Saudi Aramco and Sumitomo Chemical started the Petro Rabigh Project with the aim of building integrated oil refining and petrochemical operations by way of upgrading Saudi Aramco’s oil refinery and constructing a new petrochemical complex. A joint venture agreement was signed between Saudi Aramco and Sumitomo Chemical in August 2005 and Petro Rabigh was established, an equally owned joint venture to run the Rabigh complex, in September of the same year. Construction commenced in March 2006, wi...