DELHI--September 28, 2012--Researched by Industrial Info Resources India (Delhi, India)--Oman Oil Refineries and Petroleum Industries Company (Orpic) (Muscat, Oman), Oman's major refiner, has shortlisted nine international engineering firms for the $1.2 billion expansion of its Sohar Refinery complex. The expansion, which is estimated to cost $1.5 billion to $1.8 billion, is being overseen by Orpic, a wholly government owned integrated refining and petrochemicals entity.