Publication Date: 2024/02/09
Abstract: Paleoenvironmental interpretation and palynozonation was carried out using fifty ditch cutting samples ranging from 7020 ft – 10020 ft, with a total thickness of 3000 m from Osere-004 Well. The lithology of the ditch cuttings was described and analysed using wet-sieving technique. Palynological sample preparation was also carried out on the ditch cuttings following the non-mineral acid method and was analysed using transmitting light microscope. The lithologic description and wet-sieve analysis generated the lithology and sand- shale ratio/gradational plot. The palynological analysis indicated the palynomorphs recovered from the palynological sample preparation which were grouped in their paleoenvironments. The statistical analysis of the recovered palynomorphs indicated dominance in terrestrially derived palynomorphs (Pollen and spores) over marine derived palynomorphs. This indicated deposition within continental (fresh water to brackish water) environment to nearshore marine and open marine environment. The ditch cuttings were deposited during the late Miocene to early Pliocene times and corresponded to P870 to P860 of the SPDC palynological zonation.
Keywords: Paleoenvironment, Palynozonation, Lithostratigraphy, Sand-Shale Ratio, Gradation.
DOI: https://doi.org/10.5281/zenodo.10638273
PDF: https://ijirst.demo4.arinfotech.co/assets/upload/files/IJISRT23NOV527.pdf
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