Lithofacies characterization of sedimentary succession from Late Cretaceous-Tertiary age in Benin west-1, northern Depobelt, Anambra Basin, Nigeria

Lucas, F.A.; Odedede, O.

doi:10.1260/1708-5284.9.6.513

Cited by 3 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Grain size and coarsening/fining upward motifs indicate distributary/fluvial channel (Table 4) and barrier bar deposits of lower coastal plain settings [20,21]. The lower section (1034 -2649 m) which belongs to Imo Shale, consists of both terrestrial organic matter, Monoporites annulatus, fossil shell fragments, foraminiferal wall linings and dinoflagellate cysts [4,16]. These sedimentary and palynological features suggest proximity to the paleo -shoreline [4,22].…”

Section: Paleoenvironmental Implicationsmentioning

confidence: 99%

Chemostratigraphy of Sediments in Benin West -1, Benin Flank: Paleoenvironmental Implications

Odedede

2016

J. Sci. Res.

Self Cite

View full text Add to dashboard Cite

Chemostratigraphical study was carried out on sediments of Benin west -1 well in order to understand their paleoenvironmental setting and geochemical zonations. Six chemozones (CHM 1, CHM 2, CHM 3, CHM 4, CHM 5 and CHM 6) were recognized in the stratigraphic column. Sedimentological attributes and maxima peaks and / or fluctuating trends of Zn, SiO 2 , K 2 O, Sr adjudged CHM 3 zone as a potential lowstand systems tract. Synergy of sedimentological and chemostratigraphical fingerprints suggests a marine to distributary channel environment of deposition.

show abstract

Section: Paleoenvironmental Implicationsmentioning

confidence: 99%

Chemostratigraphy of Sediments in Benin West -1, Benin Flank: Paleoenvironmental Implications

Odedede

2016

J. Sci. Res.

Self Cite

View full text Add to dashboard Cite

show abstract

“…According to Aswal, palynofossils play a very significant role in dating sequence stratigraphic surfaces and in understanding the process sedimentology [1]. The Anambra Basin has been investigated by previous workers [2,3] as a result of renewed interest in the exploration for oil and gas due to Federal Government of Nigeria comparative advantage for these resources. This necessitated the revisit to abandon well (Benin west-1).…”

Section: Introductionmentioning

confidence: 99%

Palynological Zonations and Sequence Stratigraphic Analysis of Sediments in Benin West-1, Anambra Basin, Nigeria

2016

Self Cite

View full text Add to dashboard Cite

Palynoflora analyses from Benin west -1, Anambra Basin has unfold three palynozones based on abundance, composition of palynoflora and cluster analysis. Palynozone-1 has been dated as Late Maastrichtian age and belong to the lowermost Imo Shale, palynozone-2; Middle Eocene and palynozone -3 is dated Lutetian to Bartonian age. Sediments between depth intervals of 2649-2560 m is marked a sequence boundary, 1650-2560 m, and 970-1190 m is delineated as high stand system tract. Shaly intervals from the depth of 1644 m, and 1234 m recorded acme of palynoflora (Zonocostites ramonae, Monoporites annulatus, Verrucatosporites spinosus, Botryococcus braunii) and probably fingerprints a condensed section. The condensed section intervals (1644 m and 1234 m) may depict good source rock and exploration targets.

show abstract

Seismic net-to-gross estimation for a geologic model update: A case study from a turbidite lobe reservoir in the deepwater of the Niger Delta

Olagundoye,

Akhajeme,

Yusuf

et al. 2024

Interpretation

View full text Add to dashboard Cite

Geological model updates are routinely performed in mature fields to obtain improved descriptions of facies distributions and reservoir properties such as volume of shale, net-to-gross (NTG), porosity, etc., for better understanding of the static and dynamic behaviors of reservoirs for effective well placement, improved production, and monitoring. A simple but integrated seismic NTG estimation approach, using detuned seismic amplitudes was employed in guiding NTG modeling during the geological model update of a thin turbidite lobe reservoir in a mature oil field in the deep offshore Niger Delta. The objective was to address NTG overestimation and gross rock volume (GRV) uncertainty in a previous model arising from seismic amplitude tuning effects. A seismic NTG approach was chosen relative to sophisticated deterministic or stochastic inversion techniques to avoid tuning effects which usually bias NTG estimates in thin turbidite reservoirs. The primary dataset was a 2019 reprocessed Prestack Depth Migrated (PSDM) seismic data vintage which had better resolution, higher signal-to-noise ratio (SNR), and more appropriate angle-stack apertures for amplitude versus angle (AVA) fidelity, than the older 2011 PSDM seismic data that was used in the previous geological model. The methodology involved rock physics analysis, seismic data quality checks, tuned area determination, detuning of composite seismic amplitudes of the top and base reservoir, and their direct calibration to NTG at wells. Good correlations were obtained between the detuned composite seismic amplitudes and NTG at wells. The seismic NTG map showed good calibrations at wells and provided a robust trend for net sand modelling in the oil pool and aquifer. Static model QCs and dynamic simulations proved that the seismic NTG attribute addressed the GRV uncertainty in the earlier model, thus giving confidence for use of the updated model for the planning and geosteering of infill wells, sand completions, reservoir monitoring, and production.

show abstract

Lithofacies characterization of sedimentary succession from Late Cretaceous-Tertiary age in Benin west-1, northern Depobelt, Anambra Basin, Nigeria

Cited by 3 publications

References 1 publication

Chemostratigraphy of Sediments in Benin West -1, Benin Flank: Paleoenvironmental Implications

Chemostratigraphy of Sediments in Benin West -1, Benin Flank: Paleoenvironmental Implications

Palynological Zonations and Sequence Stratigraphic Analysis of Sediments in Benin West-1, Anambra Basin, Nigeria

Seismic net-to-gross estimation for a geologic model update: A case study from a turbidite lobe reservoir in the deepwater of the Niger Delta

Contact Info

Product

Resources

About