Rick Gdanski is a production technologist in the stimulation fluids group at Shell’s Bellaire Technology Center in Houston, TX.  His responsibilities include technology transfer and treatment design in the areas of sandstone and carbonate acidizing, scale squeeze evaluations, and well treatment returns analysis and interpretation.  Dr. Gdanski joined SIEP in 2010 after 30 years with Halliburton in the production enhancement section.  He holds a BS degree in chemistry from Southwestern Oklahoma State University and a PhD in physical organic chemistry from the University of Illinois, graduating in 1980.  He is a member of the American Chemical Society and the Society of Petroleum Engineers, and has authored numerous technical papers on many aspects of acid stimulations as well as fracture cleanup in tight gas reservoirs.  He was an SPE distinguished Lecturer for the 1996-1997 season and often co-chairs technical sessions at SPE technical conferences.