I did some searching and found few interesting data points:
>For dozens of oil producers, the plunge in oil prices is devastating. No major oil producer can balance its budget at prices below $40; according to the International Monetary Fund, with the exception of Qatar, every country in the Middle East requires at least $60, with Algeria at $157 and Iran at a whopping $390. The average Brent price of oil over the past month has been a hair above $20. [1]
and this from 2019:
>Top oil exporter Saudi Arabia would need oil priced at $80-$85 a barrel to balance its budget this year, an International Monetary Fund official said. [2]
Given that WTI is at $19 and Arab Light at $21, there's going to be lots of internal changes in ME in the coming years. Probably a few wars too.
[1] https://www.bloomberg.com/opinion/articles/2020-04-29/covid-...
[2] https://www.reuters.com/article/us-saudi-economy-imf/saudi-a...