Transient 06 : A short lived state. Generally used describing reservoirs during production as pressure is progressively drawn down near the wellbore and slowly permeates the rock outward
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}