Petrophysical Evaluation and Reservoir Characterization of the Lower Jurassic Mus Formation Using Wireline Logs: A case study from the Harir Oil Field, Kurdistan Region, Iraq

Petrophysical Evaluation and Reservoir Characterization of the Lower Jurassic Mus Formation Using Wireline Logs: A case study from the Harir Oil Field, Kurdistan Region, 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 Evaluation and Reservoir Characterization of the Lower Jurassic Mus Formation Using Wireline Logs: A case study from the Harir Oil Field, Kurdistan Region, Iraq Mahdi Khairi Aswad, Nabaz Jawhar Qadr This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9193419/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 9 You are reading this latest preprint version Abstract The Lower Jurassic Mus Formation is a significant hydrocarbon reservoir in northern Iraq. The interpretations of the petrophysical property using wireline logs play an important role in the reservoir characterization, providing key insights into lithology, shale volume, porosity, permeability, flow zone indicator, as well as water and hydrocarbon saturations. In this study, Petrophysical techniques were applied to evaluate the Mus Formation in the Harir oil field, Kurdistan region of Iraq. The analysis was wireline log data from Well JSK-1, using a suite of logs that consisted of Gamma Ray, Caliper, Density, Neutron, and Resistivity Logs to evaluate the petrophysical properties of the Mus Formation. The Mus Formation was determined from the subsurface with a total thickness of about 40m. The main lithologies include limestone, dolomitic limestone, dolomite, and minor sandstone fragments with minimal shale content. The average porosity within the pay zone was 10%, with a permeability of 400mD. The water and hydrocarbon saturation in the pay zone was 70% and 30% respectively. The total thickness of the reservoir rock was 40m, with a pay zone thickness of 2.1m. The findings indicate that the upper part of the Mus Formation shows a good reservoir quality, as evidenced by the presence of the pay zone and resistivity value of the formation. These results suggest that the Mus Formation contains an active hydrocarbon-bearing interval and the potential to contribute to the future hydrocarbon exploration and production in different oil fields of northern Iraq. Reservoir Characterization Petrophysical Properties Mus Formation Hariri Oil Filed Northern Iraq Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Revision requested 24 Apr, 2026 Reviews received at journal 24 Apr, 2026 Reviewers agreed at journal 07 Apr, 2026 Reviews received at journal 05 Apr, 2026 Reviewers agreed at journal 02 Apr, 2026 Reviewers invited by journal 01 Apr, 2026 Editor assigned by journal 01 Apr, 2026 Submission checks completed at journal 23 Mar, 2026 First submitted to journal 22 Mar, 2026 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. 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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-9193419","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":617727885,"identity":"fbbdc751-0356-4c16-ae97-0e1d20ecca22","order_by":0,"name":"Mahdi Khairi Aswad","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA20lEQVRIiWNgGAWjYFACHgaJBAjL8AGQYGxgYAMJEqfF2IB4LVCWmQRRWnTbzx688YDBzt7g+OFtlT/bGGQ3HGBL+/AGjxazM3nJFgkMyYkbzqSV3eZtYzAGajk8cw4+LQdyzIB+YU4AMW4ztjEkbjjA3syMz2Fm59+AtNTbgxiFP4nScgNsy2HGbUAGAy9YC9thAlreGFskGBxP3H/jWbE0zzkJ45mH2ZIZ8frlfI7hzR8V1faS/ckbP/4os5HtO95mzIAvxCDAAM4CRg0zQeWjYBSMglEwCggBAMmtTQw6ye5GAAAAAElFTkSuQmCC","orcid":"","institution":"Salahaddin University-Erbil","correspondingAuthor":true,"prefix":"","firstName":"Mahdi","middleName":"Khairi","lastName":"Aswad","suffix":""},{"id":617727887,"identity":"b1fefe03-447d-4280-b9a4-91e6a465e541","order_by":1,"name":"Nabaz Jawhar Qadr","email":"","orcid":"","institution":"Salahaddin University - Erbil","correspondingAuthor":false,"prefix":"","firstName":"Nabaz","middleName":"Jawhar","lastName":"Qadr","suffix":""}],"badges":[],"createdAt":"2026-03-22 19:39:00","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-9193419/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-9193419/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":106403759,"identity":"a45e1c2b-5864-4f7c-a3ab-292eb00a2e3e","added_by":"auto","created_at":"2026-04-08 09:14:55","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":902005,"visible":true,"origin":"","legend":"","description":"","filename":"Manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-9193419/v1_covered_c18c0d84-caa3-4dfd-b299-04ee3bef5242.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Petrophysical Evaluation and Reservoir Characterization of the Lower Jurassic Mus Formation Using Wireline Logs: A case study from the Harir Oil Field, Kurdistan Region, Iraq","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"carbonates-and-evaporites","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"caev","sideBox":"Learn more about [Carbonates and Evaporites](http://link.springer.com/journal/13146)","snPcode":"13146","submissionUrl":"https://submission.nature.com/new-submission/13146/3","title":"Carbonates and Evaporites","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"Reservoir Characterization, Petrophysical Properties, Mus Formation, Hariri Oil Filed, Northern Iraq","lastPublishedDoi":"10.21203/rs.3.rs-9193419/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-9193419/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThe Lower Jurassic Mus Formation is a significant hydrocarbon reservoir in northern Iraq. 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