Naphthenic oil is extracted from naphthenic crude oil. Compared with paraffin-based oil, naphthenic oil has less resources in petroleum products. Its reserves only account for 2.2% of the world's proven oil reserves, and it is a scarce resource. The naphthenic crude oil resources in the world are mainly distributed in four places, namely Texas, California, Venezuela in South America, Xinjiang Oilfield, Liaohe Oilfield, Dagang Oilfield and Bohai Bay in China. The amount of dilute naphthenic crude oil in Texas and California gradually decreased, and the heavy naphthenic crude oil began to be exploited; At present, Venezuela's heavy naphthenic crude oil is largely exploited, and the cost of exploitation is increasing.
The naphthenic oil we can get at present is all from natural mineral oil. Only a few naphthenic hydrocarbons in naphthenic crude oil come from artificial synthesis. For example, cyclohexane comes from the product of benzene hydrogenation saturation, but benzene is almost also from oil, so the source of naphthenic oil is made from special naphthenic crude oil. Naphthenic crude oil comes from natural oil, but the proportion of naphthenic crude oil in natural oil is small.
Because the formation of naphthenic crude oil requires complex geological conditions, there is not much production. Crude oil is usually considered as a kind of ancient time. When organisms are buried underground, they are formed by decomposition, polymerization and other chemical reactions after pressure, temperature, etc. However, due to different geological conditions, different burial depths and different forms of oil production, the crude oil properties of oil blocks are different.
The world crude oil price has changed greatly, but experts have reached an agreement on the basis of crude oil, intermediate base crude oil and naphtha through induction and classification.
This is usually due to the formation history of the old underground crude oil, which coincides with the change of geological conditions and the relatively close rise of the oil layer to the surface, so it has the opportunity to contact with water, oxygen and microorganisms, resulting in the oxidation and polymerization of the volatile components of the crude oil, and gradually forming a new combination, which is more stable and paraffin and microbial, and the crude oil becomes naphthenic crude oil. For example, naphthalene-based crude oil has high viscosity and shallow burial depth. If many fields producing naphtha crude oil are naturally exposed on the ground, such as Karamel circulation crude oil, there will be a small amount of natural effluents on the surface.
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