Department of Earth Sciences
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Browsing Department of Earth Sciences by Author "UMOH, EKAETE ENAMEKERE"
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Item FORAMINIFERAL ANALYSIS AND PALEOENVIRONMENTS OF SEDIMENTS IN WELL -AA, DEEPWATER OFFSHORE, NIGER DELTA, NIGERIA.(GLOBAL JOURNAL OF PURE AND APPLIED SCIENCES, 2020-03-27) UMOH, EKAETE ENAMEKERE; FASINA, PEACE OLUWASEYIForaminiferal analysis was carried out on twenty five (25) ditch cutting samples from well -AA, offsore Niger Delta covering a depth interval of 9000ft-11025f. The study was aimed at age deduction, zoning the well, and interpreting the paleoenvironment of deposition. Lithostratigraphic description carried out on the sample revealed that the bulk lithofacies constitute shale with streaks of sand (fine-medium) between 9170ft - 9210ft and 9360ft -9380ft. The entire analysed interval was barren of planktonic foraminifera while depth 9960ft revealed a spot occurrence of Lagena spp, representing the only calcareous benthic foraminifera recovered in the entire interval. Few to common occurrences of deepwater agglutinated foraminifera were found in the well, dominated by some species of Haplophragmoides spp and Haplophragmoides narivaensis. Other foraminifera with rare and scattered occurrence includes, Cribrostomides spp, Bathysiphon spp, Troahammina spp, Cyclammina spp, Cyclammina cancellata, Valvulina spp, and Glomospira spp. The only microfaunal associated accessory recovered is ostracod at depth 1080ft. The analysed intervals was assigned a Middle – Late Miocene (N17 and older age) based on the FDO of Haplophragmoides narivaensis. The environment of deposition is based on the distribution of typical deep water arenaeceous foraminifera species recovered in the study. The predominance of the arenaeceous forms over calcareous forms suggest outer shelf environment of deposition.Item An Integrated Studies: Bio facies Analysis of Sediments of Well B -1, Offshore, Niger Delta(IRE Journals, 2020-04-01) UMOH, EKAETE ENAMEKEREAbstract- Biofacies analysis of twenty five samples from well B-1, offshore Niger Delta, based on the nannofossil and foraminiferal content were carried out. The aim was to identify the biozones, determine the age and reconstruct paleoenvironment of the sediments. From the diagnostic taxa recovered two biozones were recognized for the nannofossil NN7 (Discoater Kugeri zone) and NN6 Cyclicargolithus Floridanus zone), while the foraminferal zone identified include N13-N12 and N11, both Calcareous nannofossil and Foraminiferal analysis indicate middle Miocene. A proximal to distal inner neritic (6440 – 6860ft), middle – outer neritic (6860 - 7640ft), shallow inner neritic (7760 – 9140ft) and middle – outer neritic (9290 – 10340ft) paleoenvironment was recognized for the study intervals. Paleoenvironmental deductions were based primarily on benthic foraminiferal assemblage and abundance and diversity of species. Presence or absence of planktic foraminifera and calcareous nannofossils also helped in deciphering Open Ocean