1. Oil in a narrow sense refers to crude oil. Broadly speaking, petroleum is a big concept including crude oil and various refined oils.
2. Crude oil refers to crude oil extracted from oil fields without any treatment in the process of petroleum processing and refining. Crude oil is unprocessed crude oil. Petroleum is an integral part of crude oil and is extracted from crude oil.
3. The denotations of crude oil and petroleum are different, one is narrow and the other is broad. The former only refers to crude oil extracted from the formation without any processing. The latter refers to combustible substances taken from the stratum, which we can call "oil" before and after processing. It's just a processed petroleum product. According to their characteristics and uses, people give them more exact names, such as "gasoline", "diesel", "lubricating oil" and "asphalt" to distinguish them.
Extended data:
We are used to calling crude oil. It is a dark brown viscous oily liquid with green fluorescence and special smell. It's alkanes, cycloalkanes,
A mixture of various liquid hydrocarbons such as aromatic hydrocarbons and olefins. Petroleum is one of the main targets of geological exploration. It is a viscous dark brown liquid called "industrial blood". Its main component is a mixture of alkanes, cycloalkanes and aromatic hydrocarbons.
The problem with crude oil is that it contains hundreds of different types of hydrocarbons, all of which are mixed together. It is necessary to separate different kinds of hydrocarbons in order to extract useful substances from them. Fortunately, there is a simple way to separate these substances, and that is petroleum refining.
The petroleum refining process begins with the fractionator. With the increase of hydrocarbon chain length, its boiling point will gradually increase, so it can be completely separated by distillation. The refinery is like this-in one part of the refining process, crude oil is heated and hydrocarbon chains with different lengths are separated at different evaporation temperatures. Each chain with different length has different properties and corresponds to different uses.
Oil can be extracted from crude oil in this way.
References:
Petroleum _ Baidu encyclopedia