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| | 講演要旨(英文) | | Shale volume is one of the key parameter used for an adequate measurement of effective porosity, water saturation, and hydrocarbon saturation. However, with a limited data and more critical assessment of shale volume emerging in recent years, the shortcomings in the interpretation of the shale volume as an important parameter of measuring petrophysical properties are increasingly evident. Calculating shale volume from gamma ray log is a commonplace but validation of measurement is still a challenge. In this study, we look into four different approaches for shale volume calculation based on gamma ray log response, and critically appraise their similarities and potential for the application of petrophysical properties. The estimated shale volume with conventional methods is used to measure petrophysical properties. These petrophysical properties are then used in Gassmann model to predict P-wave velocity. The estimated P-wave velocities with different approaches are compared with logged P-wave velocity and choose the best fit method for shale volume calculation in our area. |
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