1. State Key Laboratory of Heavy Oil Processing, Petroleum Molecular Engineering Center (PMEC), China University of Petroleum, Beijing 102249, China
2. PRISM Imaging and Analysis Center, Princeton University, 86 Olden St., Princeton, New Jersey 08544, United States
3. Cameron Process Systems, Schlumberger, 4901 W. Sam Houston Pkw., Houston, Texas 77041, United States
4. Energy Institute and Department of Chemical Engineering, City College of New York, New York City, New York 10031, United States
5. Schlumberger-Doll Research, 1 Hampshire St., Cambridge, Massachusetts 02139, United States