Petrophysical characteristics and reservoir quality of the Inda Field, Niger Delta, Nigeria

Ameloko Anthony Aduojo, Oseghe Emmanuel


Porosity and permeability are the main petrophysical properties of a reservoir rock and have a vital impact on the evaluation processes at all stages. This project involved the analysis of well logs [Well-1 and Well-2] from a field in the eastern part of the Niger Delta by identifying candidate sand formations in each well and then calculating petrophysical parameters for these potential reservoirs. As a result of this study, six different units [A to F] ware identified in the Formation by using the gamma ray log data. The predicted porosities and permeabilities for each unit show poor to moderate quality reservoirs. The average porosity values are moderate and approximately the same, but have very low permeability due to the presence of high volume of shale in the reservoirs. The thicknesses of the reservoirs are small [averaging between 5.5 and 24.5 m]. Also from the results, there are indications that sand D and F may be one continuous sand body. This is because the two sand bodies have the same porosity, similar formation thickness and their depth values are also very close. In all, the part of the Inda field under study does not have good prospect for exploration and production because of the high level of water saturation in the reservoirs and consequently low hydrocarbon saturations. However, reservoirs A and E comparatively show promising reserve for hydrocarbon.

Keywords: Hydrocarbon saturation, petrophysical properties, reservoirs, water saturation

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