What is natural Gas and types it?

Natural Gas: a mixture of hydrocarbons (organic) and other non-hydrocarbons (non-organic) that exist in a gaseous phase or in solution with crude oil in natural subsurface reservoirs. Types of natural gas include: Free vapor phase gas and dissolved gas. Dry gas and wet gas - a function of water vapor content Dry gas: methane (CH4). Wet gas: ethane (C2H6), propane (C3H8), butane (C4H10), pentane (C5H12). Sweet and Sour Gas - function of hydrogen sulfide (H2S) content (low vs. high, respectively). Other naturally occurring Gases. Inert Gases and radioactive decay gas: Helium (He), Argon (Ar), Radon (Ra). Other Naturally Occurring Gases: Nitrogen (N2) Carbon Dioxide (CO2), Hydrogen (H2), Hydrogen Sulfide (H2S), Water Vapor (H2O)