Terra Tek performed laboratory tests in support of a DOE/Gas Producing Enterprise (GPE) joint project for stimulation of the Wasatch and Mesa Verde sandstone in Natural Buttes Well No. 21 located in the Bitter Creek field, Uintah County, Utah. Massive hydraulic fractures were planned to stimulate gas production. Laboratory test data analyses were directed towards optimizing three separate fractures, one in the Wasatch pay sand and one each in two different pay sands in the Mesa Verde formation.