Crude oils from the Brent and the Ninian oilelds in the northern 

Atlantic are light sweet crude oil.

Crude oils from the Middle East are mostly medium sour crude oil, 

such as Basra light of Iraq, Dubai of the United Arab Emirates, and 

Qatar Marine of Qatar.

China’s Daqing Oileld produces light sweet crude oil and the 

Shengli Oileld produces medium-to-heavy sour crude oil.

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