Abstract
We report on a series of laboratory flow experiments comparing the productivity of perforations created with reactive liner charges against those created with conventional liner charges. Three of the tests involved shots into an outcrop carbonate rock called Indiana Limestone. Three of the tests involved shots into an outcrop sandstone rock called Berea Sandstone. Four different charge types were tested, including one standard (conventional) charge and three different designs of reactive liner charges. Among all charges, the only difference of note was the design and composition of the liner. All other charge design parameters were kept constant.
For both rock types, the reactive liner charges produced perforations with lower productivity than the baseline conventional charge. The reduction in the normalized Productivity Ratio (PRn) ranged from 29% to 66%. Furthermore, the reactive liner charges produced characteristic "dynamic overbalance" conditions in the wellbore, in a system configuration which produced dynamic underbalance for the conventional charge. We conclude that the reactive liner charges tested are detrimental to productivity in naturally perforated completions.
