Thinking back to the 250b x2, I found this in wikipedia article.

In 2012, Iran, which exports around 1.5 million barrels of crude oil a day, was the second-largest exporter among the Organization of Petroleum Exporting Countries.[9] In the same year, officials in Iran estimated that Iran's annual oil and gas revenues could reach $250 billion by 2015.[10] However, the industry was disrupted by an international embargo from July 2012 through January 2016.[11][12] Iran plans to invest a total of $500 billion in the oil sector before 2025.

https:// en.wikipedia.org/wiki/Petroleum_industry_in_Iran