KEY POINTS
  • "Should the nuclear deal be revived, 1-2 million barrels per day of extra oil could hit the market in a comparatively short period of time," one commodities analyst told CNBC.
  • Iranian negotiators in mid-August expressed optimism about the prospects for an agreement, with one advisor saying "we're closer than we've been before" to securing a deal.
  • But so far, it seems there are a few remaining sticking points that are proving difficult to resolve.
A gas flare on an oil production platform is seen alongside an Iranian flag in the Gulf.

The return of the Iran nuclear deal could be imminent — and with it, the return of a lot of oil to international crude markets. 

Before the U.S. resumed sanctions on Iran after former President Donald Trump left the deal in 2018, Iran was the third-largest producer in OPEC after Saudi Arabia and Iraq. In 2017, it was the fourth-largest oil producer in the world, after the U.S., Saudi Arabia and Russia.