This paper presents a case history of recent hydraulic fracturing treatments of the Morrow formation in southern Blaine and western Canadian counties of Oklahoma. Hydraulic stimulation has often been avoided in the past because of water-sensitive clays commonly found in the Morrow formation. However, recent field results by Sun show that the Morrow in this area can be successfully and profitably fractured. Included is a history of Morrow treatments in the area, a summarization of recent treatment techniques and their results. Also, an economic analysis of these results is included using two years of actual post-frac production history.