The production volume in 2021 of residual fuel oil, or heavy fuel oil, in Iran was roughly 140 thousand barrels. This was the biggest increase in production after recording two consecutive years of production decline, and hitting an all-time low of approximately 136.5 thousand barrels of production in the previous year.
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Production volume of residual fuel oil in Iran from 2017 to 2021
(in thousand barrels)
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US Geological Survey, & OPEC. (March 31, 2024). Production volume of residual fuel oil in Iran from 2017 to 2021 (in thousand barrels) [Graph]. In Statista. Retrieved July 04, 2025, from https://www.statista.com/statistics/1488752/iran-residual-fuel-oil-production/
US Geological Survey, und OPEC. "Production volume of residual fuel oil in Iran from 2017 to 2021 (in thousand barrels)." Chart. March 31, 2024. Statista. Accessed July 04, 2025. https://www.statista.com/statistics/1488752/iran-residual-fuel-oil-production/
US Geological Survey, OPEC. (2024). Production volume of residual fuel oil in Iran from 2017 to 2021 (in thousand barrels). Statista. Statista Inc.. Accessed: July 04, 2025. https://www.statista.com/statistics/1488752/iran-residual-fuel-oil-production/
US Geological Survey, and OPEC. "Production Volume of Residual Fuel Oil in Iran from 2017 to 2021 (in Thousand Barrels)." Statista, Statista Inc., 31 Mar 2024, https://www.statista.com/statistics/1488752/iran-residual-fuel-oil-production/
US Geological Survey & OPEC, Production volume of residual fuel oil in Iran from 2017 to 2021 (in thousand barrels) Statista, https://www.statista.com/statistics/1488752/iran-residual-fuel-oil-production/ (last visited July 04, 2025)
Production volume of residual fuel oil in Iran from 2017 to 2021 (in thousand barrels) [Graph], US Geological Survey, & OPEC, March 31, 2024. [Online]. Available: https://www.statista.com/statistics/1488752/iran-residual-fuel-oil-production/