Sequence stratigraphy of Iso field, western onshore Niger Delta, Nigeria

Bassey, CE; Fagbola, O

doi:10.4314/jmg.v38i1.18773

Cited by 4 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results are consistent with the heterogeneous stratigraphy typical of Niger Delta consisting of alternating sand, silt and clay sequences [23]. Similar interbedded textural patterns within comparable deltaic deposits have been reported by previous researchers across the Niger Delta region [4,15].…”

Section: Grain Size Analysis Of Sub-soil Strata Of the Sitessupporting

confidence: 91%

“…The town falls within the geological setting of the Niger Delta basin, which is a Tertiary deltaic depositional environment along the Gulf of Guinea coast in southern Nigeria [2,3]. The subsurface at the site consists of interlayered sequences of poorly consolidated sands, silty sands, sandy clays, and soft clays, which are typical of the heterogeneous alluvial stratigraphy of the Niger Delta [4,5,1]. These soft soil deposits are characterized by high moisture content, high compressibility, low shear strength, and high potential for consolidation settlement [6,1].…”

Section: Site Location Descriptionmentioning

confidence: 99%

“…By providing a practical and cost-effective alternative to direct Vs measurement, these tools can significantly enhance the ability of engineers to characterize soil conditions and inform critical design and decision-making processes, particularly in data-scarce regions like the Niger Delta. The Niger Delta basin in southern Nigeria is a Tertiary-aged deltaic depositional system [4,5] consisting of inter-bedded sequences of poorly consolidated sands, silts and clays [6]. Extensive oil and gas production activities have necessitated thorough geotechnical investigations of the delta subsurface [11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Estimation of Dynamic Soil Properties for Geotechnical Analysis in the Niger Delta Using Index Testing and Empirical Correlations

Kennedy

2024

Preprint

View full text Add to dashboard Cite

This study investigated geotechnical properties of subsurface soils from Mbiama town in Rivers State, Niger Delta region through laboratory index testing and development of empirical correlations to estimate dynamic soil parameters. Grain size analyses revealed heterogeneous stratigraphy transitioning from upper clayey sands to lower gravelly sands deposited under changing fluvio-deltaic conditions. Atterberg limits exhibited decreasing plasticity trends with depth confirming the textural variations. Laboratory data conforms to layering architecture inferred from depositional facies analyses. Predictive models were developed relating Standard Penetration Test blow counts (SPT-N) and shear wave velocity (Vs) to depth, moisture content and percentage sand. High regression coefficients validated models' accuracy in reproducing over 90% of field measurements. Factor of safety against liquefaction was correlated to SPT-N, accounting for density-dependent properties. Index-based characterizations aligned well with trends predicted by the empirical correlations. This research demonstrated robust indirect estimation of dynamic geotechnical indices for foundation design and seismic risk analysis in data-scarce Niger Delta through standardized field and laboratory index testing integrated with depositionally-linked predictive models.

show abstract

Section: Grain Size Analysis Of Sub-soil Strata Of the Sitessupporting

confidence: 91%

Section: Site Location Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Estimation of Dynamic Soil Properties for Geotechnical Analysis in the Niger Delta Using Index Testing and Empirical Correlations

Kennedy

2024

Preprint

View full text Add to dashboard Cite

show abstract

“…The petroleum geology and exploration history of this highly prolific proximal belt are well documented in Knox and Omatsola (1989), Bassey and Ojesina (1999), Bassey and Fagbola (2002) and Udoh et al (2017 a, b). The study area is "X" Field, (Total Nigeria PLC who provided the data requested that the area be so named) ( Figure 3) and falls within the proximal offshore portion of Niger Delta, with an area of 230 km 2 .…”

Section: Location Of the Study Areamentioning

confidence: 96%

Sequence stratigraphic study of X field in eastern offshore of Niger Delta, Nigeria

Udoh¹,

Bassey²,

Ekot³

et al. 2020

J. Geol. Min. Res.

View full text Add to dashboard Cite

An integrated approach to Seismic interpretation that combines techniques of sequence stratigraphic analysis, seismic facies analysis and attribute analysis is one of the most effective approaches for hydrocarbon exploration in growth-faulted deltaic strata of offshore eastern Niger Delta. These strata are generally thick paralic/marine units deposited along an unstable progradational continental margin. Here, shale ridges, toe thrusts and diapirism are common features. Thus, system tracts along this margin differ significantly from those described for classic stable progradational continental margins. Development of good reservoir sands, on the shales of the upper transgressive systems tract form barriers which are good, particularly on the outer shelf where high stand systems tract sediments accumulate. Alternation of the high stand systems tract sands and transgressive systems tract shales provides a bridge linking reservoir facies with the shales or seals of TST which is essential for hydrocarbon accumulation and its stratigraphic trapping in the study field. This work has provided an analytical model for a detailed and cost-effective hydrocarbon prospecting through the use of sequence stratigraphic framework in tandem with seismic data interpretation.

show abstract

“…Therefore, the shale of the TST forms the seal for the potential traps in the study area. The alternation of the HST and TST sands and shale, therefore, provide a combination of reservoirs, source and seal rocks that are essential for hydrocarbon accumulation and trapping in the Vim Field (e.g., Bassey and Fagbola, 2002;Anakwuba et al, 2008;Chima et al, 2017;Ogbe, 2020).…”

Section: 13: Structural Frameworkmentioning

confidence: 99%

Reservoir and sequence stratigraphic analysis using subsurface data

Vivian

Kelechi

Lanisa

et al. 2023

Preprint

View full text Add to dashboard Cite

There is a growing interest in the Niger Delta hydrocarbon field exploration and exploitation. With growing interest in proven field prospects and confirmed reservoir facies, there is a need for improved basin and field scale reservoir identification, analysis, and assessment. The Agbada Formation of the middle Miocene age across Vim Field, in the western part of the coastal swamp depobelt was studied using wire-line logs, 3D seismic and biostratigraphic data. This contribution evaluated stratigraphic configuration, structural style, facies geometry, hydrocarbon leads, and distribution. The method adopted involves delineating lithologies from the gamma-ray log, identifying reservoirs from the resistivity and gamma ray logs, well top correlation using gamma ray logs, horizon and fault mapping, time to depth conversion of maps using velocity model, attribute analysis, and sequence stratigraphic analysis. Bounding surfaces were mapped on the seismic section, and well correlations were conducted and integrated with a paleobathymetry chart to highlight the depositional environments. Eight major stratigraphic bounding surfaces (four sequence boundaries and four maximum flooding surfaces) were identified. Erosional bounding surfaces were mapped as interest surface horizons. Analysis of the vertical succession of depositional facies revealed five 3rd order depositional sequences of Mid-Miocene age-bound SB and MFS chronologically. Three strata stacking patterns (progradational, retrogradation, and aggradational) were delineated and interpreted as lowstand systems tract (LST), highstand systems tract (HST), and transgressive systems tract (TST). The alternation of the reservoir sands of the HST and TST and the shale units of the TST offers good traps for hydrocarbon. Fault analysis revealed regional growth faults, counter-regional growth faults, synthetic and antithetic faults that show foot walls and hanging walls dominating the mainly extensional zone. These faults play a major role in hydrocarbon trapping within the area. The depositional environment spans from shelf to slope margin, with sediments deposited within the Inner neritic through the middle neritic to the outer neritic settings. Interpretative observation shows that thin-bedded shale facies complexly intercalate the reservoir facies of the TST. Thus careful evaluation of such reservoirs is recommended before making exploitation decisions.

show abstract

Sequence stratigraphy of Iso field, western onshore Niger Delta, Nigeria

Cited by 4 publications

References 0 publications

Estimation of Dynamic Soil Properties for Geotechnical Analysis in the Niger Delta Using Index Testing and Empirical Correlations

Estimation of Dynamic Soil Properties for Geotechnical Analysis in the Niger Delta Using Index Testing and Empirical Correlations

Sequence stratigraphic study of X field in eastern offshore of Niger Delta, Nigeria

Reservoir and sequence stratigraphic analysis using subsurface data

Contact Info

Product

Resources

About