Iran qualified 29 international oil companies to bid in upcoming tenders for crude and natural gas development projects as the Persian Gulf state seeks investment in energy. China National Petroleum Corp., Royal Dutch Shell Plc and Total SA are among the companies that will be invited to bid in tenders, according to a list published Monday on the website of state producer National Iranian Oil Co. Total, along with Lukoil PJSC and the oil unit of Gazprom PJSC , are some of the companies on the list that have already signed preliminary agreements with Iran to study oil fields for potential future development. Iran aims to attract more than $100 billion in foreign investment to speed growth in its energy industry after sanctions cut international companies’ involvement in developing the world’s fourth-largest oil reserves. Since sanctions eased in January, the Persian Gulf producer has doubled exports as crude prices […]