Various techniques are available to control sand production but gravel packing is recognized as one of the most reliable, so long as a complete pack is achieved. In cased hole completions, packing the perforations in addition to the wellbore is critical for the success of the treatment and can be performed either above or below the fracture pressure depending on the type of treatment being performed. In this presentation, we discuss the principles, packing mechanisms and design considerations of cased hole gravel packs performed below fracture pressure and high rate water packs performed above fracture pressure