Petrophysical rock typing based on the digenetic effect of the different microfacies types of Abu Madi clastic reservoir in Faraskur Gas Field, onshore Nile Delta, Egypt
Abstract The sandstone of Abu Madi clastic reservoir constitutes the prime gas-producing reservoir in the Nile Delta region. So, the present research aims to delineate its microfacies and dominant diagenetic features and their effect on the petrophysical characteristics of the Abu Madi reservoir in...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2023-12-01
|
| Series: | Journal of Petroleum Exploration and Production Technology |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s13202-023-01727-x |
| _version_ | 1827328532786708480 |
|---|---|
| author | Emad A. Eysa Bassem S. Nabawy Ashraf Ghoneimi Ahmed H. Saleh |
| author_facet | Emad A. Eysa Bassem S. Nabawy Ashraf Ghoneimi Ahmed H. Saleh |
| author_sort | Emad A. Eysa |
| collection | DOAJ |
| description | Abstract The sandstone of Abu Madi clastic reservoir constitutes the prime gas-producing reservoir in the Nile Delta region. So, the present research aims to delineate its microfacies and dominant diagenetic features and their effect on the petrophysical characteristics of the Abu Madi reservoir in the Faraskur Gas Field. This could be achieved by integrating the petrographical studies and the conventional data to divide the reservoir into some reservoir rock types (RRTs) to delineate the impact of the mineral composition and diagenetic features on their reservoir quality and hydraulic flow zones. Petrographically, most samples are immature and described as angular to subrounded, poorly sorted, and slightly cemented. Five clastic microfacies types are recorded in the Abu Madi Formation: (1) quartz arenite, (2) feldspathic quartz arenite, (3) sub-feldspathic quartz arenite, (4) quartz wacke, and (5) sub-feldspathic quartz wacke. The most important post-depositional processes affecting the reservoir quality are the precipitation of pyrite and microsparite, as well as the feldspars alteration into authigenic dispersed clays represented by kaolinite and smectite/illite mixed layers. The dominant pore types are the primary intergranular, with some subsidiary fractures and dissolution pores. To check the reservoir quality of the Abu Madi clastics, the NPI (normalized porosity index), FZI (flow zone indicator), RQI (reservoir quality index), and λ k (permeability anisotropy) were estimated. Petrophysically, the studied samples are summed up into four RRTs, with the RRT4 group has the lowest ∅ and k values (av. ∅ = 16.2%, av. k H = 6.87 md) and the lowest reservoir quality parameters (av. FZI = 0.89 μm, av. DRT = 10.4, av. RQI = 0.18 μm, av. R 35 = 1.26 μm). On the contrary, the RRT1 group has the best petrophysical and reservoir parameters (av. ∅ = 25.9%, av. k H = 2695 md, av. DRT = 14.9, av. RQI = 3.12 μm, av. FZI = 8.85 μm, av. R 35 = 32.7 μm). The permeability anisotropy of the RRT2 and RRT3 is the highest in Faraskur Field (av. λ k = 2.4 and 2.62, respectively). This study is applicable to other extensions of the Abu Madi reservoirs in the Nile Delta basin to help in predicting their reservoir quality, petrophysical properties, and their hydrocarbon potentiality. |
| first_indexed | 2024-03-07T15:19:04Z |
| format | Article |
| id | doaj.art-7f185ae3a85049519618a1d91f9c1a3a |
| institution | Directory Open Access Journal |
| issn | 2190-0558 2190-0566 |
| language | English |
| last_indexed | 2024-03-07T15:19:04Z |
| publishDate | 2023-12-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of Petroleum Exploration and Production Technology |
| spelling | doaj.art-7f185ae3a85049519618a1d91f9c1a3a2024-03-05T17:45:44ZengSpringerOpenJournal of Petroleum Exploration and Production Technology2190-05582190-05662023-12-0114238140610.1007/s13202-023-01727-xPetrophysical rock typing based on the digenetic effect of the different microfacies types of Abu Madi clastic reservoir in Faraskur Gas Field, onshore Nile Delta, EgyptEmad A. Eysa0Bassem S. Nabawy1Ashraf Ghoneimi2Ahmed H. Saleh3Geology Department, Faculty of Science, Zagazig UniversityDepartment of Geophysical Sciences, National Research CenterGeology Department, Faculty of Science, Zagazig UniversityGeology Department, Faculty of Science, Zagazig UniversityAbstract The sandstone of Abu Madi clastic reservoir constitutes the prime gas-producing reservoir in the Nile Delta region. So, the present research aims to delineate its microfacies and dominant diagenetic features and their effect on the petrophysical characteristics of the Abu Madi reservoir in the Faraskur Gas Field. This could be achieved by integrating the petrographical studies and the conventional data to divide the reservoir into some reservoir rock types (RRTs) to delineate the impact of the mineral composition and diagenetic features on their reservoir quality and hydraulic flow zones. Petrographically, most samples are immature and described as angular to subrounded, poorly sorted, and slightly cemented. Five clastic microfacies types are recorded in the Abu Madi Formation: (1) quartz arenite, (2) feldspathic quartz arenite, (3) sub-feldspathic quartz arenite, (4) quartz wacke, and (5) sub-feldspathic quartz wacke. The most important post-depositional processes affecting the reservoir quality are the precipitation of pyrite and microsparite, as well as the feldspars alteration into authigenic dispersed clays represented by kaolinite and smectite/illite mixed layers. The dominant pore types are the primary intergranular, with some subsidiary fractures and dissolution pores. To check the reservoir quality of the Abu Madi clastics, the NPI (normalized porosity index), FZI (flow zone indicator), RQI (reservoir quality index), and λ k (permeability anisotropy) were estimated. Petrophysically, the studied samples are summed up into four RRTs, with the RRT4 group has the lowest ∅ and k values (av. ∅ = 16.2%, av. k H = 6.87 md) and the lowest reservoir quality parameters (av. FZI = 0.89 μm, av. DRT = 10.4, av. RQI = 0.18 μm, av. R 35 = 1.26 μm). On the contrary, the RRT1 group has the best petrophysical and reservoir parameters (av. ∅ = 25.9%, av. k H = 2695 md, av. DRT = 14.9, av. RQI = 3.12 μm, av. FZI = 8.85 μm, av. R 35 = 32.7 μm). The permeability anisotropy of the RRT2 and RRT3 is the highest in Faraskur Field (av. λ k = 2.4 and 2.62, respectively). This study is applicable to other extensions of the Abu Madi reservoirs in the Nile Delta basin to help in predicting their reservoir quality, petrophysical properties, and their hydrocarbon potentiality.https://doi.org/10.1007/s13202-023-01727-xFaraskurNile DeltaAbu MadiDiagenesisPetrophysicsReservoir quality |
| spellingShingle | Emad A. Eysa Bassem S. Nabawy Ashraf Ghoneimi Ahmed H. Saleh Petrophysical rock typing based on the digenetic effect of the different microfacies types of Abu Madi clastic reservoir in Faraskur Gas Field, onshore Nile Delta, Egypt Journal of Petroleum Exploration and Production Technology Faraskur Nile Delta Abu Madi Diagenesis Petrophysics Reservoir quality |
| title | Petrophysical rock typing based on the digenetic effect of the different microfacies types of Abu Madi clastic reservoir in Faraskur Gas Field, onshore Nile Delta, Egypt |
| title_full | Petrophysical rock typing based on the digenetic effect of the different microfacies types of Abu Madi clastic reservoir in Faraskur Gas Field, onshore Nile Delta, Egypt |
| title_fullStr | Petrophysical rock typing based on the digenetic effect of the different microfacies types of Abu Madi clastic reservoir in Faraskur Gas Field, onshore Nile Delta, Egypt |
| title_full_unstemmed | Petrophysical rock typing based on the digenetic effect of the different microfacies types of Abu Madi clastic reservoir in Faraskur Gas Field, onshore Nile Delta, Egypt |
| title_short | Petrophysical rock typing based on the digenetic effect of the different microfacies types of Abu Madi clastic reservoir in Faraskur Gas Field, onshore Nile Delta, Egypt |
| title_sort | petrophysical rock typing based on the digenetic effect of the different microfacies types of abu madi clastic reservoir in faraskur gas field onshore nile delta egypt |
| topic | Faraskur Nile Delta Abu Madi Diagenesis Petrophysics Reservoir quality |
| url | https://doi.org/10.1007/s13202-023-01727-x |
| work_keys_str_mv | AT emadaeysa petrophysicalrocktypingbasedonthedigeneticeffectofthedifferentmicrofaciestypesofabumadiclasticreservoirinfaraskurgasfieldonshoreniledeltaegypt AT bassemsnabawy petrophysicalrocktypingbasedonthedigeneticeffectofthedifferentmicrofaciestypesofabumadiclasticreservoirinfaraskurgasfieldonshoreniledeltaegypt AT ashrafghoneimi petrophysicalrocktypingbasedonthedigeneticeffectofthedifferentmicrofaciestypesofabumadiclasticreservoirinfaraskurgasfieldonshoreniledeltaegypt AT ahmedhsaleh petrophysicalrocktypingbasedonthedigeneticeffectofthedifferentmicrofaciestypesofabumadiclasticreservoirinfaraskurgasfieldonshoreniledeltaegypt |