应用于声波测井的FIR数字滤波器设计  

The Design of FIR Digital Filter Applied in Acoustic Logging

作　　者：刘先平[1,2] 鞠晓东[1,2] 邓林 卢俊强[1,2] 门百永[1,2] 

机构地区：[1]中国石油大学油气资源与探测国家重点实验室,北京102249 [2]北京市地球探测与信息技术重点实验室,北京102249 [3]中国石油集团测井有限公司华北事业部,任丘062552

出　　处：《科学技术与工程》2011年第15期3536-3539,共4页Science Technology and Engineering

基　　金：国家自然科学基金面上项目(40874097);国家科技重大专项(2011ZX05020-009)资助

摘　　要：为了提高声波测井数据采集的精度,利用MATLAB设计了一种可以在FPGA中实现的FIR滤波器。根据声波测井数据特点选取汉宁窗设计滤波器。根据FPGA的特征对滤波器系数进行了量化。通过信号仿真分析表明信噪比可提高6 dB。硬件实现后通过对实际声波测井数据的测试表明,信噪比得到明显改善,该方法也可作为数据压缩和抽取时的前端处理。To improve the accuracy of acoustic logging data acquisition,a FIR filter that can implement in FPGA was designed through the using of MATLAB.According to the data characteristics of acoustic logging,Hanning window was selected to design the filter.The filter coefficients were quantized following the FPGA＇s characteristics.The simulation analysis shows that the signal can improve SNR 6 dB.The test result on actual acoustic logging data after hardware implementation shows that the SNR is obviously improved.This method can also be used as the front-end processing of data compression and extraction.

关 键 词：声波测井 FIR数字滤波器 系数量化 信噪比 

分 类 号：TE151[石油与天然气工程—油气勘探]