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Gas Processing & Compression Plant

The Gas Processing and Compression Plant at Qatar’s Ras Laffan Industrial City, the largest single build plant in the world, is central to Dolphin’s activities and makes up the core element in its operations.

The raw gas processing includes removal of hydrogen sulfide and other impurities. Extraction of valuable by-products for international sale is then undertaken and the resulting refined methane gas is compressed for supply to the UAE through the Export Pipeline.

When the gas is cleaned, mercury and other impurities are removed – as well as acid gases used to manufacture sulfur at the Plant. Valuable by-products taken off in Qatar include light oil condensate and the natural gas liquids (NGLs) ethane, propane and butane. The ethane is supplied on long-term contract within Qatar – the other products are sold on international term and spot markets.

The daily nominal production of by-products varies as follows

By-products	production
Condensate	87,000 – 112,000 bbls
Ethane	3,500 – 4,400 tons
Propane	2,200 – 2,800 tons
Butane	1,400 – 1,800 tons
Sulfur	520 – 1,100 tons

The main product, refined methane gas, is then put through Dolphin’s gas compression system and is transported through the Export Pipeline to the UAE.

JGC Corporation of Japan, performed the engineering, procurement and construction (EPC) between 2004 and 2007. The gas compression trains were supplied by Rolls Royce.