Data mining based investigation of the impact of imbalanced dataset over fractured zone detection

  • Authors

    • Haleh Azizi School of Electrical Engineering and Computer Sciences, University of North Dakota, Grand Forks, ND, 58201, USA
    • Hassan Reza School of Electrical Engineering and Computer Sciences, University of North Dakota, Grand Forks, ND, 58201, USA
    2021-06-11
    https://doi.org/10.14419/ijet.v10i2.31604
  • Accuracy, Classifier, Fractured Reservoirs, Random Forest, Support Vector Machine.

  • Abstract

    Several studies have been conducted in recent years to discriminate between fractured (FZs) and non-fractured zones (NFZs) in oil wells. These studies have applied data mining techniques to petrophysical logs (PLs) with generally valuable results; however, identifying fractured and non-fractured zones is difficult because imbalanced data is not treated as balanced data during analysis. We studied the importance of using balanced data to detect fractured zones using PLs. We used Random-Forest and Support Vector Machine classifiers on eight oil wells drilled into a fractured carbonite reservoir to study PLs with imbalanced and balanced datasets, then validated our results with image logs. A significant difference between accuracy and precision indicates imbalanced data with fractured zones categorized as the minor class. The results indicated that the accuracy of imbalanced and balanced datasets is similar, but precision is significantly improved by balancing, regardless of how low or high the calculated indices might be.

     

     

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  • How to Cite

    Azizi, H., & Reza, H. (2021). Data mining based investigation of the impact of imbalanced dataset over fractured zone detection. International Journal of Engineering & Technology, 10(2), 116-123. https://doi.org/10.14419/ijet.v10i2.31604

    Received date: 2021-05-25

    Accepted date: 2021-05-31

    Published date: 2021-06-11