Description Vanguard Natural Resources is at the forefront of oil and gas exploration in he Appalachian Basin, the Permian Basin, and South Texas, acquiring and developing oil and gas properties in these region. Vanguard Natural Resources has estimated proved reserves of 69.3 million narresl of oil equivalent and an interest in 1,185 net and more than 2,000 gross productive wells. The company also owns a 40% working interest in some 109,500 acres in Appalachia. Vinland Energy Eastern owns the remaining 60% working interest of the acreage.