Currently the world supply for excess crude production ranges between 2-30 days depending on the country/region. As demand diminishes the wells are producing way more than demand and the space to store it is running low and conceivable run out. Restocking the strategic reserve seems to be a small fix to that issue...at least as afar as storage in the US and the oil was purchased at a low market price.
Apparently Oil buyers and sellers are looking to lease tankers to store crude as the land storage is being filled and/or spoken for with long term leases.
Even more of an issue for oil refiners is the excess jet fuel and to a lesser degree gasoline. Those can't be stored in the same tanks that held crude oil. AND the jet fuel and gasoline stocks degrade faster than crude.
An interesting thing to watch when everything comes to an almost grinding halt.