Geomechanical Characterization of a Reservoir in Part of Niger Delta, Nigeria
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Date
2018-08-19
Journal Title
Journal ISSN
Volume Title
Publisher
Ajast
Abstract
Geomechanical characterization of a reservoir in the Niger Delta basin, using geophysical well-logs was adequately evaluated. The deformability and
strength of delineated unconsolidated sandstone and compacted shale were investigated by determined elastic moduli (Poisson ratio, Young modulus,
Bulk modulus, Shear modulus and Compressibility) and the unconfined compressive strength (UCS), cross plots of the parameters were done for
validation. Sand production prediction was used to adequately analyse sanding. The results show average parameters of weakly cemented sand to
have lower Poisson ratio, Young, Bulk, Shear modulus and Unconfined compressive strength of magnitudes of 0.28, 2.4GPa, 10.5GPa, 6.83GPa,
14.44MPa respectively, high compressibility (0.1 GPa-1), and porosity (0.25) the compacted shale have higher Poisson ratio, Young, Bulk, Shear
modulus and rock strength as (0.35, 8.93GPa, 18.08GPa, 21.01GPa, 56.17MPa respectively, lower compressibility (0.06 GPa-1) and porosity (0.06).
The shale has maximum average rock strength value of 56.17MPa.These results can be useful in the planning of well drilling and sanding prediction
in the study area.
Description
Keywords
Elastic moduli, Geomechanical characterization, Niger Delta, Petro physical properties, Sand production prediction and geophysical well logs
Citation
Lawson-Jack, O., Uko, E. D., Tamunobereton-Ari, I., & Alabraba, M. A. Geomechanical Characterization of a Reservoir in Part of Niger Delta, Nigeria.