Tecnicas Reunidas, Saipem, and Samsung E&C are the primary contenders for a contract from Saudi Aramco for the construction of natural gas facilities in Haradh and Hawiyah, Reuters reports.

The companies submitted bids to increase the capacity of the Hawiyah gas plant and to construct compressor stations at both Haradh and Hawiyah.

Tecnicas Reunidas submitted the lowest bid, sources told Reuters.

The project is expected to cost $4 billion dollars and will nearly double the natural gas processing capacity of the Hawiyah plant from 1.3 billion standard cubic feet per day (bscf/d) to 2.5 bscf/d, Reuters reports.

Hyundai Development Company Engineering & Construction (HDEC), GS Engineering and Construction, Shandong Electric Power Construction Corporation (SEPCO), Larsen and Toubro (L&T), and Petrofac also submitted bids for the project, Reuters reported in August.

Saudi Arabia is seeking to decrease its dependence on oil as part of its Vision 2030 plan. As part of the plan, the country is seeking to increase its reliance upon natural gas for its energy needs, Reuters previously reported. Officials plan to increase the share of energy produced from natural gas from 50% to 70%.

Hawiyah and Hardh are located in the Ghawar oilfield in eastern Saudi Arabia.