France’s Total and China’s CNPC are seeking stakes in a $4 billion project in Iran's giant South Pars gas field.

If finalized, Total would operate the project with a 50.1 percent stake, CNPC would own 30 percent through one of its subsidiaries and Iran's Petropars would have 19.9 percent.

Total is seeking a 50 percent stake, the French energy firm said in a regulatory filing on Friday detailing talks held with Iranian officials on several projects in 2016.

Total signed a preliminary deal for the South Pars project last year, becoming the first Western oil major to sign an energy agreement after the European Union and the United States eased sanctions on Iran.

In a filing to the U.S. Securities and Exchange Commission, Total said the South Pars 11 project would require investment of about $4 billion, with the French firm financing 50.1 percent with equity contributions and payments in non-U.S. currency.

Total had not previously given details about the value of the project or indicated the breakdown of ownership.

South Pars is part of a Persian Gulf reservoir that is one of the biggest gas fields in the world.

The South Pars project is expected to have a production capacity of 370,000 barrels of oil equivalent per day and the gas would be fed to the Iranian grid. It would require two offshore platforms and 30 wells.

Total is expected to make a final investment decision by summer although this would depend on a renewal of U.S. sanctions waivers, Total CEO Patrick Pouyanne said in February. Iran said contracts would be finalized around April.

Total said in its filing that it discussed other projects with Iranian officials in 2016 and carried out technical reviews, including for investment in a 10 million ton-per-year liquefied natural gas (LNG) plant at Tombak on the Persian Gulf coast.

In February, sources said Total was in talks to buy a stake in the partly-built LNG plant at the port.

The French firm also said in its filing that it discussed plans to invest in the South Azadegan oil field.

Total said it resumed trading with Iran in February 2016, and bought about 50 million barrels of crude for about $1.9 billion last year, most of it to supply its refineries.

It also purchased 11 million barrels of petroleum products for $394 million, generating net profit of $2.8 million.

The company also said it was selected alongside other companies to consult on a potential oil and gas pipeline between Iran and Oman.

(Source: Reuters)