Abstract

The quality of a reservoir is defined by its hydrocarbon storage capacity and deliverability. Grain size distribution is one of key sedimentological characteristics used to analyse the reservoir character and plays a major role in hydrocarbon storage capacity and deliverability. Traditionally, grain size are identified and computed from cores. However, while core data provide direct computations of grain size, they are costly to acquire and recovery is often less than 100% as they seldom encompass the entire stratigraphic interval of interest. Wireline logs can provide an effective and reliable means to identify and estimate the grain size and thus study the reservoir character.