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Oilwell Cementing – Challenges from a Research Perspective – Dr. Jeffrey J. Thomas
February 22, 2017 @ 4:00 pm - 5:00 pm
Speaker: Dr. Jeffrey J. Thomas, Schlumberger-Doll Research (SDR) Cambridge, MA
Time: 4 pm – 5 pm
Henry L. Pierce Laboratory Seminar Series
Almost all oil and gas wells are completed by filling the annular space between the rock formation and the steel casing with cement. The primary purpose of the cement is to act as a seal, preventing the unwanted flow of formation fluids (hydrocarbons or water) up the surface. Cement slurries used for oilfield applications are exposed to a large range of temperatures and pressures, and are formulated with a wide variety of chemical and mineral additives in order to control the rheology, setting time, slurry density, and other properties. This seminar will discuss a few of the ongoing research areas related to oilwell cementing at SDR. Topics include experimental methods of measuring the hydration kinetics, chemical shrinkage, and bulk shrinkage under realistic temperature and pressure conditions, the use of expanding additives to improve the sealing capability of cement, and the effects of high temperatures (up to 200°C) on the microstructure and properties of cement.
Jeffrey J. Thomas is a Principal Research Scientist at Schlumberger-Doll Research in Cambridge, MA. He has a Ph.D. in Materials Science and Engineering from Northwestern University, where his thesis project focused on high-temperature ceramic processing. After completing his PhD, he switched fields to cement chemistry, working closely with renowned cement expert Prof. Hamlin Jennings at Northwestern. Over the next fifteen years, Dr. Thomas developed a reputation as an expert on the nanostructure of cement hydration products, the kinetics of cement hydration, and the application of neutron scattering techniques to the study of cement. In 2010, he made the switch from academia to industry when he accepted his current position with Schlumberger, the world’s largest oilfield services company. Oil and gas wells are sealed and stabilized with cement, and the field of oilwell cementing provides many interesting challenges for a cement specialist! Dr. Thomas has published more than 70 peer-reviewed scientific articles, several of which are quite highly cited and have made a significant impact on the field. He is a Fellow of the American Ceramic Society (ACerS), and is a two-time recipient of the Brunauer Award, a yearly best-paper award given by the Cements Division of ACerS.
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