Underbalanced tubing conveyed perofration (TCP) attained higher production and assured safety when applied with sucker-rod pump installation in wells in three different Egyptian oil fields. The TCP allowed more efficient operation because it does not require killing the well after perforation to run the downhole pump and sucker rod. The overbalanced perforation eliminates the risks of damaging the producing formation beyond the perforations.

The compared performance of wells using underbalanced TCP with that of other wells using tubing gun technique, casing gun technique eveals that the underbalanced TCP prevailed successful in all cases.

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