Gamma density logging method is used to measure the volume density of the cement sheath.

伽马密度测井测量水泥环体密度，这种测量方法与固井各胶结面状态无关。

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In-depth study, we research on how to use logging data such as sound waves, density, natural gamma to obtain rock parameters, and study how to use indoor core test to amendment it.

深入研究了如何利用声波、密度、自然伽马等测井资料确定岩石力学参数的方法，并研究了如何利用室内岩心试验对测井资料进行简单的修正。

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