--> --> Depositional Environment and Petrophysical Characteristics of Reservoir Sand; A Case Study of Niger Delta, Nigeria

2018 AAPG International Conference and Exhibition

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Depositional Environment and Petrophysical Characteristics of Reservoir Sand; A Case Study of Niger Delta, Nigeria

Abstract

The reservoirs penetrated by five wells drilled in onshore field, Niger Delta were study for depositional environments and its petrophysical characteristics, the wells were investigated for its depositional environments and petrophysical characteristics. The porosity ranges from very good to excellent and the permeability vary from good to excellent. Assessment of the depositional environments is based on the integration of well logs and core data. Litho facies analysis is grouped into facies association comprising tidal channels, Uppershoreface, and Lower shoreface. A mixture of marine reworked sands andSub ordinate fluvial sands, marked by erosion base characterizes the tidal channel. The Upper shoreface facies consist of coarsening upward sequence, sandstoneSuccession of fine to very fine sand facies associations and these were caliberatedwith selected logs to allow the field correlation. The result available from integration of wire line log and core data reveal that the environment of deposition of reservoir sands lies within the marginal marine environments.