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VOL. 1, ISSUE 3 (2025)
Geological modelling of overpressures in tertiary deltas: Application of a one-dimensional fit-for-purpose model
Authors
Pratap V. Nair
Abstract
A model has been developed to calculate the
overpressure history of low-permeability sediments found in undercompacted
regions. It employs user-defined relationships that describe the correlation
between porosity/permeability and effective stress. This model has been
effectively validated in wells located in the Niger and Baram deltas. As the modelling
process facilitates the estimation of both upper and lower limits of
overpressures in a new exploration well, it establishes an uncertainty
envelope. The most crucial factor influencing its implementation success is
prior knowledge of the stratigraphy. An illustration from the Niger Delta
demonstrates how modelling, in conjunction with formation-strength analysis, reduces
uncertainties in overpressure predictions. Furthermore, the model indicates a
zone of enhanced retention capacity within a sand-rich sequence at greater
depths, which favourably affects exploration potential. Based on my experience,
it is advisable to integrate geologic modelling into routine pore-pressure
prediction during exploration.
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Pages:1-4
How to cite this article:
Pratap V. Nair "Geological modelling of overpressures in tertiary deltas: Application of a one-dimensional fit-for-purpose model". International Journal of Research in All Subject, Vol 1, Issue 3, 2025, Pages 1-4
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