Gas And Global Gas Trends

Global gas reserves and trends
Natural gas - natural gas is a gas consisting primarily of methane (CH4). It is often informally referred to as simply gas or fuel gas, especially when compared to other energy sources such as electricity. It also contains varying amounts of higher molecular weight gaseous hydrocarbons, carbon dioxide, acid gases, and a few amounts of water and mercury. While the origins of natural gas deposits are not known clearly, and each reservoir has own geological history, it is generally believed that the methane (rich gas) was formed over millions of years from organic matter, especially from former marine or coastal ecosystems. Decomposed organic matter from dead plants and animals became covered in layers of mud and other sediments, and as more mud and other sediments piled on top of the organic matter, the pressure and temperature increased. The increased pressure and temperature is thought to have caused the organic matter to slowly transform into methane-rich gas and oil. Once formed, gas deposits tended to rise towards the surface of the earth thro...