Presentation of J. C. 'Cam' Sproule Memorial Award to Yuanjia Han, Brian Horsfield, Richard Wirth, Nicolaj Mahlstedt and Sylvain Bernard for 'Oil retention and porosity evolution in organic-rich shales' (AAPG BULLETIN, June 2017) at the Opening Session, Annual Convention & Exhibition in San Antonio, Texas on May 19, 2019.