The Department of Energy has initiated a Multi-well Experiment with the objectives: (1) characterization of low permeability, lenticular gas sands and (2) evaluation of state-of-the-art and developing technology for their production. The location is in the Rulison Field in the Piceance Basin, Garfield County, Colorado where the lenticular Mesaverde sequence and the underlying blanket Corcoran-Cozzette are the formations of interest and lie at depths between 4000 and 8600 ft. This paper is a survey of the findings to date. It includes a discussion of a study of the most relative outcrops; the drilling program; core analysis; and well-to-well correlation of the geology. Two wells have been drilled, the first was continuously cored through the Mesaverde section from 4310 to 6820 ft. In the second well, 950 ft of core was taken, which includes all the zones of interest for stimulation experiments. Significant overpressuring was encountered and a large number of fractures were observed in the core, some open up to 3/4-inch width with partial mineralization. Preliminary indications are that natural fractures may play a much larger role in gas production from the low permeability lenticular sand than had previously been thought.