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Kongdian crude oil from Dagang oil field is typical heavy naphthene base crude oil with the properties of high viscosity, low solidifying point and sulfur content. 大港油田孔店原油是典型的低硫重質(zhì)環(huán)烷基原油，具有高粘度、 凝固點(diǎn)低、含硫低的特點(diǎn)。
The extra-heavy crude oil is catalogued into low sulfur naphthene-base crude oils with high density and viscosity, which are similar to those of the residue of ordinary crude oil. 遼河超稠油屬於低硫環(huán)烷基原油，其密度大、粘度高，性質(zhì)與一般原油的渣油餾分相近。