gas cycling

Gas cycling is a process used in natural gas reservoirs that contain heavier hydrocarbons in a gaseous state. To prevent these hydrocarbons from condensing into unrecoverable liquids as reservoir pressure drops, the dry gas is removed and then reinjected into the reservoir. This process, known as gas cycling, continues until the maximum amount of liquids has been extracted. Afterward, the reservoir pressure is allowed to decrease, and the dry gas is produced for sale. This method effectively defers the use of the natural gas until the valuable liquids have been recovered.1

Biogeochemical cycles, on the other hand, describe the natural pathways by which essential elements circulate through the biological, geological, and chemical aspects of the biosphere. These cycles are crucial for the continuous recycling of elements necessary for life within ecosystems. They can be classified as gaseous, with reservoirs in the air or oceans, or sedimentary, with reservoirs in Earth's crust.2