As home to supermajors, as well as a plethora of smaller, independent energy players, the US boasts one of the largest concentrations of energy personnel in the world. With its insatiable appetite for energy resources, the United States is the world's single largest consumer of oil, using as much as 20.73 million barrels per day as of 2008. Recently, interest has peaked in the vast quantity of untapped natural gas resources in the US, the reserves of which were inventoried in 2008 at 238 Tcf, with producers specifically targeting the nation's promising shale formations for this energy commodity.
Dynamic Positioning is an automated computer system which keeps a vessel in its specified position or heading in deeper waters where anchoring or mooring is not feasible. In the oil and gas industry, dynamic positioning is used to keep floating vessels such as semi-submersibles and MODUs in position above the well where they might otherwise be moved by wind, waves or currents.