Nuclear Techniques ›› 2017, Vol. 40 ›› Issue (11): 110404-110404.doi: 10.11889/j.0253-3219.2017.hjs.40.110404


Research on neutron-gamma logging with an 241Am-Be source based on LaBr3:Ce detector

WAN Wenjie1, ZHOU Wei1, ZHOU Jianbin1, ZHAO Xiang1, YU Jie1, HE Xuxin2, LUO Xiang2, QIN Hongjiang2, XIANG Qiulin3   

  1. 1 College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu 610059, China;
    2 China Petroleum Group Logging Co., Ltd., Xi'an 710032, China;
    3 CNNC Jianzhong Nuclear Fuel Co., Ltd., Yibin 644000, China
  • Received:2017-03-17 Revised:2017-04-20 Online:2017-11-10 Published:2017-11-08
  • Supported by:
    Supported by National Natural Science Foundation of China (No.11675028), National Key Research and Development Plan (No.2016YFC1402505), Science and Technology Talent Project (No.2016099)

Abstract: Background: The widely used bismuth germanium oxide (BGO) detector has low energy resolution in neutron well logging, and thus cannot meet the requirements of some practical applications. Purpose: This study aims to obtain high energy resolution spectrum using a LaBr3:Ce detector in neutron-gamma logging. Methods: Several common geochemical elements such as H, C and Fe were measured using 241Am-Be neutron source with LaBr3:Ce detector in a radioisotope neutron testing well belonging to China Petroleum Group Logging Corporation, and a commonly used BGO detector was employed to provide a comparison with LaBr3:Ce detector under the same well logging test condition. Results: The energy spectrum of LaBr3:Ce detector exhibited higher energy resolution than that of BGO detector, and a clear signal of Fe whilst a very weak Fe signal in energy spectrum of LaBr3:Ce detector. Conclusion: The application of LaBr3:Ce detector in nuclear logging has a promising prospect.

Key words: 241Am-Be neutron source, LaBr3:Ce detector, Energy resolution, Logging

CLC Number: 

  • TL812