Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/794
Title: Reservoir Fluid Determination from Angle Stacked Seismic Volumes in ‘Jay’ Field, Niger Delta, Nigeria
Authors: Adeoti, L
Allo, O. J
Ayolabi, E. A
Akinmosin, A
Oladele, S
Oyeniran, T
Ayuk, M. A
Keywords: Amplitude Variation with Angles
Elastic Impedance
Near and Far offsets
Full stack seismic volume
Issue Date: Apr-2018
Publisher: JASEM
Citation: Adeoti, L; Allo, O. J, Ayolabi, E. A, Akinmosin, A, Oladele, S, Oyeniran, T, and Ayuk, M. A (2018). Reservoir Fluid Determination from Angle Stacked Seismic Volumes in ‘Jay’ Field, Niger Delta, Nigeria. JASEM. Vol. 22 (4) 453 – 458.
Series/Report no.: 22;4
Abstract: The study was carried out to investigate the dissimilar seismic amplitude responses observed in sandstone reservoirs with the same fluid saturation. This challenge now informed the analysis of different amplitude responses from the ‘Jay’ Field in order to verify the reservoirs fluids around and away from well location based on the integration of Amplitude Variation with Angle (AVA) and seismic inversions. The well log data provided were used to identify hydrocarbon bearing zones and Poisson Ratio analysis. Anomalies from the AVA analysis were investigated using the elastic impedance inversion of the near and far volumes. Crossplots of Lambda-Mu-Rho inversion were produced to relate reservoir incompressibility and rigidity modulus for lithology and fluid determination. Sand E exhibited amplitude increase with angles at well point and also away from well location (red triangle). The approximate elastic impedances of the inverted seismics are almost similar to the log estimates, an indication of good correlation. Integration of incompressibility (Lambda-Rho) and rigidity (Mu-Rho) modulus analyses reveals the presence of gas saturation in reservoir Sand G because low Lambda-Rho coincides with high Mu-Rho from both log estimates and inverted seismics. In the case of Sand D, high Lambda-Rho coincides with high Mu-Rho because it is oil saturated. This study has helped to differentiate the fluids in Sands D and G despite having similar AVA responses. The methods adopted in this work can be useful in hydrocarbon detection from seismic data in fields with similar geological setting.
URI: http://localhost:8080/xmlui/handle/123456789/794
ISSN: 1119-8362
Appears in Collections:Geophysics

Files in This Item:
File Description SizeFormat 
170458-Article Text-438016-1-10-20180503.pdf2.45 MBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.