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本文应用MonteCarlo数值模拟方法,计算了窗形、楔形γ源准直孔和窗形、楔形、槽形探测器准直孔以及开口角度对探测器计数率和地层灵敏度的影响。结果表明,γ源的准直孔形状和开口角度对测量精度的影响远大于探测器准直孔形状和开口角度;γ源和探测器的准直孔形状和开口角度对计数率的影响远大于对地层灵敏度的影响;45°楔形γ源准直孔、0°窗形长源距探测器准直孔、5°-15°的窗形中源距探测器准直孔和0°窗形短源距探测器准直孔会提高高分辨率密度测井的测量精度。
In this paper, Monte Carlo numerical simulation method is used to calculate the influence of window shape, wedge-shaped γ source collimation hole and window, wedge and groove detector collimation hole and aperture angle on detector counting rate and formation sensitivity. The results show that the influence of the aperture shape and the aperture angle of the γ source on the measurement accuracy is far greater than the shape of the aperture and the angle of the aperture of the detector. The influence of the shape and angle of the aperture of the γ source and the detector on the count rate is far greater On the formation sensitivity; 45 ° wedge-shaped γ source collimation hole, 0 ° window-shaped long source from the detector collimation hole, 5 ° -15 ° window-shaped source detector aperture and 0 ° window short Source-detector alignment holes improve the accuracy of high-resolution density logging.