Natural gas reservoirs are underground formations that contain significant amounts of natural gas, a fossil fuel primarily composed of methane. These reservoirs are typically found in porous rock layers, where gas accumulates over time due to geological processes. The gas is often trapped by impermeable rock layers, preventing it from escaping to the surface. Extraction of natural gas from these reservoirs involves drilling wells to access the gas. Once extracted, the gas can be processed and transported for various uses, including heating, electricity generation, and as a raw material in the production of chemicals. Proper management of these reservoirs is essential for sustainable energy production.