The SPR is a petroleum piggy bank, primarily meant for the US Military or strategic US industries during an oil supply crisis, especially during a time of war.
Alas, the SPR is now used as a gimmick to mask the full effects of the Greens' sanctioning of the US domestic energy industry in the lead up to the 2022 midterm elections.
Biden thinks it's okay to buy oil from Iran, Venezuela, and Saudi Arabia to save the Dem 2022 midterms, but it's forbids getting more oil from Alaska, Texas, North Dakota, etc.