新型全谱岩性密度测井仪

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。

Development of a new full-spectrum litho-density logging tool

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.