Identifying and evaluating the hydrocarbon-bearing zones within the Cretaceous reservoirs using well logging data in El-Fayoum Concessions, Egypt

Identifying and evaluating the hydrocarbon-bearing zones within the Cretaceous reservoirs using well logging data in El-Fayoum Concessions, Egypt | 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 Identifying and evaluating the hydrocarbon-bearing zones within the Cretaceous reservoirs using well logging data in El-Fayoum Concessions, Egypt Mohamed Osman Ebraheem, Hamza Ibrahim, Ahmed Hosny Senosy This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5865620/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 6 You are reading this latest preprint version Abstract The goal of the study is to find effective pay reservoir zones through petrophysical analysis and formation evaluation of the Cretaceous reservoirs in El-Fayoum Concessions. This is done by analyzing the petrophysical properties of these reservoirs. These properties are used with cross-plots and cut-off techniques to ascertain the distribution of lithologies and pay zones. The interpretation of well logs revealed that the field includes four lithologies: interbedded sand, limestone, shale, and siltstone. Additionally, they demonstrate that the upper Bahariya Formation, Abu Roash F, and G members contain seven possible hydrocarbon-bearing zones. The F member and upper Bahariya are argillaceous limestone, whereas the Abu Roash G member is shaly sandstone laminated to scattered shale. There is a substantial shale bed beneath and above these reservoir zones, which serves as a possible source and/or seal rock. The potential petroleum system of the area is influenced by the thick stratigraphic succession, the time of trap formation, and the highly porous and permeable zones. Due to lower shale volume (13%-29%), higher effective porosity (5%-10%), and lower water saturation (27%-67%), the carbonate of Abu Roash F member, along with the lower sandstone of Abu Roash G and upper Bahariya, is considered the most promising zone for oil prospecting due to its high net pay thickness. Also, the iso-parametric maps show that the Abu Roash F member at the Silah-1X drilled well in the northwest direction has higher effective porosity, lower water saturation, and shale volume content. This indicates that the western and southwestern parts are best suited for exploration and drilling operations. petrophysical parameters cross-plots cut-off Gindi basin Silah field Egypt Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Editor assigned by journal 28 Apr, 2025 Reviews received at journal 18 Apr, 2025 Reviewers agreed at journal 14 Apr, 2025 Reviewers invited by journal 14 Apr, 2025 Submission checks completed at journal 12 Apr, 2025 First submitted to journal 11 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-5865620","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":442533865,"identity":"db3a377a-6cd8-4681-b4ab-5f2fdc3479a9","order_by":0,"name":"Mohamed Osman Ebraheem","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAABDUlEQVRIiWNgGAWjYDACCQYGZgiL+QADgwFUlIc4LWwJJGvhMUCI4tPCL9378HNBhU00g9iZzx9+FDDkGdxIYHzwto1BTt4BuxbJOceNpWecScttkM7dJtljwFAM1MJsOLeNwdjwAHYtBjfSGKR52w6DtTAD/ZI4c0YCG1CEIXFjA3Yt9jfSmH/z/vsP1JLz+DNUC/tvoJZ6XFoMJNKAZjYcAGlhkAZp6ZdIYGMGakmQx+F9iTvH2Kx5jiXntkmnmQH9IpHYz/OwWXLOOQnDDbhCbHYb822eGrvcfunkxx9+/LFJbGNPPvjhTZmNvDwOh8EBG9RWIGZsADMMDhDQggkI2jIKRsEoGAUjBQAA7P5RpE+QCm4AAAAASUVORK5CYII=","orcid":"","institution":"New Valley University","correspondingAuthor":true,"prefix":"","firstName":"Mohamed","middleName":"Osman","lastName":"Ebraheem","suffix":""},{"id":442533866,"identity":"e1c7d0c8-23fc-4844-9d2b-87840191cbea","order_by":1,"name":"Hamza Ibrahim","email":"","orcid":"","institution":"Assiut University","correspondingAuthor":false,"prefix":"","firstName":"Hamza","middleName":"","lastName":"Ibrahim","suffix":""},{"id":442533867,"identity":"6da0ea0a-ea8e-4867-b472-6cfaca078c66","order_by":2,"name":"Ahmed Hosny Senosy","email":"","orcid":"","institution":"New Valley University","correspondingAuthor":false,"prefix":"","firstName":"Ahmed","middleName":"Hosny","lastName":"Senosy","suffix":""}],"badges":[],"createdAt":"2025-01-20 11:53:18","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-5865620/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-5865620/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":80652243,"identity":"979c822e-8d1e-4da8-a56b-4e2f4ef01928","added_by":"auto","created_at":"2025-04-15 15:03:47","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":3139516,"visible":true,"origin":"","legend":"","description":"","filename":"manuscriptwithouttrackedchanges.pdf","url":"https://assets-eu.researchsquare.com/files/rs-5865620/v1_covered_58ea1305-5468-4e65-9d20-84bad19efc35.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Identifying and evaluating the hydrocarbon-bearing zones within the Cretaceous reservoirs using well logging data in El-Fayoum Concessions, Egypt ","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":"discover-applied-sciences","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"","sideBox":"Learn more about [Discover Applied Sciences](https://link.springer.com/journal/42452)","snPcode":"42452","submissionUrl":"https://submission.springernature.com/new-submission/42452/3","title":"Discover Applied Sciences","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"stoa","reportingPortfolio":"Discover Series","inReviewEnabled":true,"inReviewRevisionsEnabled":true},"keywords":"petrophysical parameters, cross-plots, cut-off, Gindi basin, Silah field, Egypt","lastPublishedDoi":"10.21203/rs.3.rs-5865620/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-5865620/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThe goal of the study is to find effective pay reservoir zones through petrophysical analysis and formation evaluation of the Cretaceous reservoirs in El-Fayoum Concessions. 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