Methodological framework for tight reserve provement for a carbonate reservoir

Abstract

Currently, there is a gap between standard national classification of tight reserves and existence of naturally fractured cavernous carbonate reservoirs with low permeable matrix (less than 2 mD), but rather high and not typical initial fluid rate. However, according to development practice for such reservoirs, high rates tend to rapidly decrease to typical for matrix low values because of the small volume of the reserves of fractures and vuggs. This article discusses the methodological framework developed by the authors for tight reserve provement for a carbonate reservoir based on the estimation of the reserves of fractures and vuggs and the well decline rate.