Oil minister Bijan Zanganeh handed the running of Iran's national oil company to a trusted ally in a push to agree to long-awaited deals with global oil majors, which could be derailed by next year's presidential polls.

Iran has pledged to open up its lucrative oil reserves, which are the world's fourth-largest, although hardline rivals of reformist President Hassan Rouhani have opposed the new contracts, saying Iranian natural resource reserves cannot be owned by foreigners.

The new deals, known as Iran Petroleum Contracts (IPCs), follow the lifting of Western sanctions in January and would end a system dating back more than 20 years under which foreign firms were banned from owning stakes in Iranian companies.

During the week of June 20, Iran selected several local firms which can become partners of Western oil companies; and on June 27, Zanganeh pledged to tender 10 to 15 fields under new deals as early as this summer. Oil majors insist these must be more attractive than the loss-making contracts of the 1990s.

The change follows the appointment, in June, of Zanganeh's trusted ally, Ali Kardor, as head of the National Iranian Oil Co. (NIOC), replacing Rokneddin Javadi, who had held the post since 2013 and who has become deputy oil minister for supervising hydrocarbon resources.

Iranian and industry sources said the NIOC reshuffle is aimed at boosting oil exports and getting some deals in place ahead of Iran's 2017 presidential election as an internal political power struggle intensifies.

"There has been a lot of pressure on Zanganeh for not doing much to bring new oil investments as quickly as promised and until now, the new contracts are still being drafted," said the oil executive.

Kardor, who was earlier NIOC's director of investment and financing, is "one of Zanganeh's old guard," according to a senior non-Iranian oil executive with close contacts to Iran.

Because of his background in finance, Kardor's appointment is meant to show that Zanganeh is serious about attracting much-needed oil investments quickly, sources told Reuters.

Two Years Of Delays

Iran's new oil and gas contracts are a cornerstone of its plans to raise crude production to pre-sanctions levels of 4 million barrels per day (MMbbl/d), and the OPEC member has said it needs $200 billion in foreign money to reach the goal.

Iran sits on the world's fourth-largest oil reserves, just behind Venezuela, Saudi Arabia and Canada.

But the domestic infighting over the structure and commercial terms of the new oil and gas development contracts has caused several delays in tendering them. Plans for a London conference to present them have been delayed by almost two years.

Tehran's oil sales have nearly doubled since December, with companies such as Royal Dutch Shell Plc (NYSE: RDS.A) and Total resuming purchases, despite the absence of upstream deals.

"We haven't seen anything. Nothing at all which would indicate that work on contracts is progressing," a top executive of a major Western oil company with a long history of dealings with Iran said.

"And to be honest, I'm not very concerned about it, as my ability to invest in new projects is severely restricted at the moment by low oil prices," he added.

Others dismissed the chances of Zanganeh's changes speeding up new deals before the mid-2017 presidential election.

"The energy sector in Iran is more linked to politics than any other country," said an Iranian industry source. "I don't think we will see anything happening this year or next year."