The representative Daqing Petroleum belongs to low-sulfur paraffin-based petroleum, and most of the exploited oil is low-sulfur paraffin-based. This kind of petroleum has low sulfur content, high wax content, and high freezing point. It can produce high-quality kerosene, diesel oil, solvent oil, lubricating oil and commercial paraffin. Straight-run gasoline has good lead sensitivity.
Some petroleum has high sulfur content and high colloid content, which is a sulfur-containing paraffin base. Its straight-run gasoline distillate yield is high, and its sensitivity to lead is also good. The diesel fraction has high cetane number, high flash point, high sulfur content and high acidity, and can be refined to produce light diesel oil and special diesel oil. In the lubricating oil fraction, some components have a viscosity index above 90, which is a good raw material for the production of internal combustion engine oil.
Some petroleum has low sulfur content and high wax content, which is a low-sulfur naphthene-intermediate base. Its gasoline fraction has good sensitivity to lead, and is also rich in naphthenes and aromatics, so it is also a good raw material for catalytic reforming. The freezing point and sulfur content of the diesel fraction are low, and the acidity is relatively high, so the product needs to be washed with alkali. The vacuum residue can be oxidized to produce petroleum construction asphalt.
In addition, some low-point petroleum has low sulfur content and low wax content, which is a low-sulfur intermediate base. It is suitable for the production of low-condensation products with special properties, and it can also extract naphthenic acid, which is a rare and valuable resource.

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