Gassreservoirer

Gassreservoirer, or gas reservoirs, are underground geological formations that contain significant quantities of natural gas. These reservoirs form over millions of years through a complex interplay of geological processes. Sedimentary rocks, such as sandstone or limestone, are typically the host rocks, providing porous and permeable spaces for gas to accumulate. Above these reservoir rocks, a caprock layer, usually made of impermeable shale or salt, acts as a seal, preventing the gas from escaping to the surface.

The natural gas found in these reservoirs is primarily composed of methane, along with varying amounts of other hydrocarbons like ethane, propane, and butane, and often inert gases such as nitrogen and carbon dioxide. The gas originates from the decomposition of organic matter, such as ancient plant and animal remains, buried deep within the Earth's crust. Under immense heat and pressure over geological time, this organic material transforms into hydrocarbons, including natural gas.

Exploration for gassreservoirer involves geological and geophysical surveys to identify potential traps, which are geological structures that can hold hydrocarbons. Once a promising location is identified, drilling is undertaken to confirm the presence of commercially viable quantities of gas. Extraction of the gas is achieved through wells drilled into the reservoir, where the natural pressure within the formation drives the gas to the surface. The development and management of gassreservoirer are crucial for global energy supply.