It's crunch time for OPEC as oil prices rise

(CNN Money) — Oil prices have surged and a potential supply crunch looms. Will OPEC respond?

Members of the oil cartel are meeting Friday (U.S. time) in Vienna to consider a potential production increase that would please its customers and help bring down prices.

The summit promises to be a tense affair. Saudi Arabia has pushed for the cartel and its partners, such as Russia, to increase supply by around 1 million barrels per day.

Nervous investors pushed U.S. crude futures up 1.3% to around $66.30 per barrel on Friday over concerns a deal won't be reached because of resistance from Iran.

Oil prices have spiked by as much as 20% this year, in part because OPEC and its allies have produced even less than was foreseen under a 2016 agreement that was supposed to reduce supply by 1.8 million barrels per day.

The price spike has caused pain for big energy consumers such as India. American drivers are paying more for gas, too.

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OPEC must still work out details of how any production increase would be carried out. The details are tricky because some countries — such as Venezuela — can't pump more.

"Bottom line is, they are going to add [production] volume," Fereidun Fesharaki, chairman of oil and gas consulting firm FGE, said on Thursday. But the specifics still need to be negotiated, he said.

Fesharaki predicted that OPEC will announce a production increase of roughly 1 million barrels per day, but only 600,000 barrels or 700,000 barrels would materialize because some countries would struggle to meet their quotas.

Saudi Energy Minister Khalid Al-Falih said Friday that a similar scenario was under discussion.

"I am sure we will come to consensus, and we will look back at this meeting as being equally important to the one we had in late 2016 when we decided ... to bring stability back to the market," he said on Thursday.

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Al-Falih has argued that the cartel should act now in order to keep its customers happy.

Iran said earlier this week that OPEC should stick to the terms of its original production cut agreement. The country, which is facing US sanctions that could hamper its production, has the power to veto any deal on Friday.

Asked ahead of the summit on Friday whether he would support a deal to increase production, Iranian oil minister Bijan Zangeneh said that "we are cooking something new" to reach a "compromise."

But he did not provide specifics.

Fesharaki said he still expects an agreement to be reached.

"I think the Iranians will yield," he said. "I don't think anyone wants to walk away in a huff."

Sticking more exactly to the 2016 agreement would mean an increase in supply, but it would be less than Saudi Arabia says the market needs.

This story was first published on CNN.com, "It's crunch time for OPEC as oil prices rise."