Mainline pipeline moves about 3 MMbbl/d of western Canadian oil.
President Donald Trump on April 29 said his administration will soon release a plan to help U.S. oil companies, which Treasury Secretary Steven Mnuchin said could include adding millions of barrels of oil to already-teeming national reserves.
Administration tries to help oil industry deal with low prices.
U.S. WTI crude futures settled at $15.06/bbl, jumping $2.72, or 22%. Brent crude futures settled at $22.54/bbl, up $2.08, or 10.2%.
Storage in the two terminals now totals about 12 MMbbl.
Oil traders are hiring expensive U.S. vessels, normally only used for domestic shipments, to store gasoline or ship fuel overseas, five shipping sources said.
Even as governments worldwide are taking tentative steps towards reducing restriction on movement to help economies rebound, oil demand remains weak.
Logistical issues and doubts about maintaining the quality of the oil make producer skeptical of the plan.
10-year deal will allow Australia to stockpile crude and eventually increase storage in the country.