Facies architecture and sequence stratigraphy of Kungurian Amb Formation, western Salt Range, Pakistan
The Amb Formation of the Permian age is exposed in the Salt Range in the upper Indus basin of Pakistan. This rock unit is mainly composed of sandstone and shale in which three facies (named AF1, AF2, AF3) and five microfacies were distinguished based on field and petrographic study, respectively. Po...
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Elsevier
2024-01-01
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| Series: | Kuwait Journal of Science |
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| Online Access: | https://www.sciencedirect.com/science/article/pii/S2307410823002109 |
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| author | Khawaja Umair Majeed Syed Kamran Ali Syed Umair Ali Muhammad Haris Raja Qauid Ahmad Basit Ali Khan Atif Jamil Nusrat Nazir |
| author_facet | Khawaja Umair Majeed Syed Kamran Ali Syed Umair Ali Muhammad Haris Raja Qauid Ahmad Basit Ali Khan Atif Jamil Nusrat Nazir |
| author_sort | Khawaja Umair Majeed |
| collection | DOAJ |
| description | The Amb Formation of the Permian age is exposed in the Salt Range in the upper Indus basin of Pakistan. This rock unit is mainly composed of sandstone and shale in which three facies (named AF1, AF2, AF3) and five microfacies were distinguished based on field and petrographic study, respectively. Porosity and permeability have changed and exhibit various diagenetic processes. Sequence stratigraphy identifies the zones of all upward concaving cycles and HST. The petrophysical study indicates good reservoir characteristics for the Amb Formation and this can act as reservoir rock in the petroleum system. Fossil assemblages, including Fusulina spp., identified during petrographic analysis indicate an Early Permian age of the Amb Formation in the study area. The multidisciplinary study carried out in the study area allowed us to reconstruct the depositional model for the Amb Formation which occurred in the middle to inner shelf and in a shallow marine environment. Interpretation of well logs of the Dhermund well show good reservoir properties of the Amb Formation including total porosity (13%), effective porosity (9.04%), volume of shale (14.54%), water saturation (34%), hydrocarbon saturation (65%), permeability (121.92 mD), total thickness of the formation (107 m) and net reservoir thickness (13.12m). This research approach of combined field and laboratory stratigraphy and biostratigraphy would be applied in other areas of exposure of the Amb Formation to unravel the age and depositional environment of this formation. |
| format | Article |
| id | doaj-art-7de2bb2543b947e9a2c84e63a83a31b5 |
| institution | Kabale University |
| issn | 2307-4116 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Kuwait Journal of Science |
| spelling | doaj-art-7de2bb2543b947e9a2c84e63a83a31b52025-08-20T03:26:35ZengElsevierKuwait Journal of Science2307-41162024-01-01511100167https://doi.org/10.1016/j.kjs.2023.12.006Facies architecture and sequence stratigraphy of Kungurian Amb Formation, western Salt Range, PakistanKhawaja Umair Majeed0Syed Kamran Ali1Syed Umair Ali2Muhammad Haris3Raja Qauid Ahmad4Basit Ali Khan5Atif Jamil6Nusrat Nazir7Institute of Geology, University of Azad Jammu and Kashmir, Muzaffarabad, PakistanInstitute of Geology, University of Azad Jammu and Kashmir, Muzaffarabad, PakistanInstitute of Geology, University of Azad Jammu and Kashmir, Muzaffarabad, PakistanInstitute of Geology, University of Azad Jammu and Kashmir, Muzaffarabad, PakistanInstitute of Geology, University of Azad Jammu and Kashmir, Muzaffarabad, PakistanInstitute of Geology, University of Azad Jammu and Kashmir, Muzaffarabad, PakistanInstitute of Geology, University of Azad Jammu and Kashmir, Muzaffarabad, PakistanSchool of Earth Sciences & Key Laboratory of Mineral Resources in Western China, Lanzhou University, ChinaThe Amb Formation of the Permian age is exposed in the Salt Range in the upper Indus basin of Pakistan. This rock unit is mainly composed of sandstone and shale in which three facies (named AF1, AF2, AF3) and five microfacies were distinguished based on field and petrographic study, respectively. Porosity and permeability have changed and exhibit various diagenetic processes. Sequence stratigraphy identifies the zones of all upward concaving cycles and HST. The petrophysical study indicates good reservoir characteristics for the Amb Formation and this can act as reservoir rock in the petroleum system. Fossil assemblages, including Fusulina spp., identified during petrographic analysis indicate an Early Permian age of the Amb Formation in the study area. The multidisciplinary study carried out in the study area allowed us to reconstruct the depositional model for the Amb Formation which occurred in the middle to inner shelf and in a shallow marine environment. Interpretation of well logs of the Dhermund well show good reservoir properties of the Amb Formation including total porosity (13%), effective porosity (9.04%), volume of shale (14.54%), water saturation (34%), hydrocarbon saturation (65%), permeability (121.92 mD), total thickness of the formation (107 m) and net reservoir thickness (13.12m). This research approach of combined field and laboratory stratigraphy and biostratigraphy would be applied in other areas of exposure of the Amb Formation to unravel the age and depositional environment of this formation.https://www.sciencedirect.com/science/article/pii/S2307410823002109sequence stratigraphyfusulinakungurianparafusulinaverbeekina |
| spellingShingle | Khawaja Umair Majeed Syed Kamran Ali Syed Umair Ali Muhammad Haris Raja Qauid Ahmad Basit Ali Khan Atif Jamil Nusrat Nazir Facies architecture and sequence stratigraphy of Kungurian Amb Formation, western Salt Range, Pakistan Kuwait Journal of Science sequence stratigraphy fusulina kungurian parafusulina verbeekina |
| title | Facies architecture and sequence stratigraphy of Kungurian Amb Formation, western Salt Range, Pakistan |
| title_full | Facies architecture and sequence stratigraphy of Kungurian Amb Formation, western Salt Range, Pakistan |
| title_fullStr | Facies architecture and sequence stratigraphy of Kungurian Amb Formation, western Salt Range, Pakistan |
| title_full_unstemmed | Facies architecture and sequence stratigraphy of Kungurian Amb Formation, western Salt Range, Pakistan |
| title_short | Facies architecture and sequence stratigraphy of Kungurian Amb Formation, western Salt Range, Pakistan |
| title_sort | facies architecture and sequence stratigraphy of kungurian amb formation western salt range pakistan |
| topic | sequence stratigraphy fusulina kungurian parafusulina verbeekina |
| url | https://www.sciencedirect.com/science/article/pii/S2307410823002109 |
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