A tender for developing Iran's Azadegan oilfield has been delayed, a senior oil official was quoted as saying in a media report.

"The companies are still assessing the technical surveys. The tender will not take place in 2017," managing director of the National Iranian Oil Company (NIOC) Ali Kardor was quoted in an Iran Daily report.

Iran said in June that international energy companies including France's Total, Malaysia's Petronas and Japan's Inpex have presented technical studies on the development of the Azadegan field for the tender.

Tehran is looking to increase its crude output, and with 37 billion barrels of oil, the Azadegan field is Iran's largest, shared with Iraq, the report said, citing Reuters.

Kardor added that the Chinese, Russian and European companies were still committed to investing in Iran.