Just as Wall Street says the U.S. is running out of room to store oil, it turns out there’s another 20 million barrels of empty space.
Where? Right at the top of the tanks.
A supply glut has dragged U.S. crude for May delivery almost $10 a barrel below contracts a year out. This market structure, known as contango, has encouraged traders to shove the most oil in 80 years into storage so they can sell it for more in the future. The problem is, tanks are filling up, according to banks from Bank of America Corp. to Citigroup Inc. and Goldman Sachs Group Inc.
That’s where the extra space comes in. There’s the normal “working” capacity. And then there’s “contingency” space, a buffer between the working storage and the tank tops that typically sits empty to keep oil from spilling out. The company that built most of the tanks at Cushing, Oklahoma, the biggest U.S. oil hub, says the buffer is about 3 to 5 percent of storage space. That’s equivalent to about 20 million barrels of room in tanks across the country.
“Their sole orientation is capturing the contango, and they’re pushing it as much as possible,” Rashed Haq, vice president at consultant Sapient Global Markets, who worked with a trader in November to model the use of his contingency space, said by phone March 17. “The difference between the working capacity and the tank top could be 1 percent, but that’s 1 percent of margin. That’s pure profit. That’s in the millions.”
Traders’ attempts to use every cubic inch of storage underscores how desperate the market has become to stow oil. Supplies at Cushing reached a record 54.4 million barrels as of March 13, Energy Information Administration data show. Nationwide, stockpiles at 458.5 million are the highest since 1930.
Large inventory builds are increasing the risk of prices heading lower if storage capacity is breached, Goldman Sachs said in a March 20 research note. Supplies are likely to continue toward tank tops, Citigroup said Feb. 9.
West Texas Intermediate crude for May delivery was at $47.33 a barrel on the New York Mercantile Exchange on Wednesday. The May 2016 contract was at $56.98 a barrel.
“We are close to full,” Francisco Blanch, global head of commodities at Bank of America Merrill Lynch, said in a March 19 interview on Bloomberg radio.
The EIA doesn’t quantify the space sitting at the top of tanks. Operators set their own levels of contingency, so there is no single standard, Michael Conner, a statistician at the agency, said by phone from Washington March 18.
The amount of space is based on an operator’s shutdown procedures, said Ken Erdmann, head of Matrix PDM Engineering, a division of Tulsa, Oklahoma-based Matrix Service Co., which has been building tanks at Cushing since the mid-1990s. When use of contingency space is required, factors including how fast the tank is filled and how closely the liquid level is being monitored can allow the operator to slow down the flow into the tank to create more available space, he said.
“If you reduce fill rates, then the volume you have to set aside for contingency space can also be reduced, although it can’t typically go below 1 percent,” Erdmann said by phone March 20.
Magellan Midstream Partners LP, which owns 12 million barrels of storage in Cushing, can eke out more space by filling one tank with a high-flow pipeline and then transferring that oil to others using slower lines, Bruce Heine, a spokesman for Tulsa, Oklahoma-based tank owner, said by e-mail March 19. Those who fill their tanks to the brim risk damaging their floating rooftops and spilling oil out through vents, he said.
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