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高分辨率密度测井探测器晶体尺寸的选择 被引量:4

Size Selection of Detector Crystal for High-resolution Density Logging
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摘要 为了合理选择探测器晶体尺寸,以提高高分辨率密度测井探测器对地层的反应能力和测量精度,应用Monte Carlo数值模拟技术,对不同半径的长、中间、短源距探测器晶体,分别计算得到了探测器计数随晶体长度的变化规律,探测器对地层灵敏度随晶体长度的变化规律。由计算结果得出,晶体的半径和长度直接影响到探测器的计数和对地层的灵敏度;短源距探测器晶体半径以稍小为宜,长度应低于1.7cm;中源距探测器晶体半径以稍大为宜,如1.4cm,长度宜在2~3.5cm之间;长源距探测器晶体半径应在仪器直径允许范围内以大为宜,长度宜在5~6.3cm之间。 To select the size of detector crystal rightly for high-resolution density logging and enhance its response ability to formation and measurement precision.Using Monte Carlo numerical simulation,calculates the changing law of detector count with crystal length,and the law of detector sensitivity with the length for long, middle and short spacing detector with various radiuses.Calculated results show that the radius and length influence directly detector count sensitivity for a crystal;crystal radius of short spacing detector should be little relatively,and its length should be less than 1.7 cm;middle spacing detector can have a bit large crystal radius such as 1.4 cm,and its length can be between 2 cm and 3.5 cm;the radius of long spacing detector should be large as soon as possible in tool diameter range,and its length can be between 5 cm and 6.3 cm.
出处 《核电子学与探测技术》 CAS CSCD 北大核心 2011年第3期364-367,共4页 Nuclear Electronics & Detection Technology
关键词 高分辨率密度测井 探测器晶体 尺寸 选择 high-resolution density logging detector crystal size selection
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参考文献4

  • 1K.A. Eyl, H. Chapellat, P. Chevalier, et al. High - Resolution Density Logging Using a Three Detector Device[C]. SPE28407, 1994:1 - 14.
  • 2C. Stoller, H.L. Darling, T. DasGupta,et al. Den- sity Logging in Slim Holes With a Novel Array Density Tool[C]. SPE 38650, 1997:69 -78.
  • 3J.F. Briesmeister. MCNP - A General Monte Carlo Code for Neutron and Photon Transport, Version 3B [ G]. Los Mamos Radiation Transport Group, 1985 : 1 -200.
  • 4吴文圣,黄隆基.三探测器密度测井的Monte Carlo模拟[J].地球物理学报,2004,47(1):164-170. 被引量:23

二级参考文献2

  • 1[2]K A Eyl. High-resolution density logging using a three detector device. SPE28407, 1994
  • 2[5]L L Carter, E D Cashwell. Particle-transport simulation with the Monte Carlo method. Los Alamos Scientific Laboratory, 1975

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