U.S. refinery capacity virtually unchanged between 2017 and 2018
As of January 1, 2018, U.S. operable atmospheric crude distillation capacity totaled 18.6 million barrels per day (MMbpd), a slight decrease of 0.1% since the beginning of 2017 according to EIA’s annual Refinery Capacity Report. Annual operable crude oil distillation unit (CDU) capacity had increased slightly in each of the five years before 2018.
Refinery capacity is measured in two ways: barrels per calendar day and barrels per stream day. Barrels per calendar day reflect the input that a distillation unit can process in a 24-hour period under usual operating conditions, taking into account both planned and unplanned maintenance. Barrels per stream day reflect the maximum number of barrels of input that a distillation facility can process within a 24-hour period when running at full capacity under optimal crude oil and product slate conditions with no allowance for downtime. Stream day capacity is typically about 6% higher than calendar day capacity.
The Refinery Capacity Report also includes information about secondary units—downstream refinery units that are used to process the products coming from the atmospheric crude distillation unit into ultra-low sulfur diesel and gasoline, as well as other products. Secondary refining capacity, including thermal cracking (coking), catalytic hydrocracking, and hydrotreating and desulfurization, increased slightly, up 1% from year-ago levels. These downstream capacity increases are primarily the result of changing processes that can increase refinery throughput rather than building new refining units.
The number of operating refineries decreased from 141 on January 1, 2017, to 135 on January 1, 2018, largely reflecting classification changes in EIA’s survey: four refineries previously considered separate in survey data were merged into two, and two refineries were reclassified from idle to shut down. Consequently, the decrease in the number of operating refineries does not necessarily represent a meaningful change in U.S. refinery operating capacity.
Record refinery runs have helped accommodate increases in U.S. crude oil production, which averaged 9.4 MMbpd in 2017, an increase of 4.0 MMbpd from the level in 2009. Gross crude oil inputs to refineries averaged 16.6 MMbpd in 2017 compared with 14.3 MMbpd in 2009. Over that period, operable refinery crude distillation capacity increased 945,000 Mbpd, and utilization rose from 83% in 2009 to 91% in 2017, resulting in the 2.3 MMbpd increase in gross crude oil inputs. Over the same period, U.S. crude oil imports decreased by 1.1 MMbpd, and U.S. crude oil exports increased by 1.1 MMbpd.
Principal contributors: Kelsey Hallahan, Julie Harris
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