Biography Dr. David S. Schechter is George and Joan Voneiff Professor of Petroleum Engineering at Texas A&M University. Dr. Schechter received his B.S. degree in chemical engineering from the University of Texas at Austin (1984) and his PhD in physical chemistry from Bristol University, England (1988). He manages a research program in Enhanced Oil Recovery both with chemical additives and via gas injection. He specializes in EOR with surfactants and NGL/CO2 and is Director of the Chaparral-Fischer CO2 Enhanced Oil Recovery Center and the Chevron Imaging Center at Texas A&M. Dr. Schechter was the author and Principal Investigator for a 13 million dollar, Department of Energy/National Petroleum Technology Office Class III Field Demonstration CO2 project in the naturally fractured Spraberry Trend Area in which he teamed with Pioneer Natural Resources. Dr. Schechter has spent the last several years researching surfactant molecular structure for design of EOR projects in unconventional liquid reservoirs. Dr. Schechter has taught over 80 industry short courses and consulted in over a dozen countries.
Abstract Application of surfactants in unconventional liquid reservoirs (ULR) for both frac and EOR applications has been the subject of speculation, controversy, disappointment and in some cases, success. In this presentation, we attempt to come to a greater understanding of what governs the process and how to better design surfactant systems to capitalize on the imbibition mechanism via wettability alteration. Lab results showing how to design surfactant molecules for specific applications will be presented. It will be demonstrated that surfactants (nonionic, cationic and anionic) must be designed on a case by case basis that accounts for oil properties, salinity, mineralogy and reservoir temperature.