a combination of new tools, the digital sonic and the induced gamma-ray spectroscopy (gst) with the high resolution dipmeter (hdt), a saraband suite of logs, and a rock core study provided a unique opportunity to re-examine fracturing (fracing) procedures and producibility in the $left double quote$ tight gas sands $right double quote$ of the cotton valley group in east texas. the depositional paleoenvironment of the cotton valley tight gas sandstones is interpreted as a sequence of shallow, marine, organically-burrowed, shoreface deposits which, with the hdt, can be separated into sedimentation units - barrier bars or tidal deltas the digital sonic tool measures values of shear and compressional velocities from which poisson's ratio is determined. the gst provides a lithological description which identifies hydrated shales and well-developed intergranular pore-filling cements such as quartz, calcite, and clay minerals which, in some cases, are containment boundaries. producibility is then estimated as a function of the fracture surface area (fracture length $multiplied by$ height) and the hydrocarbon pore volume (calculated from the saraband listing) this estimate of producibility is compared to flowmeter results. 9 refs