دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a substance occurring naturally in the earth in solid, liquid, or gaseous state and composed mainly of mixtures of chemical compounds of carbon and hydrogen, with or without other nonmetallic elements such as sulphur, oxygen, and nitrogen. In some cases, especially in the measurement of oil and gas, petroleum refers only to oil-.a liquid hydrocarbon-and does not include natural gas or gas liquids such as propane and butane. The API Measurement Coordination Department prefers that petroleum mean crude oil and not natural gas or gas liquids.

Latin origin is rock oil.