Petrophysical Analysis and Reservoir Characterization of the Miocene Jeribe, Dhiban, and Euphrates Formations in a selected well in Jambour Oilfield, Kirkuk Area, NE Iraq

Petrophysical Analysis and Reservoir Characterization of the Miocene Jeribe, Dhiban, and Euphrates Formations in a selected well in Jambour Oilfield, Kirkuk Area, NE Iraq | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Petrophysical Analysis and Reservoir Characterization of the Miocene Jeribe, Dhiban, and Euphrates Formations in a selected well in Jambour Oilfield, Kirkuk Area, NE Iraq Muhamad B. M. Saeed, Dler H. Baban This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6523616/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 26 Sep, 2025 Read the published version in Carbonates and Evaporites → Version 1 posted 11 You are reading this latest preprint version Abstract The Miocene Jeribe, Dhiban, and Euphrates formations are considered attractive reservoir package in the petroleum exploration processes in Iraq. In this study, this package has been investigated from reservoir characterization point of view from a selected well (Ja-46) in the Jambour Oilfield in northern Iraq. The analysis of the wireline log data revealed that the Dhiban and Euphrates formations are clean with less than 10% shale content, while zones with relatively higher percentages of shale content observed in the middle part of the Jeribe Formation. Dispersed type of distribution was the common feature of the shale in the Jeribe and Dhiban Formation with additionally laminar type in the Euphrates Formation. The Jeribe Formation has porosities ranging from less than 10% to over 20%. The upper part of the Dhiban Formation has two different zones with porosities between 15% and 30%, while the majority of the Euphrates Formation has porosities greater than 20%. The permeability in the Jeribe Formation generally ranges from 2 mD to 40 mD and the Dhiban Formation of negligible permeability except for two intervals at its upper part which showed permeabilities exceeding 70 mD. Most parts of the Euphrates Formation have good permeability, occasionally reaching 170 mD. More than 97% of the reservoir units RU-J1, RU-J2, and RU-J4 in the Jeribe Formation are payable, whereas the reservoir unit RU-J3 only displays approximately 56% of the unit as payable. Just 7% of the reservoir unit RU-D2 of the Dhiban Formation is payable, compared to roughly 47% of the RU-D1 reservoir unit in the upper part of the formation. The 8 m gross thickness of the reservoir unit RU-E2 at the center of the Euphrates Formation is completely payable, while at least 94% of the gross thicknesses of the other three reservoir units of the formation have been found payable. Approximately 29% of the Jeribe Formation, 8% of the Dhiban Formation, and 80% of the Euphrates Formation are productive when using the 0.6 movable hydrocarbon index cutoff. Jeribe Formation Dhiban Formation Euphrates Formation Jambour Oilfield reservoir characterization movable hydrocarbons Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 26 Sep, 2025 Read the published version in Carbonates and Evaporites → Version 1 posted Editorial decision: Revision requested 29 May, 2025 Reviews received at journal 26 May, 2025 Reviews received at journal 24 May, 2025 Reviews received at journal 22 May, 2025 Reviewers agreed at journal 13 May, 2025 Reviewers agreed at journal 10 May, 2025 Reviewers agreed at journal 07 May, 2025 Reviewers invited by journal 05 May, 2025 Editor assigned by journal 05 May, 2025 Submission checks completed at journal 25 Apr, 2025 First submitted to journal 24 Apr, 2025 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-6523616","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":453151473,"identity":"94a6519d-f50c-4260-b67d-8e0680c4eb96","order_by":0,"name":"Muhamad B. M. 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In this study, this package has been investigated from reservoir characterization point of view from a selected well (Ja-46) in the Jambour Oilfield in northern Iraq. The analysis of the wireline log data revealed that the Dhiban and Euphrates formations are clean with less than 10% shale content, while zones with relatively higher percentages of shale content observed in the middle part of the Jeribe Formation. Dispersed type of distribution was the common feature of the shale in the Jeribe and Dhiban Formation with additionally laminar type in the Euphrates Formation. The Jeribe Formation has porosities ranging from less than 10% to over 20%. The upper part of the Dhiban Formation has two different zones with porosities between 15% and 30%, while the majority of the Euphrates Formation has porosities greater than 20%. The permeability in the Jeribe Formation generally ranges from 2 mD to 40 mD and the Dhiban Formation of negligible permeability except for two intervals at its upper part which showed permeabilities exceeding 70 mD. Most parts of the Euphrates Formation have good permeability, occasionally reaching 170 mD. More than 97% of the reservoir units RU-J1, RU-J2, and RU-J4 in the Jeribe Formation are payable, whereas the reservoir unit RU-J3 only displays approximately 56% of the unit as payable. Just 7% of the reservoir unit RU-D2 of the Dhiban Formation is payable, compared to roughly 47% of the RU-D1 reservoir unit in the upper part of the formation. The 8 m gross thickness of the reservoir unit RU-E2 at the center of the Euphrates Formation is completely payable, while at least 94% of the gross thicknesses of the other three reservoir units of the formation have been found payable. 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