Upstream oil sands GHG emissions are expected to continue to fall in the coming years. According to a report by IHS Markit, by 2030, greenhouse gas emissions in the oil sands are expected to fall 30 per cent below 2009 levels. Cenovus photo.
Some oil sands GHG emissions are at or near average US levels
The emissions intensity of upstream Canadian oil sands production will continue to decline in coming years, falling to 30 per cent below 2009 levels by 2030, according to a report by IHS Markit.
The report, entitled “Greenhouse Gas Intensity of Oil Sands Production: Today and In the Future,” examines the past and future greenhouse gas (GHG) intensity of upstream oil sands production emissions in great detail.
It includes an historical assessment of emissions intensity by year from 2009-2017 as well as an outlook for future emissions trends from 2018-2030.
The study found that over the last near-decade (2009-2017), upstream oil sands GHG emissions intensity (GHG per barrel produced) fell 21 per cent and could fall by an additional 16 to 23 per cent over the coming decade.
“The Canadian oil sands have a demonstrated track record of lowering emissions intensity,” said Kevin Birn, executive director, IHS Markit, who heads the Oil Sands Dialogue. “This study shows that trend will continue into the future with additional reductions expected across the major forms of oil sands production.”
From 2009-2017, oil sands mining operations were the primary source of upstream emissions reductions. The average intensity of oil sands mining operations fell 26 per cent on a marketed product basis during this time, a result of historical improvements and the introduction of newer, less-GHG intensive mining operations, the report said. Improvements are expected to continue, with an additional 15 to 20 per cent reduction between 2017-2030.
Elsewhere, Steam-assisted Gravity Drainage (SAGD)—the production method expected to account for three-quarters of oil sands growth to 2030—will also be a key driver of the future GHG intensity declines, the report says.
SAGD emissions are expected to fall 17 to 27 per cent during the 2017-2030 period. Lower steam intensity arising from steam displacement technologies, as well as better use of natural gas from improvements in well productivity and steam generation, are key contributors to the IHS Markit outlook.
“SAGD is still a relatively new process and has yet to undergo any of the transformational changes that occurred in mining,” Birn said. “The majority of emissions intensity reductions to date have come from incremental improvements and learning by doing. However, the analysis here shows that even a modest set of advancing individual improvements working together could result in more dramatic reductions.”
Overall, there is potential for the GHG reductions to exceed the report’s expectations, Birn said.
“This report could very well be a conservative estimate,” he said. “We intentionally excluded any transformational technologies under development in the oil sands and only factored for the deployment of commercial or near-commercial technologies or efficiencies, only existing trends.”
While the new IHS Markit report focuses exclusively on upstream operations and did not assess the full life-cycle emissions (the entire life of the fuel from upstream production through the combustion), the report does extrapolate preliminary life cycle estimates by drawing on previous IHS Markit research of life-cycle GHG intensity.
Emissions intensity of SAGD was lower than previous assessments with the most efficient operations already operating near the U.S. average. Mined SCO emissions were nearly identical to prior assessments, while mined dilbit—which did not start until 2013—is expected to move to be on par with the U.S. average over time.
The report also notes the high degree of project-by-project variability in oil sands GHG intensity and cautioned against overgeneralization of industry averages.
According to the report, oil sands GHG intensity in 2017 ranged from 39 kilograms (kg) of carbon dioxide equivalent (CO2e) per bbl to 127 kgCO2e/bbl). When placed on a full life-cycle basis that equates to 1 per cent below to 16 per cent above the average crude oil refined in the United States.
“Oil sands facilities are diverse and so are their emissions. A focus solely upon the average may lead to over generalizations and may not represent the reality of any one individual operation,” Birn said. “There are some operations today that appear to be at or near the U.S. average already.”