Abstract
Bioturbation the reworking activity by organisms in and around sediment surfaces is a natural day to day and important process in the marine environment. This process brings about disruption and alteration to primary sedimentary lithologies though commonly overlooked in the areas of reservoir quality assessment. In other to assess the effect of these reworking activities on reservoir quality (porosity and permeability), two core samples of approximately 32 ft, recovered from the Miocene interval of the parallic Agbada Formation, located in the South-eastern offshore Niger Delta were subjected to conventional core/thin section analysis. The resulting datasets containing digital core images. Petrophysical plug data and thin section reports were employed in this study/research work. The samples showed dominance of bioturbated lithofacies with the spread of the ruziana and Skolithos ichnofacie associations. It was revealed also that the cleaner sandstone fades have the best reservoir quality while the more bioturbated intervals of the entire cored sections had porosity and permeability values slightly higher than their rarely-lowly bioturbated counterparts.
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