Project Final Report-08122-48-The objective of this theoretical and experimental project is to understand the multiple causes of loss of fracture area and fracture conductivity, and define solutions to mitigate the resulting loss of production. To accomplish this we must understand both the simpler and the often very complex hydraulic fracture networks and determine the critical parameters to maintain productive fracture area and fracture conductivity—including optimal proppants, fracture fluids, and pumping schedules, all as they are related to the heterogeneous rock formations that are to be produced. The end product deliverable would be an improved methodology for production of tight gas shales. The problem is difficult, but the potential for greatly improved production is real.