论文详情

钻井液波信号处理方法比较

石油钻采工艺

2007年 29卷第2期

阅读：61

查看详情

Title

Comparative study on mud-pulse signal processing methods

作者

张恒李安宗李传伟屈景辉廖琪梅

Authors

ZHANG Heng LI An-zong LI Chuan-wei QU Jing-hui LIAO Qi-mei

单位

第四军医大学生物医学工程系计算机应用教研室, 陕西西安 710032 中国石油集团测井有限公司, 陕西西安 710061

摘要

无线随钻测量系统中的脉冲信号受各种噪声的干扰,在井口需要还原脉冲信号,实时监测井底的情况。采用傅立叶变换和小波变换2种方法对钻井液波信号进行了处理,并尝试性地采用相关系数来评判去噪效果的优劣。对巴特沃斯、切比雪夫和小波变换3种处理方法的结果进行了比较。结果表明:小波变换对这种信号的噪声抑制效果较好;对于钻井液波信号噪声的处理,小波变换明显地优于傅里叶变换;相关系数能够用来评判钻井液波信号处理结果的优劣。

Abstract

The mud-pulse signal in the wireless measurement while drilling system is disturbed by varieties of noises.This paper uses Fourier transform and wavelet transform to process the signal,and attempts to use correlation coefficient to estimate the processing result.Based on the correlation coefficient,it compares the processing result by using Butterworth,Chebychev and wavelet transform.Results show that wavelet transform is the optimal processing method.Wavelet transforming is better than Fourier transforming in processing the mud signal for de-noising,and the correlation coefficient can be used to judge the de-noising quality in the mud signal.

关键词：

随钻测量; 噪声; 小波变换; 相关系数;

Keywords:

measurement while drilling; noise; wavelet transform; correlation coefficient;

基金项目

DOI

10.3969/j.issn.1000-7393.2007.02.024