Several recent papers have been written expounding the use of tubing conveyed perforating as, a completion technique. (See Ref. 1,2) These papers propose the use of underbalanced perforating to remove perforating damage. This paper will present a recommended method of perforating underbalanced in a closed system. Perforating in this manner allows the use of high pressure differentials to surge the perforations while at the same time limiting influx into the wellbore and allowing control of the well.

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