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    Class and Course
    1. NExT
    2. Petrotechnical
    3. Statistics and Petrophysics

    Statistics and Petrophysics

    • Foundation
    • 5 Days
    • classroom1Classroom
      • Average client rating (based on 135 attendee reviews)

    The purpose of this foundation course is to provide the participants with an understanding of how petrophysics and statistics are related.  Often the primary objective of reservoir petrophysics is to provide numerical transforms for total porosity, effective porosity, absolute permeability, lithology and water saturation.  These numerical transforms are then used as the basis for building static 3-D models.  To be a successful reservoir petrophysicists, you must understand statistical distributions, various averaging methods, smoothing, curve fitting and regression methods. Further, is necessary to understand when a dataset has statistical significance.
    Day 1
    • Discuss regression methods
    • Discuss quality of fit
    • Discuss different averaging methods
    Day 2
    • SW independent permeability prediction methods
    Day 3
    • SW dependent permeability prediction methods
    Day 4
    • Apply core log permeability calibrations
    • Compare base permeability to log calculated Sw
    • Demostrate the Kipling Approach
    Day 5
    • Participants will present their project results and their 3 Line method using Powerpoint and address key questions from the NExT instructors. This file will be preserved along with the project spreadsheet for future reference.

    Petrophysicists and geoscientists seeking to use statistics to improve their petrophysical interpretations.  

    Learning objectives of statistics and petrophysics include: 1. Learn basic statistics (mean, mode, distributions and standard deviation) and how these measures are applied in petrophysics 2. Present what is the significance of the quality of fit (R2) and residual analysis.  3. Present how multi-linear regression can be applied to improve the quality of fit (R2).  Evaluate adding grain size, VSH, gamma ray, lithology, additional porosity devices etc. The goal is to find the best possible relationship. 4. In some reservoir systems, the relationship between porosity and permeability is non-linear and in those cases it may be necessary to use a non-parametric approach such as Kipling™ or fuzzy logic relating to existing core data. 5. Several empirical methods exist such as Coates, Timur, Wiley-Rose, SDR, SPWLA and others.  Some of these methods are independent of initial water saturation, while others are not.  The final product should show Winland pore throat radius, petrophysical rock type and log computed Sw. The goal is to identify what mechanism is controlling the water saturation distribution

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