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.
Cartography and mapping entails the study and practice of making maps. Originally these processes were done by hand, but today this process is usually done with the assistance of a geographic information systems (GIS). These systems capture, store, analyze and manage spatial and geographic data, and they are also particularly useful for managing natural resources. They can be used in many aspects of exploration and production including land management, well planning, pipeline routing and environmental monitoring. Although most companies use GIS now, there is still some field work required to record land formations. Positions in cartography and mapping require a high level of computer proficiency and a strong geoscience or geographic background.