PALYNOFACIES ANALYSIS OF PSA-1 WELL SEDIMENTS, NIGER DELTA BASIN: IMPLICATIONS FOR PALEOENVIRONMENTAL RECONSTRUCTION

Authors

Keywords:

Palynofacies, Palynomacerals, Paleoenvironment, Lithology, Structureless Organic Matter (SOM)

Abstract

The Niger Delta basin is an important geological region of economic significance, serving as a critical oil and gas exploration area. Hence, there is a need to comprehend the geological history and environmental changes within the basin. Detailed palynofacies analyses, which provide crucial insights into paleoenvironmental conditions and organic matter preservation, are limited in the onshore depobelt. This study addresses this gap by focusing on a detailed palynofacies analysis of the PSA-1 well. Palynofacies analysis was carried out on ninety ditch-cutting samples from the PSA-1 well, located in the onshore Niger Delta Basin, to delineate the paleoenvironment of deposition across depths from 3520–6160ft. Standard acid maceration and microscopic examination were utilized; 200 palynomaceral counts were made per slide to determine the abundance and size fractions of each group. Four lithofacies units were identified through physical examination and textural characteristics, namely: shaly sandstone, clayey sandstone, mudrock, and shale facies. The palynofacies assemblage is quantitatively dominated by medium and small-sized fractions of Palynomaceral-1 (PM1) and Palynomaceral-2 (PM2), moderate amount of Palynomaceral-4 (PM4) with lesser amounts of Palynomaceral-3 (PM3). Moderate records of Structureless Organic Matter (SOM) was also observed. The consistent high percentage of phytoclasts PM1, PM2 and low to moderate percentage of amorphous organic matter (AOM) established a predominantly proximal depositional setting, suggesting a Terrestrial-Brackish swamp environment characterized by fluctuating energy conditions, such as a shifting deltaic or estuarine system.This study contributes to the depositional framework and organic matter distribution within the onshore Niger Delta and beyond.

Dimensions

Abdelhalim, L. A., Mansour, A., Tahoun, S. S., Abdelrahman, K., & Wagreich, M. (2025). Paleoenvironmental and paleoclimatic trends during the early-middle Cenomanian in northeastern Africa (Egypt): Insights from palynomorph and palynofacies analyses. Review of Palaeobotany and Palynology, 335, 105297. https://doi.org/10.1016/j.revpalbo.2025.105297

Aigbadon, G.O., Igbinigie, N. S., Obasi, A. I., Akudo, E. O., Christopher, S. D., Ocheli, A., Igwe, D. O., Francis, A. J., Joseph, G. E., & Akor, D. J. (2024). Microfacies and mineralogical analyses of the Late Cretaceous carbonate rocks from the Central Benue Trough, Nigeria. Ife Journal of Science, 26(1), 101. https://doi.org/10.4314/I Js.v261.8

Aigbadon, G., Odoma, A. N., Obasi, I., Christopher, S., Changde, N., Muawiya, B. A., & Akakuru, O. (2022). Hydrocarbon prospectivity of the southern Bida and northern Anambra basins, Nigeria using palynological and geochemical studies. Geosystems and Geoenvironment, 1, 100103. https://doi.org/10.1016/j.geogeo.2022.100103

Alege, T., Lukman, A., & Odoma, A. N. (2020a). Sedimentology, lithofacies, palynofacies and sequence stratigraphy of the Campano-Maastrichtian successions within the southern Bida Basin, Nigeria, Minna Journal of Geosciences MJG, 4, 122142. https://www.researchgate.net/publication/362344283

Alege, T. S., Omada, J. I., & Onimisi, M. (2020b). Lithofacies and depositional environmental interpretation of well logs within Akos field, Coastal Swamp Depobelt of Niger Delta. Petroleum Technology Development Journal, 10(1), 1426. https://www.researchgate.net/publication/353465966

Alege, T. S., Tella, T. O., & Omada, J. I. (2023b). Textural and provenance studies of Ajali Sandstones Formation outcropping in Idah, Northern Anambra Basin, Nigeria. African Journal of Engineering and Environment Research. https://dx.doi.org/10.4314/jasem.v27i6.22

Alege, T. S., Tella, T. O., Aigbadon, G., & Omada, J. I. (2023a). Sedimentary facies and palynological studies of Ajali Sandstones Formation outcropping in Idah, Northern Anambra Basin, Nigeria. Nigerian Journal of Applied Science and Environmental Management, 27(6), 12071215. https://www.ajol.info/index.php/jasem/article/view/250246

Alege, T. S., Tella, T. O., & Aigbadon, G. O. (2024b). Lithofacies, bio-sequence stratigraphy and paleoenvironment of the Cretaceous-Neogene at the BG-1 well, offshore Eastern Dahomey Basin, Nigeria: Implications for future exploration and development efforts. Carbonates and Evaporites, 39, 49. https://doi.org/10.1007/s13146-024-00953-6

Alege, T. S., Shigiri, Z. A., Bello, O. A., Mujeeb, A., & Muazu, T. A. (2025). Palynostratigraphic and palynofacies framework of the Cretaceous-Paleogene offshore Dahomey Basin; Implications for paleoclimate, paleoenvironment and hydrocarbon exploration. Carbonates and Evaporites, 40, 86. https://doi.org/10.1007/s13146-025-01119-8

Alege, TS & Joseph GE (2025) "Foraminiferal Bio-sequence stratigraphy and Hydrocarbon Potential of Shale Dominated Successions in Coastal Swamp -Offshore Depobelt, Niger Delta Basin. Journal of Carbonates and Evaporites, https://doi.org/10. 1007/s13146- 025-01091-3

Alege, T. S., & Joseph, G. (2024). Palynological and paleoenvironmental analyses of the Miocene sediments of Gap-1 well in the onshore Niger Delta Basin. Scientia Africana, 23(4), 317326. https://doi.org/10.4314/sa.v23i4.27

Amogu, D., Filbrandt, J., Ladipo, K., Anowai, C., & Onuoha, K. M. (2011). Seismic interpretation, structural analysis, and fractal study of the Greater Ughelli Depobelt, Niger Delta Basin, Nigeria. The Leading Edge, 30, 640648. https://doi.org/10.1190/1.3599149

Atta-Peters, D., Agama, C. I., Asiedu, D. K., & Apesegah, E. (2013). Palynology, palynofacies and paleoenvironments of sedimentary organic matter from Bonyere Well, Tano Basin, Western Ghana. International Letters of Natural Sciences, 5, 2745.10.18052/www.scipress.com/ILNS.5.27

Batten, D. J. (1982). Palynofacies, palaeoenvironments and petroleum. Journal of Micropalaeontology, 1, https://doi.org/107114.10.1144/jm.1.1.107

Batten, D. J., & Stead, D. T. (2005). Palynofacies analysis and its stratigraphic application. In E. A. M. Koutsoukos (Ed.), Applied stratigraphy (pp. 203226). Springer. https://doi.org/10.1007/1-4020-2763-X_10

Chukwuma-Orji, J., Okosun, E., & Gana, F. (2019). Palynofacies analysis of Ida-4 well, Niger Delta Basin, Nigeria. Geology, Geophysics & Environment, 45(3), 219. https://doi.org/10.7494/geol.2019.45.3.219

Fadiya, S. L., Ogunleye, S. O., Oyelami, A. B., & Aroyewun, F. R. (2021). Palynostratigraphic and palynofacies analysis of X and Y wells, offshore Niger Delta, Nigeria. Ife Journal of Science, 22(3). https://doi.org/10.4314/ijs.v22i3.2

Faegri, K., & Iversen, J. (1989). Textbook of pollen analysis (4th ed.). John Wiley and Sons. https://doi.org/10.1177/030913339001400311

Mascle, J. (1976). Submarine Niger Delta: Structural framework. J. Min. Geol. (Socit Gologique de France), 13(1), 1228. https://archimer.ifremer.fr/doc/00000/5171/4629.pdf

Mendona Filho, J. G., Menezes, T. R., & Mendona, J. O. (2011). Organic composition (palynofacies analysis). In ICCP Training Course on Dispersed Organic Matter, Chapter 5. Palynofacies and Organic Facies Laboratory (LAFO), Federal University of Rio de Janeiro (UFRJ), & Petrobras Research Center (CENPES), Brazil.https://www.researchgate.net/publication/284309471_Organic_composition_palynofacies_analysis

Mendona Filho, J. G., Menezes, T. R., Mendona, J. O., Oliveira, A. D., Silva, T. F., Rondon, N. F., & Sobrinho da Silva, F. (2012). Organic facies: Palynofacies and organic geochemistry approaches. IntechOpen. https://doi.org/10.5772/47928

Nton, M. E., & Ogungbemi, T. S. (2011). Sequence stratigraphic framework of K-field in part of Western Niger Delta. RMZ Materials and Geoenvironment, 58(2), 163180. https://www.dlib.si/stream/URN:NBN:SI:DOC-6MR015FK/a3ed5cb4-5d3a-4843-a486-aefa786953fb/PDF

Obaje, N. G. (2009). Geology and mineral resources of Nigeria. Springer.https://link.springer.com/book/10.1007/978-3-540-92685-6

Obasuyi, O. F., Abiola, O., Egbokhare, J., Ifanegan, A., & Ekere, J. (2019). 3D seismic and structural analysis of Middle Agbada Reservoir Sand, offshore Niger Delta, Nigeria. Journal of Geography, Environment and Earth Science International. https://doi.org/10.9734/JGEESI/2019/v20i330108

Odoma, A. N., & Aigbadon, G. O. (2024). Palyno-maceral composition of the shale unit of Mamu Formation exposed at Ojuwo-Olijo, Northern Anambra Basin, Nigeria. Benin Journal of Physical Sciences, 1(2), 121. https://publications.bjps.org.ng/palyno-maceral-composition-shale-unit-mamu-formation-exposed-ojuwo-olijo-northern-anambra-basin

Ogbahon, O. A., Fola-Dara, A. O., & Enweliku, D. S. (2019). Palynostratigraphy, paleoclimate and paleoenvironment of a segment of GBO-04 well, onshore western Niger Delta Basin, Nigeria. Journal of Geology & Geophysics, 8(2), 463. https://www.longdom.org/open-access/palynostratigraphy-paleoclimate-and-paleoenvironment-of-a-segment-of-gbo04-well-onshore-western-niger-delta-basin-nigeria-44697.html

Olatunji, O. A. (2022). Palynofacies and environment of deposition of HA-001 Well, Shallow offshore Western Niger Delta Basin, Nigeria. AJOSR, 4(1), 6877. http://dx.doi.org/10.18280/eesrj.090404

Onyeachonam, N., & Fregene, T. J. (2021). Palynofacies analysis, organic thermal maturation, and kerogen type of Upper Cretaceous-Paleocene rocks in Auchi Sheet 266, Benin Flank, western extension of the Anambra Basin, southwestern Nigeria. International Journal of Science and Advanced Research, 2(7), 18611869. https://www.scienceijsar.com/sites/default/files/article-pdf/IJSAR-0643.pdf

Oretade, B. S., & Ali, C. A. (2021). Calcareous nannofloras in Western Lobe Offshore, Niger Delta: Eutrophication and climate change implications. Malaysian Journal of Society and Space, 17(4), 274287. https://core.ac.uk/download/511435979.pdf

Oyede, A. C. (1991, November). Palynofacies in Deltaic Stratigraphy. Paper presented at the 1991 NAPE Conference.

Oyede, A. C. (1992). Palynofacies in deltaic stratigraphy. Nigerian Association of Petroleum Explorationists Bulletin, 7, 1016.

Short, K. C., & Stauble, A. J. (1967). Outline of geology of Niger Delta. AAPG Bulletin, 51(5), 761-779. https://archives.datapages.com/data/bulletns/1965-67/data/pg/0051/0005/0750/0761.htm?doi=10.1306%2F5D25C0CF-16C1-11D7-8645000102C1865D

Thomas, M. L., Pocknall, D. T., Warney, S., Bentley, S. J., Droxler, A. W., & Nittrouer, C. A. (2015). Assessing palaeo-bathymetry and sedimentation rates using palyno-marceral analysis: A study of modern sediments from the Gulf of Papua, offshore Papua New Guinea. Palynology, 39(3), 124. http://dx.doi.org/10.1080/01916122.2015.1014526

Tyson, R.V. (1995). Introduction: The Importance of Sedimentary Organic Matter. In: Sedimentary Organic Matter. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0739-6_1

Tyson, R. V. (1993). Palynofacies analysis. In D. G. Jenkins (Ed.), Applied micropaleontology (pp. 153191). Kluwer Academic Publishers. https://link.springer.com/chapter/10.1007/978-94-017-0763-3_5

William, T. E., Alege, T. S., Jimoh, A. O., & Musa, O. K. (2024). Geotechnical Assessment of Residual Clay in Zariagi, Lokoja, North-Central Nigeria: Implication for Industrial Applications. FUDMA journal of sciences, 8(5), 17-24. https://doi.org/10.33003/fjs-2024-0805-2687

Published

16-07-2025

How to Cite

PALYNOFACIES ANALYSIS OF PSA-1 WELL SEDIMENTS, NIGER DELTA BASIN: IMPLICATIONS FOR PALEOENVIRONMENTAL RECONSTRUCTION. (2025). FUDMA JOURNAL OF SCIENCES, 9(7), 172-183. https://doi.org/10.33003/fjs-2025-0907-3657

Issue

Vol. 9 No. 7 (2025): FUDMA Journal of Sciences - Vol. 9 No. 7

Section

Review Articles
Copyright & Licensing

FUDMA Journal of Sciences

How to Cite

PALYNOFACIES ANALYSIS OF PSA-1 WELL SEDIMENTS, NIGER DELTA BASIN: IMPLICATIONS FOR PALEOENVIRONMENTAL RECONSTRUCTION. (2025). FUDMA JOURNAL OF SCIENCES, 9(7), 172-183. https://doi.org/10.33003/fjs-2025-0907-3657