Standard gas tanks are developed when gas moves toward the Earth's surface from an organic-rich source development into highly permeable shell rock, where it is On the other hand, shale gas resources form within the organic-rich shale source rock. The low permeability of the shale significantly hinders the gas from moving to more rocks in the reservoir. Without horizontal drilling and hydraulic fracturing, shale gas production would not be economically possible since the natural gas would not pass from the formation at high sufficient rates to validate the expense of drilling.
Gas: A Cleaner Burning Fuel than any other
Gas is cleaner-burning than coal or oil.