METHOD FOR DYNAMIC PRESSURE REGULATION DURING WELL PERFORATION (VARIANTS) Russian patent published in 2007 - IPC E21B43/11 

FIELD: methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells, particularly for pressure regulation during perforation operation execution.

SUBSTANCE: method in accordance with the first embodiment involves determining characteristics of reservoir to be perforated; selecting dynamic pressure change profile on the base of reservoir characteristics; selecting perforation tool; choosing well fluid from reservoir characteristics and selected perforation tool to obtain chosen dynamic pressure change profile with taking into consideration explosive force of charges and perforator volume. Method in accordance with the second embodiment involves filling well with well fluid selected to regulate dynamic pressure change during perforation tool explosion and after perforation tool explosion with taking into consideration explosive force of charges and perforator volume. Well is perforated by perforation tool explosion.

EFFECT: improved fluid communication between well and reservoir.

14 cl, 5 dwg