The Marcellus shale is now the largest natural gas field in the United States. With the benefit of a large, liquids-rich window in southwestern Pennsylvania, the Marcellus offers the best economics of any large-scale, repeatable play in the country. A significant portion of Range's acreage also offers the benefit of natural gas potential from the Upper Devonian and Utica shale formations that lie above and below the Marcellus. In 2016, Range will be directing the majority of its capital budget towards the Marcellus.
Range pioneered the Marcellus shale in 2004 with the successful drilling of the Renz #1 well in Washington County, Pa.