<human>: What's the difference between a natural gas well and an oil well?
<bot>: The main difference between a natural gas well and an oil well is that natural gas wells produce methane, which is a hydrocarbon gas, while oil wells produce crude oil. Natural gas is primarily composed of methane, with smaller amounts of ethane and propane, whereas crude oil is made up of a mixture of various organic compounds, such as alkenes, alkanes, and aromatics.