In South Texas, the Eagle Ford Shale has been the target of recent, extensive oil exploration. Now new drilling activity is focusing on the Buda Formation.

The permitted zone for wastewater disposal is the Ellenberger Formation.

At over 11,000 feet depth, disposal wells cost upwards of six million dollars to complete.

Due to tremendous sub-surface flows from the north, extremely high pressure is required to inject any water into this structure, driving up disposal costs. Actual disposal volumes have fallen disappointingly short of capacities in many cases.