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    Semi-automated porosity identification from thin section images using image analysis and intelligent discriminant classifiers

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    Fulltext not available
    Authors
    Ghiasi-Freez, J.
    Soleimanpour, I.
    Kadkhodaie, Ali
    Ziaii, M.
    Sedighi, M.
    Hatampour, M.
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Ghiasi-Freez, J. and Soleimanpour, I. and Kadkhodaie-IIlkhchi, A. and Ziaii, M. and Sedighi, M. and Hatampour, M. 2015. Semi-automated porosity identification from thin section images using image analysis and intelligent discriminant classifiers. Computers & Geosciences. 45: pp. 36-45.
    Source Title
    Computers & Geosciences
    DOI
    10.1016/j.cageo.2012.03.006
    School
    Department of Petroleum Engineering
    URI
    http://hdl.handle.net/20.500.11937/6705
    Collection
    • Curtin Research Publications
    Abstract

    Identification of different types of porosity within a reservoir rock is a functional parameter for reservoir characterization since various pore types play different roles in fluid transport and also, the pore spaces determine the fluid storage capacity of the reservoir. The present paper introduces a model for semi-automatic identification of porosity types within thin section images. To get this goal, a pattern recognition algorithm is followed. Firstly, six geometrical shape parameters of sixteen largest pores of each image are extracted using image analysis techniques. The extracted parameters and their corresponding pore types of 294 pores are used for training two intelligent discriminant classifiers, namely linear and quadratic discriminant analysis. The trained classifiers take the geometrical features of the pores to identify the type and percentage of five types of porosity, including interparticle, intraparticle, oomoldic, biomoldic, and vuggy in each image. The accuracy of classifiers is determined from two standpoints. Firstly, the predicted and measured percentages of each type of porosity are compared with each other. The results indicate reliable performance for predicting percentage of each type of porosity. In the second step, the precisions of classifiers for categorizing the pore spaces are analyzed. The classifiers also took a high acceptance score when used for individual recognition of pore spaces. The proposed methodology is a further promising application for petroleum geologists allowing statistical study of pore types in a rapid and accurate way.

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