What is crude oil and where is it found?
Dubai-Oman oil is used as a benchmark for sour crude oil in the Middle East. A pumpjack brings oil to the surface. Crude oil is a mixture of complex hydrocarbons that is extracted from beneath the Earth's surface. An oil well. Crude oil can be refined into other petroleum products.ubai-Oman oil is used as a benchmark for sour crude oil in the Middle East. A pumpjack brings oil to the surface. Crude oil is a mixture of complex hydrocarbons that is extracted from beneath the Earth's surface. An oil well. Crude oil can be refined into other petroleum products.