Farouk, S., Qteishat, A., Sen, S. orcid.org/0000-0002-2796-4737 et al. (4 more authors) (2025) Characterization of the Gas-Bearing Tight Paleozoic Sandstone Reservoirs of the Risha Field, Jordan: Inferences on Reservoir Quality and Productivity. Arabian Journal for Science and Engineering, 50. pp. 215-235. ISSN 2193-567X
Abstract
This study presents the petrographical and petrophysical characteristics of the Cambro-Ordovician clastic reservoirs from the Risha field, northeastern Jordan. Routine core analysis, wireline logs, petrographic thin sections, scanning electron microscopy, and X-ray diffraction were integrated to characterize the gas reservoirs of the Risha, Dubeidib, and Umm Sahm formations (the equivalent of Sarah, Qasim, and Upper Saq formations of northern Saudi Arabia). These reservoirs are variably micro- and mesoporous, with permeability < 1 mD and dominantly < 6% porosity. Wireline log-based assessment exhibits low shale volume (< 30%) and high hydrocarbon saturation (45–95%) in these tight reservoirs. Petrographic investigation reveals that these reservoirs are fine-grained sandstones, moderately sorted with high mineralogical maturity. The Risha and Dubeidib reservoirs are subarkose, while the Umm Sahm reservoir is composed of quartz arenite. The late diagenetic silica cementation is inferred as reservoir quality-reducing diagenetic factor, with quartz overgrowth of > 10% corresponding to < 4% porosity. SEM images exhibit the presence of grain-coating, pore-filling, and pore-lining chlorite, and illite phases which hinder quartz overgrowth and had a positive effect in retaining the primary porosity. The sandstones with > 20% clay-coating coverage corresponds to a lower quartz overgrowth (< 5%) and therefore higher intergranular porosity (> 5%). Locally sutured grain contacts and stylolites are observed which indicate intense chemical compaction. The feldspar grains are observed to be partially dissolved, which generated minor secondary porosity. Micropore-dominated pore systems and rare secondary macroporosity are typically isolated by abundant cement and/or pore throats choked by clay minerals.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © King Fahd University of Petroleum & Minerals 2024. This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use (https://www.springernature.com/gp/open-research/policies/accepted-manuscript-terms), but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1007/s13369-024-09000-x. |
Keywords: | Petrography; Diagenesis; Petrophysics; Tight sand; Risha field; Paleozoic tight reservoir |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Institute for Applied Geosciences (IAG) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 29 Apr 2024 14:18 |
Last Modified: | 18 Feb 2025 14:26 |
Status: | Published |
Publisher: | Springer |
Identification Number: | 10.1007/s13369-024-09000-x |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:212029 |
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Filename: Farouk et al Accepted ms.pdf
