How the Strategic Petroleum Reserve Works
10 hours ago
- The US Strategic Petroleum Reserve (SPR) is the world's largest crude oil storage facility, created after the 1973 oil embargo to protect against supply disruptions.
- The SPR is stored in solution-mined salt caverns along the Texas-Louisiana Gulf Coast, chosen for cost-effectiveness and proximity to oil infrastructure.
- Construction faced significant challenges, including management inexperience, fraud, cost overruns, and delays, with initial capacity goals not met until the 1990s.
- Caverns have a finite lifespan due to salt dissolution and creep; they can only be emptied a limited number of times before structural damage risks increase.
- There is no officially documented minimum fill level for cavern safety beyond a small amount of 'roof oil' (about 12 million barrels), despite various expert claims ranging from 70 to 300 million barrels.
- Operational limits include reduced withdrawal rates as caverns empty, maintenance backlogs, and vapor pressure issues that restrict oil distribution in warmer months.