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Foraminifera biostraigraphy and paleoenvironment of well X Niger Delta
Department of Earth Sciences, Federal University of Petroleum Resources, Effurun 330102, Delta State, Nigeria.
Review
International Journal of Science and Research Archive, 2024, 13(02), 2623–2635.
Article DOI: 10.30574/ijsra.2024.13.2.2408
Publication history:
Received on 28 October 2024; revised on 04 December 2024; accepted on 07 December 2024
Abstract:
The study involved the micropaleontological studies of Well X, Coastal Swamp depobelt, Niger Delta. A total of fifty (50) ditch cutting samples were taken at interval of 50ft across the total depth of (3000ft-4300ft). The ditch cutting sample were studied for their lithology and foraminifera contents for the purpose of determining the age, paleo-environment, and identification of key sequence stratigraphic surfaces penetrated by the well. Standard foraminifera preparation procedures were involved in the disaggregation of the samples and subsequent analysis. Quantitative and qualitative analysis yielded a well preserved stratigraphically significant foraminifera assemblage with a total of one hundred and twenty-nine (129) species, Ninety-Eight (98) Benthics and thirty-one (31) planktics. Six zones were created and compared with the Blow et. al 1979. These zones were Hanzawaia strattoni zone which corresponded with the terminal depth at 4300ft, Eponides sp., zone, Quinqueloculina seminulum zone, Uvigerina sp., zone, Heterostegina panamensis zone and Cassdulina neocarinata zone at the top of the well. These zones corresponded with N6, N7, N8 and N9 of the Blow et al. 1979 scheme. The paleobathemetry of the well depicted inner neritic environment.
Keywords:
Agbada Formation; Niger Delta; Inner Neritic; Biostratigraphy; Foraminifera
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