Statoil operates oil sands production facilities primarily in Canada. It said its oil sands production declined "slightly" last year.
The company said CO2 intensity should decrease as it introduces additional technology at its Leismer oil sands operations in Alberta, Canada. There may be spikes in the interim, however.
The Norwegian company said in a report Tuesday about 69.7 kilograms of CO2 were produced per barrel of oil. That was higher than expected, the company said, but lower than the 72.7 kg of CO2 per barrel produced in 2011.
"Our long-term CO2 targets for reduced carbon dioxide intensity in the production process, with 25 percent by 2020 and 40 percent by 2025, remain firm," Stale Tungesvik, Statoil's manager in Canada, said in a statement.
Tungesvik said Statoil was looking at more than a dozen different technologies it may test long-term in an effort to curb CO2 emissions from its oil sands operations in Canada.
Statoil said Leismer is producing around 20,000 barrels of oil per day.