International Journal of Advanced Multidisciplinary Research and Studies
Volume 2, Issue 4, 2022
Overpressure zone Detection/Pore pressure prediction in an offshore Niger Delta field using Drilling and Petrophysics parameters
Author(s): Adetokunbo Falade, Oluwatoyin Akinsete, Rotimi IA
It has been evaluated that over pressured matrix formations are identified with deep water Niger Delta basins given a normal average pressure gradient of 0.64psi/ft. Conventionally, a pressure gradient greater than this is known to be taken as an abnormal over pressured zone. This will then serve as a resource description in a log enhanced data/ information of a subsurface as a hydrocarbon prospective prediction / prediction evaluation.
In this study, the plot of depth against pore pressure from the depth of 2460 m at which parameters were taken were recorded to the depth of 3674m. Therefore, it should be observed that the pore pressure increased following a normal trend until it reaches a depth of 2975m where the deviation from the usual trends till it reaches a depth of 2975m where the deviation commenced, this trend therefore continues gradually till it reaches 3670m where a significant increase of pore pressure from 9.8ppg to 12.9ppg at 3674m was observed.
Keywords: Drilling, Petrophysics, Offshore, Pore pressure
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