U.S. crude stockpiles, including Gulf Coast inventories, rose last week to their highest since September 2017 as production set a new record high, imports rose while refining rates fell, the Energy Information Administration (EIA) said May 1.
Gasoline stockpiles also increased unexpectedly after 10 weeks of drawdowns, while distillate inventories fell, the EIA said in its weekly report.
Crude inventories rose 9.9 million barrels in the week to April 26 to 470.6 million, compared with analysts' expectations in a Reuters poll for an increase of 1.5 million barrels.
The steep build was led by an increase in the Gulf Coast region, where inventories rose 9.2 million barrels to 244.6 million barrels, both the biggest weekly build and the highest level since September 2017, the data showed.
“To say that this increase in supply is shocking is an understatement," said Phil Flynn, an analyst at Price Futures Group in Chicago. "The barrels in the Gulf Coast are just huge and mind-numbing.”
Oil prices extended losses after the bearish report, with West Texas Intermediate (WTI) crude dropping by more than $1 to a session low of $62.89 a barrel, before paring losses slightly to $63.20 a barrel by 10:27 a.m. CDT (1527 GMT).
Crude stocks at the Cushing, Okla., delivery hub for WTI rose by 265,000 barrels, the EIA said.
Net U.S. crude imports rose last week by 335,000 barrels per day (bbl/d) to 4.8 million bbl/d, the highest rate since January, while crude production edged up 100,000 bbl/d to a new weekly record high at 12.3 million bbl/d.
A drop in refining activity and increased imports contributed to the build, said Matthew Smith, director of commodity research at ClipperData.
"The vast majority of the build was on the U.S. Gulf Coast—with refinery runs ticking lower and waterborne imports on the rise," he said.
Refinery crude runs fell by 137,000 bbl/d as utilization rates fell by 0.9 percentage point to 89.2% of total capacity, the EIA data showed.
Gasoline stocks rose by 917,000 barrels, compared with analysts' expectations for a 1 million-barrel drop.
Distillate stockpiles, which include diesel and heating oil, fell by 1.3 million barrels, vs. expectations for a 193,000-barrel drop, the EIA data showed.
As traders study the U.S.-China trade tiff, the oil price rise is tepid and NGL prices plummet.
Weak natural gas price results in expanded margins even as most NGL prices move little.
Overall crude oil stocks, not including the U.S. Strategic Petroleum Reserve, fell to 466.6 million barrels from their highest levels in 19 months.