Porosity - Permeability Relationship of Libyan Carbonate Reservoir in Defa Oil Field

Saleh Arwini¹

Section:Research Paper, Product Type: Journal-Paper
Vol.7 , Issue.2 , pp.32-44, Jun-2020

Online published on Jun 30, 2020

Copyright © Saleh Arwini . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
Proper understanding of permeability and permeability distribution is critical to effective carbonate reservoir description. The relation between porosity and permeability parameters in carbonated rocks is complicated, indistinct and very difficult to characterize because of their tendency to be tight and heterogeneous due to depositional environment and diagenetic processes. In this paper, the aim was to develop a permeability predictive model for one of Libyan carbonate reservoirs (Defa Oil Field) using the principle of Hydraulic Flow Units (HFUs). This relation will enhance the reservoir description since it considers the entire spread of porosity and permeability data if each Hydraulic Unit (HU) can be recognized across the field. In this study, the available core data from two key wells of Defa oil field were used to develop permeability model based on Hydraulic Flow Unit Method. Histogram analysis, probability analysis and Log-Log plot of Reservoir Quality Index (RQI) versus normalized porosity (?z) are presented to identify optimal hydraulic flow units. The results have shown that the HU process based on Flow Zone Indicator (FZI) was successfully applied for studied case from Defa carbonate rocks and they worked perfectly to characterize permeability with good correlation coefficient for each HFU (R2 ≥ 0.9). Flow Zone Indicator (FZI) is an effective and suitable parameter in correlating rock properties because it is based on pore throat radius and geometry of porous medium that related to petrophysical rock types.

Key-Words / Index Term :
Permeaxbilty, Porosity, Hydraulic Flow units, Reservoir Quality Index, Flow Zone Indicator, Libyan carbonate reservoir

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