David H. Johnston, ExxonMobil Exploration Co., will give his American Association of Petroleum Geologists Distinguished Lecture, “4-D Seismic in the Deep Water – Challenges and Rewards,” at a variety of locations throughout North America during the month of April. This presentation will show how ExxonMobil uses 4-D seismic technology in deepwater reservoir management and discusses some of the challenges faced in its application.


Presentations are as follows:


April 7: Wyoming Geological Association, Casper, Wyo., 11:30 a.m. www.wyogeo.org


April 8: Colorado School of Mines, Golden, Colo., 12 p.m. www.mines.edu


April 10: Canadian Society of Petroleum Geologists, 11:30 a.m. www.scpg.org


April 14: University of Idaho, Pullman, Idaho, 4 p.m. www.uhome.uidaho.edu


April 15: Northern California Geological Society, San Ramon, Calif., 1:30 p.m. www.ncgeolsoc.org


April 16: University of Colorado, Boulder, Colo., 5:30 p.m. www.colorado.edu.