Completion Operations - Gravel Packing
The objective of all sand exclusion techniques is to arrest the movement of formation sand into the well. Sand production can cause erosion of well equipment, well restrictions, and sand deposits in flowlines and other surface installations.
In the case of gravel packing, the gravel should be placed directly against the formation so that formation grains loosened from the rock can be arrested immediately. As the production exerts forces in the direction of the well bore, the gravel should be packed against the formation face and the pack itself should be without . . .