Sedimentology and reservoir characterisation of Lower Jurassic clastic sedimentary rocks, Salt and Trans Indus Ranges, Pakistan: Evidence from petrography, scanning electron microscopy and petrophysics
Abstract In this study, sandstones of the Lower Jurassic Datta Formation in the Salt and Trans‐Indus ranges are investigated regarding composition, diagenesis, provenance and reservoir properties using petrography, scanning electron microscopy and petrophysical analysis. The detrital mineral composi...
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2025-04-01
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| Series: | The Depositional Record |
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| Online Access: | https://doi.org/10.1002/dep2.325 |
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| author | Salman Ahmed Khattak Nasar Khan Waseem Khan S. Sahaya Jude Dhas George Kontakiotis Ihtisham Islam Hammad Tariq Janjuhah Assimina Antonarakou |
| author_facet | Salman Ahmed Khattak Nasar Khan Waseem Khan S. Sahaya Jude Dhas George Kontakiotis Ihtisham Islam Hammad Tariq Janjuhah Assimina Antonarakou |
| author_sort | Salman Ahmed Khattak |
| collection | DOAJ |
| description | Abstract In this study, sandstones of the Lower Jurassic Datta Formation in the Salt and Trans‐Indus ranges are investigated regarding composition, diagenesis, provenance and reservoir properties using petrography, scanning electron microscopy and petrophysical analysis. The detrital mineral composition of the Datta Formation indicated that the sandstones are quartzose, lithic‐quartzose, lithic‐feldspatho‐quartzose, lithic‐quartzo‐feldspathic, quartzo‐lithic and feldspatho‐quartzose, primarily from the recycled orogen setting, including the Malani Igneous Suite, the Aravali Range and Nagar Parkar. The Datta Formation has sub‐angular to well‐rounded, fine to coarse and moderate to well‐sorted grains. Numerous diagnostic processes that occurred in the early to late stages of diagenesis, such as compaction, pressure solution, cementation, alteration, dolomitisation and dissolution, are supported by evidence in the Datta Formation. Dissolution, physical compaction, dolomitisation and alteration enhanced the reservoir quality, while pressure solution and cementation reduced the reservoir quality of the Datta Formation. The porosity types detected in the Datta Formation under scanning electron microscopy are vuggy, intracrystalline/intraparticle, dissolution and intercrystalline, with an average petrographic visual porosity of 11%. The petrophysical aspects of the Datta Formation in the Chonai‐01 well and the correlation between four wells indicated that the hydrocarbons had shifted up‐dip towards the Isa‐Khail‐01 well, so it is recommended for drilling because of the greater depositional thickness. The comparison of the Datta Formation with age‐equivalent units in other regions of eastern Tethys provided a better understanding of reservoir heterogeneities that can be applicable in areas with similar geological conditions for future petroleum exploration. |
| format | Article |
| id | doaj-art-9e95d55e8afe44d79ae8ba504097f7b0 |
| institution | DOAJ |
| issn | 2055-4877 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Depositional Record |
| spelling | doaj-art-9e95d55e8afe44d79ae8ba504097f7b02025-08-20T03:18:09ZengWileyThe Depositional Record2055-48772025-04-0111269871710.1002/dep2.325Sedimentology and reservoir characterisation of Lower Jurassic clastic sedimentary rocks, Salt and Trans Indus Ranges, Pakistan: Evidence from petrography, scanning electron microscopy and petrophysicsSalman Ahmed Khattak0Nasar Khan1Waseem Khan2S. Sahaya Jude Dhas3George Kontakiotis4Ihtisham Islam5Hammad Tariq Janjuhah6Assimina Antonarakou7State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry Chinese Academy of Sciences Guiyang ChinaDepartment of Geology University of Malakand Chakdara Khyber Pakhtunkhwa PakistanUniversity of Chinese Academy of Sciences Beijing ChinaSaveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences Saveetha University Chennai Tamil Nadu IndiaDepartment of Historical Geology‐Paleontology, Faculty of Geology and Geoenvironment, School of Earth Sciences National and Kapodistrian University of Athens Athens GreeceDepartment of Geology Shaheed Benazir Bhutto University Upper Dir, Sheringal PakistanINTI International University Nilai Negeri Sembilan MalaysiaDepartment of Historical Geology‐Paleontology, Faculty of Geology and Geoenvironment, School of Earth Sciences National and Kapodistrian University of Athens Athens GreeceAbstract In this study, sandstones of the Lower Jurassic Datta Formation in the Salt and Trans‐Indus ranges are investigated regarding composition, diagenesis, provenance and reservoir properties using petrography, scanning electron microscopy and petrophysical analysis. The detrital mineral composition of the Datta Formation indicated that the sandstones are quartzose, lithic‐quartzose, lithic‐feldspatho‐quartzose, lithic‐quartzo‐feldspathic, quartzo‐lithic and feldspatho‐quartzose, primarily from the recycled orogen setting, including the Malani Igneous Suite, the Aravali Range and Nagar Parkar. The Datta Formation has sub‐angular to well‐rounded, fine to coarse and moderate to well‐sorted grains. Numerous diagnostic processes that occurred in the early to late stages of diagenesis, such as compaction, pressure solution, cementation, alteration, dolomitisation and dissolution, are supported by evidence in the Datta Formation. Dissolution, physical compaction, dolomitisation and alteration enhanced the reservoir quality, while pressure solution and cementation reduced the reservoir quality of the Datta Formation. The porosity types detected in the Datta Formation under scanning electron microscopy are vuggy, intracrystalline/intraparticle, dissolution and intercrystalline, with an average petrographic visual porosity of 11%. The petrophysical aspects of the Datta Formation in the Chonai‐01 well and the correlation between four wells indicated that the hydrocarbons had shifted up‐dip towards the Isa‐Khail‐01 well, so it is recommended for drilling because of the greater depositional thickness. The comparison of the Datta Formation with age‐equivalent units in other regions of eastern Tethys provided a better understanding of reservoir heterogeneities that can be applicable in areas with similar geological conditions for future petroleum exploration.https://doi.org/10.1002/dep2.325diagenesispetrophysicsprovenancereservoir characteristicssandstone |
| spellingShingle | Salman Ahmed Khattak Nasar Khan Waseem Khan S. Sahaya Jude Dhas George Kontakiotis Ihtisham Islam Hammad Tariq Janjuhah Assimina Antonarakou Sedimentology and reservoir characterisation of Lower Jurassic clastic sedimentary rocks, Salt and Trans Indus Ranges, Pakistan: Evidence from petrography, scanning electron microscopy and petrophysics The Depositional Record diagenesis petrophysics provenance reservoir characteristics sandstone |
| title | Sedimentology and reservoir characterisation of Lower Jurassic clastic sedimentary rocks, Salt and Trans Indus Ranges, Pakistan: Evidence from petrography, scanning electron microscopy and petrophysics |
| title_full | Sedimentology and reservoir characterisation of Lower Jurassic clastic sedimentary rocks, Salt and Trans Indus Ranges, Pakistan: Evidence from petrography, scanning electron microscopy and petrophysics |
| title_fullStr | Sedimentology and reservoir characterisation of Lower Jurassic clastic sedimentary rocks, Salt and Trans Indus Ranges, Pakistan: Evidence from petrography, scanning electron microscopy and petrophysics |
| title_full_unstemmed | Sedimentology and reservoir characterisation of Lower Jurassic clastic sedimentary rocks, Salt and Trans Indus Ranges, Pakistan: Evidence from petrography, scanning electron microscopy and petrophysics |
| title_short | Sedimentology and reservoir characterisation of Lower Jurassic clastic sedimentary rocks, Salt and Trans Indus Ranges, Pakistan: Evidence from petrography, scanning electron microscopy and petrophysics |
| title_sort | sedimentology and reservoir characterisation of lower jurassic clastic sedimentary rocks salt and trans indus ranges pakistan evidence from petrography scanning electron microscopy and petrophysics |
| topic | diagenesis petrophysics provenance reservoir characteristics sandstone |
| url | https://doi.org/10.1002/dep2.325 |
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