Palynofacies, sedimentology and palaeoenvironment evidenced by studies on IDA-6 well, Niger Delta, Nigeria

Chukwuma-Orji, Jacinta Nkiru; Okosun, E. A.; Goro, Isah Aliyu; Waziri, S. H.

doi:10.1201/9781315161808-6

Cited by 5 publications

(3 citation statements)

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“…Pollen and spores were dominant. The results of this study are similar to that obtained in the palynofacies studies of Ida-5 and Ida-6 wells Niger Delta Basin (Chukwuma-Orji et al 2017a, 2017b. Photomicrographs of some of the recovered forms are illustrated in Figure 4.…”

Section: Palynologysupporting

confidence: 86%

Palynofacies analysis of Ida-4 well, Niger Delta Basin, Nigeria

Chukwuma-Orji

Okosun

Gana

2019

geol

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Palynofacies analyses of the strata penetrated by Ida-4 wells were carried out with the aim of studying the stratigraphic sequence penetrated by the well in order to establish palynostratigraphic zones, relative age and the paleoenvironment of deposition. Fifty ditch cutting samples within the interval of 2179-3523 m were analyzed. The acid methods of sample preparation for palynofacies analyses were followed. The result of the analyses yielded low to abundant occurrences of pollen and spores with an abundance of small, medium and large sizes of palynomacerals 1 and 2, few occurrences of palynomacerals 3 and 4. The lithology consists of the alternation of shale and sandstone units with few intercalations of argillaceous sandstone units, indicating that the studied interval belongs to the Agbada Formation. The studied intervals were dated to the middle Miocene to late Miocene, based on the recovered age diagnostic marker species such as Zonocostatites ramonae, Multiareolites formosus, Verrutricolporites rotundiporus, Crassoretitriletes vanraadshoveni and Racemonocolpites hians. Two interval range palynostratigraphic zones: Multiareolites formosus-Zonocostatites ramonae, Verrutricolporites rotundiporus-Crassoretitriletes vanraadshoveni and a taxon range zone: Ainipollinite verus zone were proposed. Paleoenvironmental interpretation was based on the palynofacies association and the lithology which revealed that the stratigraphic interval studied was deposited in the Coastal-deltaic (marginal marine) environments.

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Section: Palynologysupporting

confidence: 86%

Palynofacies analysis of Ida-4 well, Niger Delta Basin, Nigeria

Chukwuma-Orji

Okosun

Gana

2019

geol

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“…Most previous biostratigraphic and paleoenvironmental studies in Nigerian basins are concentrated within the Niger Delta Basin owing to intense hydrocarbon explorations and exploitation activities in the region (e.g. Fajemila, 2012;Fadiya et al, 2014;Ikegwuonu and Umeji, 2016;Bankole et al, 2016;Chukwuma-Orji et al, 2017;Olayiwola and Bamford, 2019;Olayiwola, 2021;Fajemila et al, 2022). In the Dahomey Basin, a small number of studies have employed palynological investigation in bio stratigraphic and paleoenvironmental analyses (e.g.…”

Section: Introduction E-issn 2082-0259mentioning

confidence: 99%

Graphic correlation and paleoenvironmental investigation of the upper Eocene–lower Oligocene sediments in the Dahomey Basin, southwestern Nigeria: insights from palynomorphs

Oláyíwolá¹,

Durugbo²,

Fajemila³

2022

Acta Palaeobot.

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This study presents the results of a comprehensive qualitative and quantitative palynological analysis of four shallow boreholes (Epe-1, Olokonla-1, Ikoyi-1 and Badore-1) in the lower Eocene–upper Oligocene periods of the Dahomey Basin, southwestern Nigeria. The lithostratigraphic analysis revealed three lithologies (sandy-shales, shaly-sands and sandstones). Two most important palynological zones, the Verrucatosporites usmensis, as well as the Magnastriatites howardi Pan-tropical zones, are delineated. First Appearance Datum (FAD) of Achomosphaera alcicornu marked the late Eocene–early Oligocene boundaries (E/O) within the four boreholes, while FAD of Adnatosphaeridium multispinosum defined the late Eocene–early Oligocene boundary (E/O) in Ikoy-1. Two informal palynological assemblage zones were revealed in the four boreholes. Common occurrences of palms, mangrove, fresh water and brackish water pollen, and pteridophyte spores with spots records of marine elements and algae species during marine invasion suggested fluctuation from fluvio-deltaic/nearshore to marginal marine paleoenvironments. Graphic correlation discloses that for every meter of sedimentary rock accretion within Epe-1, equally amounted to merely 0.31 m, 0.56 m, as well as 0.47 m of sediments, which were put down in Olokonla-1, Ikoyi-1, as well as Badore-1, respectively. These comparative rates of sedimentary rock accretion show with the purpose of either there is fewer attrition occurrence and/or extra accommodation gap within Epe-1 than Olokonla-1, Ikoyi-1, as well as Badore-1. The assessment of the slopes, intercept and correlation equations through graphic correlation procedures enable the identification of four biostratigraphic events in Epe-1, Olokonla-1, Ikoyi-1, as well as Badore-1. The findings in this investigation are necessary for depositional succession and paleoenvironmental understandings, as well as basin investigation, and above all, to show a relationship of broadly separated boreholes.

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“…Some researchers made use of only palynomorphs to analyse paleoenvironment of deposition in the Niger Delta Basin [5][6][7][8][9][10][11] explained the usage of palynofacies in analysing paleoenvironment of deposition. Research works on palynomorphs and palynofacies for paleoenvironmental analysis are quite limited.…”

Section: Introductionmentioning

confidence: 99%

Palynofacies Analyses of HA-001 well, Offshore Depobelt, Niger Delta Basin, Nigeria

Olatunji¹,

Oluwajana²

2022

EESRJ

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Palynofacies studies of the strata penetrated by HA-001 well were carried out with the aim to establish palynostratigraphic zones and paleodepositional environments. The standard acid palynological method of sample administration was employed to recover the palynofacies, soaking and washing of samples with water for sedimentological analyses and integration of Gamma Ray Log, palynofacies and sedimentological data for interpretation of paleodepositional environments. The study established two new assemblage biozones namely Cyperaceaepollis sp. – Nympheaepollis clarus, and Stereisporites sp. within the sedimentary intervals penetrated in the wells. The Cyperaceaepollis sp. – Nympheaepollis clarus biozones were further subdivided into Nympheaepollis clarus – Echitriletes pliocenicus and Cyperaceaepollis sp. – Elaeis guineensis subzones. The Late Miocene age is associated with the biozones. The lithologic, textural and wireline log data indicated that the intervals studied in the HA-001 well belong to the Benin Formation and Agbada Formation. Index minerals and accessories are dominated by ferruginous materials, glauconite pellets, carbonaceous detritus, shell fragments and pyrites plus minor mica flakes. Lower delta plain, delta front and prodelta environment of deposition were inferred for the studied well intervals. The research has conformed to international stratigraphic guide for establishment of biozones which serves to increase the knowledge of high resolution biostratigraphy.

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Palynofacies, sedimentology and palaeoenvironment evidenced by studies on IDA-6 well, Niger Delta, Nigeria

Cited by 5 publications

References 1 publication

Palynofacies analysis of Ida-4 well, Niger Delta Basin, Nigeria

Palynofacies analysis of Ida-4 well, Niger Delta Basin, Nigeria

Graphic correlation and paleoenvironmental investigation of the upper Eocene–lower Oligocene sediments in the Dahomey Basin, southwestern Nigeria: insights from palynomorphs

Palynofacies Analyses of HA-001 well, Offshore Depobelt, Niger Delta Basin, Nigeria

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