The paper introduces a new full-spectrum lithology density logging tool. It is capable to collect full spectrum data during well logging. This logging tool can generate a complete spectrogram, and provide more stratum information to satisfy users' needs. The logging tool is mainly based on field programmable logic device ( FPGA ) , which is practical for data collecting and processing. The pulse conditioning circuit is designed to ensure the accuracy of detection. In order to ensure real-time data transmission,the dual port RAM is applied with the use of the high-speed AD,which is applicable for data quantizing. This new full-spectrum lithology density logging tool can be widely used in well logging industry because the spectrogram is accurate and the system operation is stable after simulation experiments and system testing.%设计了1种新型全谱岩性密度测井仪.该仪器能在测井过程中对核脉冲信号进行全谱采集,可形成完整谱图,提供更多的地层信息,满足用户需要.该仪器基于现场可编译逻辑器件(FPGA)设计,用于数据采集和数据处理.为保证探测精度设计了脉冲调理电路,同时配合使用高速AD进行数字量化,采用双端口RAM技术保证数据传输的实时性.通过仿真实验和系统测试,仪器测得谱图准确,系统运行稳定,可广泛应用于生产测井.
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