Single-Trip Perforation/Stimulation and Testing Method Removes Formation Damage, Reduces Operational Costs, and Increases Estimated Production in the Mato Rico Field in Parana Basin, Brazil

摘要

Stimulation combined with perforation during a drill stem testing (DST) operation offers a unique operational technique that shows promise of resolving many inherent formation damage problems that can occur when perforation is conducted during completion activities. This paper will discuss a case history in which a unique perforation-stimulation operation was attempted for the first time in Brazil. The method was suggested to a major operator who wished to test a damaged formation of an exploratory gas well in the Mato Rico Field in Parana Basin, Brazil. The primary requirement of the operation was to obtain the main reservoir parameters (pressure, permeability, skin and extension) of a sand formation in which an earlier openhole drill stem test had already identified severe near-wellbore damage. Since the procedure would not involve the main target of the well, extreme cost efficiency was required.