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.
Seismic surveys are used by geoscience professionals to produce detailed images of rock types and formations beneath the earth’s surface. These surveys are created by bouncing sound waves off underground rock formations. The bounce back of sound waves are recorded, and a crude image is made to help determine the size and location of underground reservoirs. This process is similar to ultrasound technology. Various jobs exist in this field, all the way from entry-level field recorders, to high-level geoscientists who interpret and model the data.