This research effort is targeted at producing a fundamental understanding of the formation-damage mechanisms responsible for deliverability loss and their cause-effect relationships to deliverability loss in a broad spectrum of gas-storage fields and reservoirs. This project will provide 1) definitions of the mechanisms responsible for loss of deliverability in storage wells, 2) an outline of testing procedures that operators can use to deduce the type of damage mechanism, and 3) the basis for identifying procedures to prevent or remove damage.