(from left to right): Yang Geng (PetroChina), Oscar Fernandez (Midland Valley), Javier Andres Acevedo (Columbia), Philipe Chevrier (Nexen Inc., Canada), Luz Delia Rodriguez (sitting; Nexen Inc., Columbia), Jan Witte (Wintershall, Argentina), Frank Bilotti (Unocal), Nathan Benesh (sitting; Harvard U), Prof. John Shaw (Leader, Harvard U), Joachim Müller (Harvard U), Jim Waugaman (Unocal), Chalie Brankman (Harvard U), Zhang Chaojun (PetroChina), Li Benliang (sitting; PetroChina)