• Login
    View Item 
    •   Home
    • Theses & Dissertations
    • 2016 - Mines Theses & Dissertations
    • View Item
    •   Home
    • Theses & Dissertations
    • 2016 - Mines Theses & Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of Mines RepositoryCommunitiesPublication DateAuthorsTitlesSubjectsThis CollectionPublication DateAuthorsTitlesSubjects

    My Account

    Login

    Mines Links

    Arthur Lakes LibraryColorado School of Mines

    Statistics

    Display Statistics

    Petrophysical rock typing of unconventional shale plays: a case study for the Niobrara Formation of the Denver-Julesburg (DJ) Basin

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Kamruzzaman_mines_0052N_10965.pdf
    Size:
    56.89Mb
    Format:
    PDF
    Download
    Author
    Kamruzzaman, Asm
    Advisor
    Prasad, Manika
    Date issued
    2016
    Keywords
    mudrocks
    Niobrara Formation
    petrophysics
    rock physics
    rock typing
    unconventional shale
    
    Metadata
    Show full item record
    URI
    https://hdl.handle.net/11124/170082
    Abstract
    A petrophysical rock typing has been performed based on a methodology that integrated depositional and petrophysical rock analysis to identify distinct rock types in the Niobrara Formation of the Denver-Julesburg (DJ) Basin. The depositional rock analysis incorporated a literature study, interpretations of the geologic depositional setting and sequence stratigraphy, core descriptions, and analysis of well-log data. The petrophysical rock analysis was carried out using experimental core data on mineralogy, pore characterization, source rock evaluation, micro-textural image analysis, and ultrasonic acoustic velocity and anisotropy interpretations. Six Niobrara Formation lithofacies and three similar lithofacies-groups (All Marls, Middle Chalks, and Basal Chalk) were identied in the target well interval through the depositional rock analysis within the context of the large-scale geologic framework. The pore-scale petrophysical rock analysis was carried out to investigate whether these lithofacies-groups followed distinct rock types in the Niobrara Formation based on the analysis of experimental core data. The conclusions reached in this study included that, based on the mineralogy, pore structure, and acoustic velocity interpretations, the Basal "Chalk" may be a Basal Marl - at least locally in the studied target well. However, the Basal Chalk rocks contain lowest source rock potential and are not likely to contribute to economic hydrocarbon production for the target well. Both the All Marls and the Basal Chalk rock-groups have higher porosity, smaller pores, and smaller pore throats than the Middle Chalks. The rocks in the Middle Chalks have higher stiffness and pressure compliant pores. The Niobrara Formation is an unconventional petroleum system - its hydrocarbon-rich mudrock units were deposited in a shallow marine environment and have evolved as oil- and gas-prone source and reservoir rocks. Significant pore-scale variability in mineralogy, pore characterization, organic matter distribution, and acoustic velocity and anisotropy properties exist in these rocks. Hydrocarbon production from its low-porosity, nanodarcy permeability, and interbedded chalk-marl reservoir interval is very challenging. The petrophysical rock typing methodology adopted in this case study can be a useful formation evaluation tool for the Niobrara Formation. It can provide valuable information about its rock matrix, such as, the lithofacies identification and descriptions through depositional rock analysis, identifying reservoir and sourcing intervals, mineralogy analysis, organic matter evaluation, pore characterization, and acoustic velocity and anisotropy properties.
    Rights
    Copyright of the original work is retained by the author.
    Collections
    2016 - Mines Theses & Dissertations

    entitlement

     
    DSpace software (copyright © 2002 - 2022)  DuraSpace
    Quick Guide | Contact Us
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.