Oil wells and gas wells

Oil wells mainly contain crude oil and amounts of NGL or Natural Gas Liquids, which are sometimes called crude oil liquids.
These liquids include ethane, propane, butane and some heavier hydrocarbon compounds.
Crude oil is separated in oil refineries and derivatives such as gasoline, kerosene, fuel oil, etc. are extracted from it, and NGL is also sent to downstream units (petrochemical industries) or sold directly for household use, fuel, etc. .

Gas wells mainly contain rich gas (sour gas) and gas condensate. These condensates are mainly pentane and heavier compounds, which are either sent to oil refineries for separation or sold directly.

In some classifications, the output gas from gas fields is called sour gas due to its sulfur content, and after the separation of sulfur, it is called rich or sweet gas, and in some other sources, this output gas, which also contains sulfur compounds, is called rich gas. are called The common point of all these names is the removal or not of sulfur and sulfur compounds.