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

A method comprising:

• providing a gun string assembly within a wellbore, wherein the gun string assembly comprises:
• a secondary pressure generator;
• and
• a plurality of perforating guns coupled in series, wherein a first perforating gun of the plurality of perforating guns comprises a first portion of shaped charges, and wherein a second perforating gun of the plurality of perforating guns comprises a second portion of shaped charges operably associated with the secondary pressure generator;
• detonating at least the second portion of shaped charges in the gun string assembly;
• creating a dynamic underbalance condition using at least the second portion of perforating charges and the second perforating gun body in response to detonating at least the second portion of shaped charges;
• generating an increased pressure within the wellbore and outside of the gun string assembly using the secondary pressure generator in response to detonating at least the second portion of shaped charges, wherein the second pressure generator is configured to reduce at least one of a peak of the dynamic underbalance condition or a duration of the dynamic underbalance condition when activated;
• and
• generating a pressure transient comprising one or more pressures at a location in the wellbore and outside of the gun string assembly in response to perforating the wellbore using at least the second portion of shaped charges and generating the increased pressure using the secondary pressure generator, wherein the one or more pressures are based on the dynamic underbalance condition and the at least one of the reduced peak of the underbalanced condition or the reduced duration of the underbalance condition,
• wherein the one or more pressures meet one or more thresholds at the location based on the increased pressure generated by the secondary pressure generator, wherein the one or more thresholds comprise a peak pressure threshold at a peak overbalance condition or a peak pressure threshold at an underbalance condition.