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伴随粒子碳氧比能谱测井系统利用伴随粒子快中子飞行时间法,可以排除俘获γ射线的干扰,显著提高碳氧比值的准确性。大庆测井公司研制的伴随粒子碳氧比能谱测井仪样机实际测井时存在有效计数率低、γ总谱氢峰不明显导致的刻度不准确等问题。作者经过几年的技术探索,从γ射线的探测、信号放大、脉冲幅度分析等模拟电路方面入手,找到了一系列提高仪器性能的方法。
Accompanying the particle-to-oxygen ratio logging system can eliminate the interference of trapping γ-rays and improve the accuracy of the C / O ratio by using the accompanying fast neutron time-of-flight method. There are some problems such as low effective counting rate and inaccurate calibration of γ-spectrum peak due to the actual well logging with the sample developed by Daqing Well Logging Company. After several years of technical exploration, the author started with a series of analog circuits such as gamma ray detection, signal amplification and pulse amplitude analysis, and found a series of methods to improve the performance of the instrument.