STRATIGRAPHY AND GAS PRODUCTION FROM THE MARCELLUS SHALE IN SOUTHERN WEST VIRGINIA
Recent activity in Marcellus Shale gas exploration has extended to southern West Virginia. In Logan County, WV, the Marcellus Shale ranges from zero to about 20 feet thick across most of the county with the western area ranging to about 30 feet. Temperature logs indicate that the thin Marcellus Shale is productive of natural gas but most wells are completed in the interval containing both the Marcellus Shale and the overlying organic-rich Rhinestreet Shale Member of the West Falls Formation that onlaps the Middle Devonian unconformity. Structure contours on the top of the Onondaga Limestone, immediately beneath the Marcellus Shale, indicate that areas of most active exploration lie along the axis of the Warfield anticline and in the eastern limb of the structure.