Estimation of Pore Pressure Regime - Bentiu1 Formation - A Sudanese reservoir

Abstract

This research provides a practical simple numerical equation for estimating pore/formation pressure in “Bentiu-1 formation - Bamboo West field”. The base of the work is the ratio between the pressure (P), Bulk density (ρ), Depth (h) and the acceleration gravity (g), where the terms (ρ) and (h) represented by: Deep resistivity , Sonic and Bulk density logs data. Two different numerical methods were used to generate the final equation and “Error Analysis” was done to compare between them and reach the best model. Then “Surfer-8” software was used to create the pore pressure distribution contour map of the study area. This method can be applied during the early life of proposed oil field to give an initial prospective of how much pressure distribution could be within any formation since the field has no enough data for using other methods. Also this new method will safe cost and times and considered as a huge and real plus to oil industry in Sudan for the best sake and development of our own country. The study show that both sonic and resistivity log data can be used to estimate the pore pressure for this formation with 1.13% and 1.16%, respectively, using mean absolute percentage error (MAPE). And the calculated pressure distribution contour maps for both Sonic and Resistivity equations, using Surfer software, are look similar to those plotted for the real pressure in Bentiu-1 formation.