Interference (perforating) : A perforating gun effect in which the firing of charges overlap slightly with the effect of one charge affecting the development of a jet in another with the result of reduced penetration
George E. King Engineering, 5000 Oilfield Terms: A Glossary of Petroleum Engineering Terms, Abbreviations and Acronyms, US 2010. http://gekengineering.com/Downloads/Free_Downloads /Glossary_of_Petroleum_Engineering_Terms_25_August _2010.pdf, (Oil - Amer) {593}