Commercial crude oil inventories in Cushing, Oklahoma (located in
Petroleum Administration for Defense District 2) and the U.S. Gulf Coast
(PADD 3) totaled a record-high 309.4 million barrels as of the week
ending November 27. Based on the recently released storage capacity and
line fill data in the September Petroleum Supply Monthly(PSM), EIA
estimates 70.2% utilization of working crude oil storage capacity in
Cushing and the Gulf Coast on a combined basis, only slightly below the
record utilization level of 71.2% set in the week ending April 24 of
this year.
The U.S. Gulf Coast region contains 55% of the nation’s crude oil
storage capacity, and Cushing contains another 13%. As of the week
ending November 27, these two locations contained 67% of the nation’s
crude oil inventories. They are also home to most of the growth in crude
oil storage capacity over the past four and a half years. Since March
2011, the Gulf Coast and Cushing have accounted for about 85% of the
nation’s increase in crude oil storage capacity, growing by 55.7 million
barrels and 25.0 million barrels, respectively.
Although storage utilization levels along the Gulf Coast and at
Cushing are often assessed separately, their combined utilization is
currently most relevant given the increased pipeline capacity to move
crude oil south from Cushing to the Gulf Coast during a time of high
global crude oil inventory builds. Despite relatively high crude oil
inventories and storage capacity utilization, there are still more than
100 million barrels of capacity available in these two areas. More
information about the interplay between crude oil storage patterns and
financial markets is available in This Week in Petroleum.
EIA has published net available shell and working crude oil storage
capacity data in the March and September PSM releases since September
2010. However, until recently, calculating an effective utilization rate
for this capacity was difficult. Simply dividing EIA’s total commercial
inventories by working capacity overestimated utilization because the
inventory data include some crude oil not stored in tanks, such as that
held in pipelines (pipeline fill). As of the March 2015 release, EIA now
publishes more granular data indicating estimated pipeline fill,
improving the utilization calculation. Total working capacity is often
the best measure of total available storage since it excludes tank
bottoms and contingency space.
Source: EIA
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