The Qaleh-Nar, Kaboud, and Balaroud Skid-Mounted Crude Oil Processing Unit (SOPU) Project is an 11-year BOO (Build, Operate, Own) contract signed in 2024 between OGDC and the National Iranian Oil Company. The oil processing units are designed for the primary refining and processing of crude oil. Since the crude oil produced from oil wells contains various compounds (water, associated gases, H2S, salt, etc.), these impurities must be separated from the oil to prevent corrosion and wear of oil facilities and to meet the acceptable specifications for crude oil export. This process ensures that the crude oil can be converted into higher value-added products at oil refineries.

Skid-Built is a type of construction method for facilities, including oil and gas installations, that replaces traditional Stick-Built methods. This approach aims to reduce construction time and enhance the mobility of these facilities. In this method, a significant portion of the equipment and unit construction is modularly pre-fabricated in factories and installed on various skids, which are then tested. After transportation, each skid can be rapidly installed and easily connected to others, enabling early oil processing in oil fields.

The location of this project is the Qaleh-Nar oil field, located in Khuzestan Province, 30 kilometers north of Andimeshk. This project involves the engineering, procurement, construction, commissioning, operation, and maintenance of a skid-mounted unit with a capacity of 40,000 barrels per day, requiring an estimated capital expenditure of approximately $102 million. The processing units within these facilities include separation, oil sweetening, desalting, storage, and oil transportation.