Perforating gun assembly and method for controlling wellbore pressure regimes during perforating

A downhole tool gun string assembly comprising:

• a first perforating gun operable to generate a first pressure at a first location in a wellbore, wherein the first perforating gun comprises a first plurality of perforating charges;
• a second perforating gun operable to generate a second pressure at a second location in the wellbore, wherein the second perforating gun comprises a second plurality of perforating charges;
• a blank pipe section disposed between the first perforating gun and the second perforating gun, wherein the blank pipe section comprises a secondary pressure generator, and wherein the secondary pressure generator is operably associated with at least one of the first perforating gun or the second perforating gun,
• wherein the first perforating gun, the second perforating gun, and the blank pipe section are configured to maintain a pressure at a selected location in the wellbore below a threshold when the first perforating gun and the second perforating gun are activated substantially concurrently.