Application of 3D Seismic Attribute Analyses for Hydrocarbon Prospectivity in Uzot-Field, Onshore Niger Delta Basin, Nigeria

Omoja, U. C.; Obiekezie, T. N.

doi:10.1155/2019/1706416

Cited by 15 publications

(11 citation statements)

References 13 publications

(13 reference statements)

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“…Root mean square amplitude is used as a good indicator of the presence of hydrocarbon in seismic data [19]. The result of this research compares favorably with that obtained by other researchers [2,10,21,34].…”

Section: Seismic Attributessupporting

confidence: 81%

“…The high values of RMS amplitudes may also be related to high porous sands, which are potential hydrocarbon reservoirs. RMS amplitude is similar to reflection strength and it is used in seismic exploration for delineating bright spots and amplitude anomalies [14,21,22]. The RMS amplitude is may be used for identifying coarser-grained facies, compaction related effects, and unconformities.…”

Section: Seismic Attributesmentioning

confidence: 99%

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Identification of seismic attributes for hydrocarbon prospecting of Akos field, Niger Delta, Nigeria

Emujakporue

Enyenihi

2020

SN Appl. Sci.

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In this study, we have extracted and analyzed four seismic attributes of Akos oil field to obtain more information about the structures, stratigraphy and hydrocarbon potential of the Akos field from available seismic and a suite of well logs data. Two lithology and reservoirs were delineated from the well logs. Two horizons and growth faults were identified in the seismic sections. For a comprehensive analysis of the structural and stratigraphic understanding of the reservoirs, four seismic attributes variance edge, sweetness, root mean square and relative acoustic impedance were applied to the seismic data. The Variance edge analysis was used to delineate the prominent and subtle faults in the area. The high sweetness regions in the seismic data indicate high amplitude which indicates the presence of hydrocarbon-bearing sand units. The root mean square amplitude analysis also indicates the presence of hydrocarbon in seismic data. The relative acoustic impedance analysis was used for delineating lithology variation in the seismic sections. The result of the seismic attribute analysis has shown that the Akos field has good hydrocarbon prospects.

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Section: Seismic Attributessupporting

confidence: 81%

Section: Seismic Attributesmentioning

confidence: 99%

Identification of seismic attributes for hydrocarbon prospecting of Akos field, Niger Delta, Nigeria

Emujakporue

Enyenihi

2020

SN Appl. Sci.

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“…Similar E-W trending major growth faults were reported by Oresajo, B. S. et al [28] in Emi Field within Offshore Depobelt in the eastern Niger Delta. Omoja, U. C. and Obiekezie, T. N. [29] also found rollover anticlinal structures within the central part of Uzit Field in onshore Niger Delta basin.…”

Section: Seismic Interpretation Aspectmentioning

confidence: 84%

Geological and Seismic Delineation of D2000 and D4000 Petroleum Reservoirs Within Afenmai Field, Niger Delta Basin, Nigeria

Unuevho¹,

Onuoha²

2022

EARTH

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Afenmai Field is an old petroleum discovery within Central Swamp Depobelt on the eastern part of the Nigerian Niger Delta basin. Eight wells were drilled within the field, and Wells 006 and 008 respectively encountered petroleum in the D2000 Sand and D4000 Sands. This study was conducted to firm up the reservoirs' spatial extent as well as their pore fluid distribution, which has hitherto been unattended to. To achieve this, the reservoirs were correlated within a framework of parasequence sets that was created from sequence stratigraphic interpretation of combined lithologic, geophysical and foraminiferal data. The reservoir tops were then tied at Well 008 to seismic reflections within a 3D seismic volume, and mapped through the volume. Root mean square (RMS) amplitude was extracted from the seismic volume along mapped reservoir surface. The depth maps produced reveal a southward concave, major synthetic structure building fault across the entire field. A series of en echelon synthetic faults are revealed on the NW and SE of the upthrown block of the major synthetic structure building fault. The D2000 Sand constitutes a rollover anticline with entrapped saturated petroleum in a fourway anticlinal closure that lacks fault support. The western, eastern and northern parts of the reservoir are yet to be penetrated by a well. Petroleum is entrapped in a three-way closure within the D4000 Sand in the western part of the upthrown block of the major synthetic structure building fault. Average RMS amplitude characterise the petroleum reservoir at Well 008 location and immediate vicinity. The values become low westward within the delineated reservoir. Opportunity for productive drilling exists within the undrilled part of the delineated reservoir, westward of Well 008. Opportunities for productive drilling also exist within the undrilled western, eastern and northern parts of the delineated D2000 reservoir sand.

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“…Description of Study Area: Uzot-field is located at the western Coastal Swamp Depobelt of the onshore Niger Delta Basin, Nigeria (fig 1). The subsurface structure of the field indicates the presence of down-to-basin footwall and hanging wall faults associated with rollover anticlines and horst-block (back-to-back fault) (Omoja and Obiekezie, 2019). Data Collection and analysis: Well log data from sonic, gamma ray, matrix density and resistivity logs from four deep wells in Uzot field were used in the analysis.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of Petrophysical Parameters of Reservoir Sand Wells in Uzot-Field, Onshore Niger Delta Basin, Nigeria

Omoja¹,

Obiekezie²

2021

jasem

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Evaluation of the petrophysical parameters in Uzot-field was carried out using Well log data. The target for this study was the D3100 reservoir sand of wells Uz 004, Uz 005, U008 and Uz 011 with depth range of 5540ft to 5800ft across the four wells. Resistivity logs were used to identify hydrocarbon or water-bearing zones and hence indicate permeable zones while the various sand bodies were then identified using the gamma ray logs. The results showed the delineated reservoir units having porosity ranging from 21.40% to 33.80% indicating a suitable reservoir quality; permeability values from 1314md to 18089md attributed to the well sorted nature of the sands and hydrocarbon saturation range from 12.00% to 85.79% implying high hydrocarbon production. These results suggest a reservoir system whose performance is considered satisfactory for hydrocarbon production. Keywords: Petrophysical parameters, porosity, permeability, hydrocarbon saturation, Niger Delta Basin

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Application of 3D Seismic Attribute Analyses for Hydrocarbon Prospectivity in Uzot-Field, Onshore Niger Delta Basin, Nigeria

Cited by 15 publications

References 13 publications

Identification of seismic attributes for hydrocarbon prospecting of Akos field, Niger Delta, Nigeria

Identification of seismic attributes for hydrocarbon prospecting of Akos field, Niger Delta, Nigeria

Geological and Seismic Delineation of D2000 and D4000 Petroleum Reservoirs Within Afenmai Field, Niger Delta Basin, Nigeria

Evaluation of Petrophysical Parameters of Reservoir Sand Wells in Uzot-Field, Onshore Niger Delta Basin, Nigeria

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