The strategic petroleum reserve has been decreasing since the closure of the Strait of Hormuz.
It is now at 349 million barrels (compared to 415 million pre-war).
When it will first see a week-on-week increase?
This market resolves based on the values officially reported by EIA - currently at https://www.eia.gov/petroleum/supply/weekly/ under "Petroleum Balance Sheet".
Directly at https://www.eia.gov/petroleum/supply/weekly/pdf/table1.pdf (will update if the source changes).
Market resolves based on the date on the report that first reports a weekly increase (reports are typically published with a few days delay).