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.
Perforation, as related to oil wells, refers to a hole being punched in the casing of a well. This hole is used to create a flow-path between the reservoir and the wellbore, which causes oil and gas to flow to the wellbore easily. These holes are created by a perforating gun which are run on electrical signals, coiled tubing or slickline.