Strategic Petroleum Reserve

A Strategic Petroleum Reserve (SPR) is an emergency stockpile of crude oil held by a national government (or in some cases a regional bloc) to be released during severe supply interruptions. The concept emerged after the 1973 Arab oil embargo exposed the vulnerability of industrialized economies to sudden cutoffs in Middle Eastern crude.

The best-known reserve is the United States Strategic Petroleum Reserve, authorized by the Energy Policy and Conservation Act of 1975 and managed by the Department of Energy. It stores crude in underground salt caverns along the Gulf Coast in Texas and Louisiana, and is the largest emergency oil stockpile in the world. The U.S. SPR has been tapped during the 1991 Gulf War, after Hurricane Katrina in 2005, during the 2011 Libyan civil war (as part of a coordinated International Energy Agency release), and most notably in 2022, when the Biden administration announced a release of 180 million barrels in response to price spikes following Russia's invasion of Ukraine.

Beyond the U.S., International Energy Agency (IEA) member states are required to hold petroleum stocks equivalent to at least 90 days of net imports, a commitment dating to the agency's founding in 1974. Major holders include Japan, Germany, South Korea, and the Netherlands. China has been building its own state reserve since the mid-2000s, though official data on volumes is limited. India maintains smaller reserves at sites such as Visakhapatnam, Mangalore, and Padur.

SPRs serve several overlapping functions:

• Physical supply insurance against embargoes, conflict, or natural disasters
• Price stabilization, though economists debate how effective releases are at moving global benchmarks
• Diplomatic leverage, since coordinated releases can signal political resolve

Critics argue that reserves are sometimes used for short-term political reasons rather than genuine emergencies, and that drawdowns leave countries more exposed to future shocks. Refilling reserves at higher prices than the sale price is also a recurring fiscal concern.