Over a decade ago, GHK began exploring in the Arkoma-Ouachita province in eastern Oklahoma.  The above photo shows Potato Hills, as seen across Sardis Lake. While structurally very complex, the geology of the area was intriguing to GHK and the company believed the fold and thrust belts could be highly prospective.  GHK’s analysis proved to be correct when, in 1997, the company discovered the prolific Potato Hills natural gas field.  The Potato Hills field is located on a large structural element known as the Potato Hills anticlinorium, and it is considered one of the larger onshore natural gas discoveries in North America in recent decades.  The name “Potato Hills” is derived from the Bigfork Chert ridges that weather unevenly because of intense natural fractures; and at the surface, these knobby, steep-sided hills resemble a potato patch.  GHK was the sole developer of the Potato Hills field, where the company has drilled over 50 wells with an average producing depth of 5,200 feet.  The daily natural gas production from the Potato Hills field was in excess of 140 million cubic feet per day in 2000, and at that time, the Potato Hills field boasted seven of the top ten producing gas wells in the state of Oklahoma.   

73% success rate on all wells drilled since 1959.
85% success rate for wells drilled since 1995.Two natural gas wells at a site in southeastern Oklahoma.