What is dynamic reservoir evaluation? Reservoir Technical Director Francois-Xavier Dubost and Technical Director Well Testing & Production Bertrand Theuveny discuss dynamic reservoir evaluation, which studies the movement of reservoir fluid to derisk and determine reserves. Together, drillstem testing (DST) and deep transient testing (DTT) technologies provide an in-depth understanding of fluid characteristics and formation producibility to improve decision making for completion designs, sidetracks, near-field exploration and development, facilities designs, and more.