As noted in Chapter 10, the transmission of gamma rays through matter can be related to the electron density if the predominant interaction is Compton scattering. In the borehole environment, a transmission measurement is not possible. However, a gamma ray transport measurement through a formation can be used to determine its density. With some information on the material composition (lithology and pore fluids), the porosity can be determined.
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Ellis, D.V., Singer, J.M. (2007). Gamma Ray Scattering and Absorption Measurements. In: Ellis, D.V., Singer, J.M. (eds) Well Logging for Earth Scientists. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-4602-5_12
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DOI: https://doi.org/10.1007/978-1-4020-4602-5_12
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