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补偿密度探测器滑板在测量地层密度过程中与井壁的贴合程度,直接关系到测量结果。而滑板与井壁的贴合能力则主要决定于所选择的滑板曲率半径。接收窗口的面积(主要决定于宽度)大小则关系到接收射线计数率的高低;反映了测井资料受涨落误差的影响程度,关系到密度资料的使用价值。本文通过对探测器滑板在测井过程中同井壁的贴合状况,推导出滑板曲率半径与被测量井眼曲率半径、接收窗口宽度的关系。当被测井眼直径为7～10英寸时,滑板曲率半径的最佳值为90毫米,窗口最大宽度为25毫米。
Compensate the density of the detector skateboard in the process of measuring the formation density of the well wall fit, is directly related to the measurement results. The skateboard and wall fit ability is mainly determined by the selected radius of curvature of the skateboard. The size of the receive window (mainly determined by the width) is related to the count rate of the received radiation; it reflects the extent to which logging data is affected by the fluctuation error and is related to the use value of the density data. In this paper, the relationship between the curvature radius of the slide and the radius of the wellbore to be measured and the width of the receiving window is deduced by fitting the detector skateboard to the wellbore during logging. When the wellbore diameter is 7 to 10 inches, the optimum radius of curvature of the slider is 90 mm and the maximum window width is 25 mm.