RECONSTRUCTION OF THE PALEO-DEPOSITIONAL SETTINGS OF THE CHATTIAN GH6.2 SAND IN THE ARO FIELD, ONSHORE DEPOBELT, NIGER DELTA BASIN
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Delineating the depositional environment is a key factor in oil field characterization because it serves as a key input into property distribution in the 3D model. This study is carried out to reconstruct the paleo-environment of deposition of the GH6.2 reservoir through data integration. A combination of well logs, lithological and mineralogical description of side wall samples and biofacies data were used to reconstruct the paleo-environment of deposition. Gamma ray log signatures were utilised to infer depositional features, discriminate litho-units, and define facies association. Lithological descriptions of Side Wall sample describe a grey sandy clayey, fine to silty with rare to medium and coarse grains sediments across some wells. The mineralogical description on side wall sample denotes the presence of quartz, mica flakes and pyrites. The interpretation of biofacies data located the deposit in the Middle to Outer Neritic environment deposited in the Oligocene in the Chattian age during a rising sea level. The integration of the results from the well logs, side wall samples, mineralogical studies, and biofacies data points that the GH6.2 reservoir is a channelised shoreface deposit, deposited in the Chattian age in a transgressive environment.
| Pages | 44-49 |
| Year | 2024 |
| Issue | 2 |
| Volume | 2 |
