S. oil to global markets.
Future outlook
Twenty-five years from now, the U.S. will need to import virtually exactly the same amount of oil as it does today (7.0 million barrels per day in 2050 compared to 6.98 million barrels per day in 2023), according to the EIA.
Canadian Energy Centre
‘Big vulnerability’: How Ontario and Quebec became reliant on U.S. oil and gas

From the Canadian Energy Centre
ARC Energy Institute leaders highlight the need for a new approach in a new reality
Despite Canada’s status as one of the world’s largest oil and gas producers, more than half of the country’s own population does not have true energy security – uninterrupted, reliable access to the energy they need at an affordable price.
Even though Western Canada produces much of the oil consumed in Ontario and Quebec, in order to get there, it moves on pipelines that run through the United States.
“It’s only energy secure if the Americans are our partners and friends,” leading energy researcher Jackie Forrest said on a recent episode of the ARC Energy Ideas podcast.
Amid rising trade tensions with the United States, energy security is taking on greater importance. But Forrest said the issue is not well understood across Canada.
“The concern is that in the worst-case scenario where the Americans want to really hurt our country, they have the ability to stop all crude oil flows to Ontario,” she said.
That action would also cut off the majority of oil supply to Quebec.
The issue isn’t much better for natural gas, with about half of consumption in Ontario and Quebec supplied by producers in the U.S.
“Tariffs or no tariffs, there is a real vulnerability there,” said Forrest’s co-host Peter Tertzakian, founder of the ARC Energy Research Institute.
The issue won’t go away with increased use of new technology like electric cars, he said.
“This isn’t just about combustion in engines. It’s about securing a vital commodity that is an input into other parts of our manufacturing and sophisticated economy.”
Oil: The Enbridge Mainline
The Enbridge Mainline is the main path for oil from Western Canada to reach refineries in Ontario and Quebec, according to the Canadian Association of Petroleum Producers (CAPP).
Originating in Edmonton, Alberta, the Enbridge Mainline moves crude oil, refined products, and natural gas liquids through a connected pipeline system. At Superior, Wisconsin, the system splits into Line 5, going north of Lake Michigan, and Lines 6, 14, and 61, going around the southern tip of the lake. The two routes then coalesce and terminate in Sarnia, Ontario, where it is interconnected with Line 9, which is terminated in Montreal, Quebec. Source: Canadian Association of Petroleum Producers
Originally built in 1950 from Edmonton to Superior, Wisconsin, in 1953, it was extended to Sarnia, Ontario through a segment known as Line 5.
CAPP said that at the time, politicians had pushed for an all-Canadian path north of the Great Lakes to increase energy security, but routes through the U.S. were chosen because of lower project costs and faster timelines.
In 1979, an extension of the pipeline called Line 9 opened, allowing oil to flow east from Sarnia to Montreal.
“Line 9 was built after the oil crisis and the OPEC embargo as a way to bring western Canadian crude oil into Quebec,” Forrest said.
But by the 1990s – before the massive growth in Alberta’s oil sands – there was a lack of crude coming from Western Canada. It became more economically attractive for refineries in Quebec and Ontario to import oil from overseas via the St. Lawrence River, CAPP said.
A reversal in 1999 allowed crude in Line 9 to flow west from Montreal to Sarnia.
By the 2010s, the situation had changed again, with production from the Alberta oil sands and U.S. shale plays surging. With more of that oil available, the offshore crude was deemed to be more expensive, Forrest said.
In 2015, Line 9 was reversed to send oil east again from Sarnia to Montreal, displacing oil from overseas but not resolving the energy security risk of Canadian pipelines running through the U.S.
CAPP said the case of Line 5 illustrates this risk. In 2020, the Governor of Michigan attempted to shut down the pipeline over concerns about pipeline leak or potential oil spill in a seven-kilometre stretch under the Straits of Mackinac.
Line 5 has been operating in the Straits for 72 years without a single release.
Enbridge is advancing a project to encase the pipeline in a protective tunnel in the rock beneath the lakebed, but the legal battle with the State of Michigan remains ongoing.
Natural gas: The TC Canadian Mainline
The natural gas pipeline now known as TC Energy’s Canadian Mainline from Alberta was first built in 1958.
The TC Canadian Mainline (red dashed line) transports natural gas produced in Western Canada to markets in Eastern Canada. Red lines show pipelines regulated by the Canada Energy Regulator, while black lines show pipelines regulated by the United States. Source: Canadian Association of Petroleum Producers
“This pipeline brought gas into Ontario, and then it was extended to go into Quebec, and that was good for a long time,” Forrest said.
“But over time we built more pipelines into the United States, and it was a better economic path to go through the United States.”
The Mainline started running not at its full capacity, which caused tolls to go up and made it less and less attractive compared to U.S. options.
According to CAPP, between 2006 and 2023 the Mainline’s deliveries of gas from Western Canada to Ontario and Quebec were slashed in half.
“We should have said, ‘We need to find a way for this pipeline, over our own soil, to be competitive with the alternative’. But we didn’t,” Forrest said.
“Instead, we lost market share in Eastern Canada. And today we’re in a big bind, because if the Americans were to cut off our natural gas, we wouldn’t have enough natural gas into Quebec and Ontario.”
A different approach for a new reality
Forrest said the TC Mainline, which continues to operate at about half of its capacity, presents an opportunity to reduce Canada’s reliance on U.S. natural gas while at the same time building energy security for oil.
“Those are the same pipes that were going to be repurposed for oil, for Energy East,” Tertzakian said.
“The beauty of the thing is that actually, I don’t think it would take that long if we had the will… It’s doable that we can be energy secure.”
This could come at a higher cost but provide greater value over the long term.
“That’s always been the issue in Canada, when it comes to energy, we always go with the cheapest option and not the most energy secure,” Forrest said.
“And why? Because we always trusted our American neighbor to never do anything that will impact the flow of that energy. And I think we’re waking up to a new reality.”
Alberta
U.S. tariffs or not, Canada needs to build new oil and gas pipeline space fast

From the Canadian Energy Centre
Expansion work underway takes on greater importance amid trade dispute
Last April, as the frozen landscape began its spring thaw, a 23-kilometre stretch of newly built pipeline started moving natural gas across northwest Alberta.
There was no fanfare when this small extension of TC Energy’s Nova Gas Transmission Limited (NGTL) system went online – adding room for more gas than all the homes in Calgary use every day.
It’s part of the ongoing expansion of the NGTL system, which connects natural gas from British Columbia and Alberta to the vast TC Energy network. In fact, one in every 10 molecules of natural gas moved across North America touches NGTL.
With new uncertainty emerging from Canada’s biggest oil and gas customer – the United States – there is a rallying cry to get new major pipelines built to reach across Canada and to wider markets.
Canada’s Natural Resources Minister Jonathan Wilkinson recently said the country should consider building a new west-east oil pipeline following U.S. President Donald Trump’s threat of tariffs, calling the current lack of cross-country pipelines a “vulnerability,” CBC reported.
“I think we need to reflect on that,” Wilkinson said. “That creates some degree of uncertainty. I think, in that context, we will as a country want to have some conversations about infrastructure that provides greater security for us.”
Many industry experts see the threat to Canada’s economy as a wake-up call for national competitiveness, arguing to keep up the momentum following the long-awaited completion of two massive pipelines across British Columbia over the last 18 months. Both of which took more than a decade to build amidst political turmoil, regulatory hurdles, activist opposition and huge cost overruns.
On May 1, 2024, the Trans Mountain pipeline expansion (TMX) started delivering crude oil to the West Coast, providing a much-needed outlet for Alberta’s growing oil production.
Several months before that, TC Energy finished work on the 670-kilometre Coastal Gaslink pipeline, which provides the first direct path for Canadian natural gas to reach international markets when the LNG Canada export terminal in Kitimat begins operating later this year.
TMX and Coastal GasLink provide enormous benefits for the Canadian economy, but neither are sufficient to meet the long-term growth of oil and gas production in Western Canada.
More oil pipeline capacity needed soon
TMX added 590,000 barrels per day of pipeline capacity, nearly tripling the volume of crude reaching the West Coast where it can be shipped to international markets.
In less than a year, the extra capacity has enabled Canadian oil production to reach all-time highs of more than five million barrels per day.
More oil reaching tidewater has also shrunk the traditional discount on Alberta’s heavy oil, generating an extra $10 billion in revenues, while crude oil exports to Asia have surged from $49 million in 2023 to $3.6 billion in 2024, according to ATB analyst Mark Parsons.
With oil production continuing to grow, the need for more pipeline space could return as soon as next year, according to analysts and major pipeline operators.
Even shortly after TMX began operation, S&P Global analysts Celina Hwang and Kevin Birn warned that “by early 2026, we forecast the need for further export capacity to ensure that the system remains balanced on pipeline economics.”
Pipeline owners are hoping to get ahead of another oil glut, with plans to expand existing systems already underway.
Trans Mountain vice-president Jason Balasch told Reuters the company is looking at projects that could add up to 300,000 barrels per day (bpd) of capacity within the next five years.
Meanwhile, Canada’s biggest oil pipeline company is working with Alberta’s government and other customers to expand its major export pipelines as part of the province’s plan to double crude production in the coming years.
Enbridge expects it can add as much as 300,000 bpd of capacity out of Western Canada by 2028 through optimization of its Mainline system and U.S. market access pipelines.
Enbridge spokesperson Gina Sutherland said the company can add capacity in a number of ways including system optimizations and the use of so-called drag reducing agents, which allow more fluid to flow by reducing turbulence.
LNG and electricity drive strong demand for natural gas
Growing global demand for energy also presents enormous opportunities for Canada’s natural gas industry, which also requires new transportation infrastructure to keep pace with demand at home and abroad.
The first phase of the LNG Canada export terminal is expected to begin shipping 1.8 billion cubic feet of gas per day (Bcf/d) later this year, spurring the first big step in an expected 30 per cent increase in gas production in Western Canada over the next decade.
With additional LNG projects in development and demand increasing, the spiderweb of pipes that gathers Alberta and B.C.’s abundant gas supplies need to continue to grow.
TC Energy CEO Francois Poirier is “very bullish” about the prosect of building a second phase of the recently completed Coastal GasLink pipeline connecting natural gas in northeast B.C. to LNG terminals on the coast at Kitimat.
The company is also continuously expanding NGTL, which transports about 80 per cent of Western Canada’s production, with more than $3 billion in growth projects planned by 2030 to add another 1 Bcf/d of capacity.
Meanwhile Enbridge sees about $7 billion in future growth opportunities on its natural gas system in British Columbia.
In addition to burgeoning LNG exports from Canada, the U.S. and Mexico, TC Energy sees huge potential for gas to continue replacing coal-fired electricity generation, especially as a boom in power-hunger data centres unfolds.
With such strong prospects for North America’s highly integrated energy system, Poirier recently argued in the Wall Street Journal that leaders should be focused on finding common ground for energy in the current trade dispute.
“Our collective strength on energy provides a chance to expand our economies, advance national security and reduce global emissions,“ he wrote in a Feb. 3 OpEd.
“By working together across North America and supporting the free flow of energy throughout the continent, we can achieve energy security, affordability and reliability more effectively than any country could achieve on its own.”
-
Courageous Discourse2 days ago
Zelensky Met with Dems Before He Met President Trump
-
Business2 days ago
Federal government could save $10.7 billion this fiscal year by eliminating eight ineffective spending programs
-
conflict1 day ago
Is Ukraine War a Money-Sucking Charade?
-
Alberta20 hours ago
Former Chief Judge of Manitoba Proincial Court will lead AHS third-party investigation into AHS procurement process
-
Daily Caller12 hours ago
All Epstein Files Are In, Attorney General Reveals What Will Go Public Starting Thursday
-
Business21 hours ago
Tariffs by Tuesday: Trump Says There Is ‘No Room Left’ For Any Negotiations On Postponing Tariffs On Mexico, Canada
-
International2 days ago
DataRepublican Exposes the Shadow Government’s Darkest Secrets
-
International23 hours ago
Pope Francis has two episodes of ‘acute respiratory failure’ in hospital today