MR. DAVID PATRICK MURPHY retired from Shell Exploration and Production after almost 35 years of engineering and operational experience, with emphasis on petrophysical engineering and technical learning. For over 16 years he was formation evaluation lecturer in the University of Houston Petroleum Engineering Graduate Program. He received the Outstanding Lecturer award from the University of Houston Cullen College of Engineering twice. He is widely published including multiple articles in World Oil and contributions to Carbonate Reservoir Characterization: A Geological-Engineering Analysis, Part II (Elsevier 1996). He has been a judge for Hart's E&P annual Meritorious Engineering Awards and an industry advisor for Oilfield Review. He is a member of the Society of Petrophysicists and Well Log Analysts (SPWLA) and the Society of Petroleum Engineers (SPE). He has taught numerous SPWLA short courses. SPE committee memberships have included Education and Professionalism Committee and Measurement While Drilling Reprint Editorial Committee. Murphy is a Licensed Professional Engineer in Petroleum Engineering. He received a BS degree in Petroleum Engineering from the University of Oklahoma.