12 ranked institutions
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1 (24)China National Petroleum Corp *CHNCompany
2 (31)PetroChina Co LtdCHNCompany
3 (34)China Petroleum and Chemical Corporation *CHNCompany
4 (115)China National Offshore Oil Corp *CHNCompany
5 (209)Schlumberger *MULCompany
6 (308)SINTEF GroupNORCompany
7 (351)Shell *MULCompany
8 (358)Petrobras BrasilBRACompany
8 (358)Petrobras *MULCompany
9 (400)TOTAL *MULCompany
9 (400)Total, FranceFRACompany
10 (418)GNS ScienceNZLCompany