Rabigh Refining and Petrochemical Company "Petro Rabigh" has signed an agreement with its founding shareholders including Saudi Arabian Oil Company "Aramco" and Sumitomo Chemical Company to provide it with gas, the distribution of products and reduction of commission. The company expected in a statement issued today that the agreement will increase its revenues by nearly one billion Saudi riyals this year and SR 1.3 billion per annum in the coming years.