There’s two types of charts.
One kind shows the cost of producing the oil... the one I saw from Morgan Stanley said Saudi was around an average of $27/barrel, onshore US and other ME oil around $40.
The second kind looks at the country’s budget, and how much of it is financed by oil sales. Saudi’s biggest revenue producer (suprise!) is oil. Then it calculates what price/volume they need to not run a budget deficit. That’s where the high fiscal breakeven numbers come from. Russia is another place with modest oil production costs, but high fiscal dependence on external oil and gas sales.
Got it. That makes more sense.