Brent crude oil itself isn’t something most people ever come close enough to smell directly, because it’s handled in industrial settings and quickly processed or transported.
But in general, crude oil has a very strong, sharp smell. People who have been near it describe it as a mix of gasoline, sulfur, and something slightly metallic or tar-like. It can feel heavy and unpleasant to the nose. That smell comes from the natural compounds inside crude oil, especially sulfur and hydrocarbons.
Brent crude is a type of “light sweet” crude, which means it has lower sulfur content compared to heavier oils. Because of that, its smell is usually less harsh than sour crude oils that contain more sulfur. Still, it is not something you would call mild or pleasant. Even “sweet” in oil terms only means it’s relatively less smelly, not actually sweet in fragrance.
Once crude oil is refined into products like petrol, diesel, or kerosene, the smell changes completely depending on the final fuel or chemical product. So the raw Brent oil has that typical petroleum smell, but you would only notice it in industrial environments, not in everyday life.