The present invention provides a gravel pack assembly for use in a wellbore having a packer positioned therein with a minimum inside diameter and a primary packing seal. In one embodiment, the gravel pack assembly comprises a pack-off conduit that is coupable to the packer. The pack-off conduit has a maximum outer diameter that is sufficient to prevent the pack-off conduit from traversing the minimum inside diameter of the packer. The gravel pack assembly further includes a seal positioned about an inside diameter of the pack-off conduit. The seal is engageable with an outer surface of a tool that is passable through the pack-off conduit to inhibit fluid flow between the seal and the tool, uphole from the primary packing seal. The primary packer seal is typically near the uphole end of the packer and is the seal that isolates the downhole zones from the pressure exerted by the fluid uphole from the primary packer seal.