METHOD AND SYSTEM FOR ORIENTED PERFORATING IN A WELL WITH PERMANENT SENSORS

摘要

A method and system is disclosed for perforating a casing in a hydrocarbon well so as to avoid perforating in a direction where a cable resides. A mass of metallic material is clamped to the casing at a predetermined offset angle with respect to the cable. The angular position of the metallic mass is detected using a detector placed inside the casing. Then, a perforating gun is oriented based on the detected angular position of the metallic mass and the predetermined offset angle. Finally, the casing is perforated so as to avoid substantial damage to the cable. The cable comprises a number of electrical conductors and is used to communicate with permanent sensors located on the cable in the vicinity of the casing to be perforated.