SRI International is taking part in a combined experimental and computational program with Science Applications, Inc., Sandia Laboratories, and the University of Maryland to examine methods for increasing the production of natural gas from marginal reserves by using well stimulation techniques. The method being examined is tailored pulse loading, i.e., shaping the borehole input pressure-time history to produce a specified fracture pattern. The program consists of three major tasks: (1) field experiments consisting of well bore shooting at less than full-scale using several different, available sources and with mineback to examine fracture patterns; minishots to derive in-situ fracture parameters for use in the calculations of fracture distributions, (2) laboratory experiments to determine material and fracture properties, (3) theoretical and computational work to improve the fracture modeling. Although it was originally proposed that the small-scale experiments be in Devonian shale, there were no sites readily available in the Devonian shale where it was possible to mineback around the explosive cavity to map the fracture produced in the experiments. Consequently METC decided to use Sandia Laboratory's facilities at the Nevada Test Site and perform the experiments in ashfall tuff. SRI International is performing laboratory and calculation efforts, Science Applications, Inc. (SAI) is performing fracture calculations, Sandia Laboratories is performing the small-scale field experiments, and the University of Maryland is performing additional laboratory experiments to provide information about explosive gas penetration into fractures. This report deals primarily with the status of the SRI program.