Formation Pore Pressure Variation of the Neocomian Sedimentary Succession (the Fahliyan Formation) in the Abadan Plain Basin, SW of Iran

Figure 5

The pressure versus depth plot of the Lower Fahliyan reservoir from six different fields, zoomed in from Figure 4, showing a multilayered stacked reservoir with different pressures. The reservoir pressure decreases downward in a step-wise pattern. Also, the main pressure step can be seen clearly in wells A-6, A-8 (field A), B-2 (field B), and C-1 (field C) but not in wells D-1 (field D), I-1 (field I), and J-1 (field J) due to facies change of Fahliyan to Garau. The main pressure step suggests the presence of a regional efficient seal dividing the Lower Fahliyan reservoir into two stacked compartments. The pressure trend of the sublayers of each compartment in different fields shows more or less a similar trend. The hydrostatic pressure (blue line) has been attached as a reference line.