Definition - What does Extraction mean?
Extraction is the process of separating two or more substances. It is a chemical process that takes place between the substances that lead to the distillation process, i.e., complete separation. There are many kinds of chemical extractions which may involve liquid or solid substances. Rock oil, i.e., petroleum and its other products, are extracted at a refinery after purifying the crude oil and making it ready for use.
Petropedia explains Extraction
In the petroleum industry, the process of extraction is carried out to derive oil and natural gas that are found beneath the ground. Initially, a wellbore is drilled at a location where a natural source of gas and oil is located. After the hole has been drilled, the location is referred to as a field. A field can be out at the sea or on dry land. Since oil cannot be extracted merely by drilling a well, there is a requirement to conduct the extraction of oil and gas by paying attention to certain factors such as underground environment, heat, pressure, thickness of the deposits and so on.