U.S. President Donald Trump's proposal to sell half of the U.S.’s strategic oil reserve surprised energy markets on Tuesday since it counters OPEC's efforts to control supply in order to boost prices.

The White House requested in its budget released late on Monday gradually selling off the nation's Strategic Petroleum Reserve (SPR) starting in October 2018 to raise US$16.5 billion. The U.S. SPR holds 688 million barrels, making it the world's largest reserve, and a release of half over 10 years averages about 95,000 barrels per day (bpd), or 1 per cent of current U.S. output.

The plan came out just a day after Trump left Saudi Arabia, the de-facto leader of the Organization of the Petroleum Exporting Countries (OPEC), as part of his first overseas trip.

The U.S. has more leeway to release the SPR crude as its own production has surged 49 per cent over the past five years. But the move undermines OPEC's efforts to tighten global oil markets by cutting their output this year and likely into 2018.

"It will complicate the OPEC efforts to stabilize the market," said Anas Alhajji, an independent oil analyst and economist in the Reuters Global Markets Forum following the announcement.

The announcement pulled down front-month crude futures prices.

However, the budget is not fixed since Congress has the final say and has rejected many White House proposals in the past.


Following the oil shocks of the 1970s after the Arab oil embargo, members of the Organisation for Economic Co-operation and Development (OECD) started building SPR sites to hold the equivalent to 90 days' worth of a country's daily demand.

The U.S. released supplies from the SPR amid supply concerns at the start of the Gulf War in 1991 and after Hurricane Katrina disrupted Gulf of Mexico output in 2005, and again 2011 amid concerns about lost Libyan supply.

In December, Congress approved the sale of US$2 billion of crude from the SPR to pay for maintenance and repairs. The U.S. Department of Energy sold 6.4 million barrels in January and another 10 million in February.

The White House proposal would also open areas of Alaska's arctic region to exploration. That could raise production above 10 million bpd, up from 9.3 million bpd currently, putting the U.S. in competition with Saudi Arabia and Russia for the world's biggest oil producer.

Analysts say that soaring U.S. shale output is the reason for the greater security in its supply.

"The U.S. has likely become more sanguine when it comes to having a very large SPR holding, given lofty medium term forecasts for the Permian basin," said Virendra Chauhan, oil analyst at consultancy Energy Aspects, referring to a large U.S. shale oil field.