The Effect of Diagenetic Minerals on the Petrophysical Properties of Sandstone Reservoir: A Case Study of the Upper Shallow Marine Sandstones in the Central Bredasdorp Basin, Offshore South Africa
Abstract
:1. Introduction
2. Location of the Study Area and the Geological Background
3. Materials and Methods
3.1. Petrophysical Evaluation
3.1.1. Volume of Clay Determination
3.1.2. Wireline Log and Core-Derived Porosity Determination
3.1.3. Water Saturation Determination
3.1.4. Permeability Determination
3.2. Core Description
3.3. Mineralogy Analyses
4. Results
4.1. Relationship between Core Porosity and Core Permeability
4.2. Petrophysical Analysis
4.2.1. Well ZN1 Interpretation
4.2.2. Well ZN3 Interpretation
4.2.3. Well ZN4 Interpretation
4.3. Mineralogical Analyses
4.3.1. Detrital Minerals
4.3.2. Diagenetic Minerals
4.4. Clay Mineral Cementation
Smectite and Illite Clays
4.5. Cement of Sandstone
5. Discussion
6. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Well Name | Reservoir Name | Top Depth (m) | Bottom Depth (m) | Gross Thickness (m) | Φ (%) | Sw (%) | Vcl (%) | K (mD) |
---|---|---|---|---|---|---|---|---|
ZN1 | 1AT1 | 3615.5 | 3685.1 | 69.9 | 10.8 | 25.5 | 23.3 | 0.096 |
ZN3 | 1AT1 | 2610.3 | 2720.4 | 110.1 | 16.6 | 12.5 | 17.4 | 151.8 |
ZN4 | 1AT1 | 4081 | 4246.7 | 165.7 | 8.7 | 30.4 | 8.6 | 0.093 |
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Magoba, M.; Opuwari, M.; Liu, K. The Effect of Diagenetic Minerals on the Petrophysical Properties of Sandstone Reservoir: A Case Study of the Upper Shallow Marine Sandstones in the Central Bredasdorp Basin, Offshore South Africa. Minerals 2024, 14, 396. https://doi.org/10.3390/min14040396
Magoba M, Opuwari M, Liu K. The Effect of Diagenetic Minerals on the Petrophysical Properties of Sandstone Reservoir: A Case Study of the Upper Shallow Marine Sandstones in the Central Bredasdorp Basin, Offshore South Africa. Minerals. 2024; 14(4):396. https://doi.org/10.3390/min14040396
Chicago/Turabian StyleMagoba, Moses, Mimonitu Opuwari, and Kuiwu Liu. 2024. "The Effect of Diagenetic Minerals on the Petrophysical Properties of Sandstone Reservoir: A Case Study of the Upper Shallow Marine Sandstones in the Central Bredasdorp Basin, Offshore South Africa" Minerals 14, no. 4: 396. https://doi.org/10.3390/min14040396