Jack R. Jones began his career in 1982 at Amoco's Tulsa Research Center, while completing a PhD degree in petroleum engineering at the University of Tulsa. His work at Amoco focused on problems in well testing, gas reservoir engineering, hydraulic fracture evaluation, petrophysics, and reservoir simulation. Since 1998, Jones has divided his time working for BP Trinidad in Port of Spain and BP Canada in Calgary, executing various aspects of a number of different gas-field developments. Presently, he holds the position of reservoir engineering technical advisor in BP Canada's Calgary office. Jones is the coauthor of 25 papers and has served on a number of SPE technical committees. Larry K. Britt is a hydraulic fracturing consultant for NSI Technologies and manager of its rock mechanics lab at the University of Tulsa. His experience includes the optimization, design, and execution of fracture stimulations and integrated field studies throughout the world. Before joining NSI, Britt worked for Amoco Production Company for nearly 20 years; during the last 6 years with Amoco, he was a fracturing team leader at Amoco's Technology Center in Tulsa. Britt has written more than 25 technical papers on reservoir management, pressure transient analysis, and hydraulic fracturing. He holds a BS degree in geological engineering and a professional degree in petroleum engineering from the Missouri School of Science and Technology, where he is an adjunct professor in the Petroleum Engineering Department and a member of the university and Industry Advisory boards. Britt has served as an SPE Distinguished Lecturer, a member of the JPT Editorial Committee, and on numerous SPE Forum Series committees.