Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    The development of a new sonic correlation for UCS estimation from drilling data

    Access Status
    Fulltext not available
    Authors
    Mostofi, Masood
    Rahimzadeh, H.
    Shahbazi, K.
    Date
    2011
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Mostofi, M. and Rahimzadeh, H. and Shahbazi, K. 2011. The development of a new sonic correlation for UCS estimation from drilling data. Petroleum Science and Technology. 29 (7): pp. 728-734.
    Source Title
    Petroleum Science and Technology
    DOI
    10.1080/10916460903452025
    ISSN
    1091-6466
    School
    Department of Petroleum Engineering
    URI
    http://hdl.handle.net/20.500.11937/42250
    Collection
    • Curtin Research Publications
    Abstract

    One of the most important characteristics of rocks in drilling operations is unconfined rock strength (UCS), which is critical in different aspects of drilling operations. Several laboratory-based correlations have been generated for specific rocks to estimate UCS from physical properties (such as transient time, porosity, and Young's modulus) of the rocks. In drilling analysis, when UCS information is required and direct methods for estimation of UCS are not available, it is common to use correlations that have been developed for other formations with the same or similar lithology. Obviously, the results of estimations based on UCS correlations for other formations will not be accurate and can affect subsequent analyses. Therefore, it is highly recommended to generate a correlation for the formation of interest, though it is not always possible to reach this goal from experimental works on core samples retrieved from the formation. In this study, a sonic correlation that shows that it can provide relatively better global estimation of UCS for limestone rocks is modified for one of the Iranian carbonate formations by determining new coefficients for the correlation based on drilling data. For this purpose, the drilling information recorded in mud logging data is analyzed to backward simulate the drilling process based on a modified penetration rate model and calculate the rock strengths of the formation. The apparent rock strength log generated from this calculation proceeds quality-controlled steps according to statistical and pattern recognition methods to eliminate the noises and fluctuations that normally exist while working with field data. Then, a new correlation is developed from the formation response to sonic logs and apparent rock strength log. Because this new correlation is originally generated for the formation of interest, UCS is estimated more accurately and analyses dependent on UCS show fewer errors. Copyright © Taylor & Francis Group, LLC.

    Related items

    Showing items related by title, author, creator and subject.

    • Thermal History and Deep Overpressure Modelling in the Northern Carnarvon Basin, North West Shelf, Australia
      He, Sheng (2002)
      The Northern Carnarvon Basin is the richest petroleum province in Australia. About 50 gas/condensate and oil fields, associated mainly with Jurassic source rocks, have been discovered in the sub-basins and on the Rankin ...
    • A log based analysis to estimate mechanical properties and in-situ stresses in a shale gas well in North Perth Basin
      Archer, S.; Rasouli, Vamegh (2012)
      In drilling operation the design of a proper mud weight to avoid any instability’s is important. A low mud weight may cause breakouts around the borehole whereas a high mud weight can fracture the formation. Mud weight ...
    • A rock mechanical model developed for a Coal Seam Well
      Minaeian, V.; Rasouli, Vamegh (2011)
      Drilling operation in order to produce from Coalbed methane (CBM) is prone to various geomechanics related problems not only within the coal seam but also across the overburden layers. Wellbore instability in the form of ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.