Iranian President Hassan Rouhani formally inaugurated four new phases of South Pars, the world’s largest gas field, on March 17, according to a statement posted by the Iranian oil ministry on Twitter.

Iran has invested $11 billion to complete the four phases and they will increase the country’s gas production capacity by up to 110 million cubic meters per day (MMcm/d), the statement said.

Iranian Oil Minister Bijan Zanganeh said on Saturday that Iran, which share South Pars with Qatar, expects to operate 27 phases by next March.

Gas production at South Pars will exceed 750 MMcm/d) by late 2019, Zanganeh said on March 17, according to SHANA, the news website of the Iranian oil ministry.

Iran produced 841 MMcm/d on average in the current Iranian calendar year, which began in March 2018, Zanganeh said on March 17, according to the Mehr news agency.

Iran expects to produce 880 MMcm/d in the next year and 950 MMcm/d the following year, Zanganeh said.

France’s Total and China National Petroleum Corp (CNPC) suspended investment in phase 11 of South Pars last year after the United States threatened to impose sanctions on companies that do business in Iran.

Zanganeh said on March 16 that talks are continuing with CNPC.