Parameter optimization design of density logging tool based on underground X-ray source
This study evaluated the differences between Cs137 and X-ray density logging tools in terms of their energy spec-trum,density sensitivity and precision utilizing the Monte Carlo method,based on the parameters of the actual underground X-ray source.Subsequently,optimizations were performed on the energy window,shield thickness and detector-spacings of the X-ray density tool.Eventually,a novel four-detector density detection system was proposed.The investigation revealed that the optimal energy window for the X-ray density tool should range between 0.12 MeV and 0.35 MeV.The structure of the X-ray density tool doesn't require the addition of longitudinal tungsten shielding.To ensure density sensitivity and accuracy,it was suggested that the spacing between the near detectors should exceed 12.0 cm,while the spacing of the far detectors should be within the range of 29 cm to 55.5 cm.By adopting the four-detector detection system,the X-ray density tool was conferred ad-vantages such as high longitudinal resolution,sensitivity and accuracy concurrently,which is more suitable for complex reser-voir evaluation.Overall,this research offers valuable guidance for the design parameters of X-ray density logging tools.
density loggingX-ray sourceparameter optimizationdensity accuracydensity sensitivity
国家科技期刊平台
NSTL
万方数据
维普
