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S变换时变滤波在去噪处理中的应用研究

APPLICATION RESEARCH ON TIME VARIABLE FILTERING WITH S-TRANSFORM IN DENOISING PROCESSING

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【作者】 杨海涛朱仕军杨爱国常智彭才

【Author】 YANG Hai-tao1,ZHU Shi-jun2,YANG Ai-guo1,CHANG Zhi1,PENG Cai1(1.Sichuan Petroleum Geophysical Prospecting Company,Chuanqing Drilling Engineering Company Limited,CNPC,Chengdu Sichuan 610213,China;2.School of Resources and Enviroment,Southwest Petroleum University,Chengdu Sichuan 610500,China)

【机构】 中国石油川庆钻探工程有限公司地球物理勘探公司西南石油大学资源与环境学院

【摘要】 针对常用的滤波去噪方法都受到使用条件的限制,实际资料的滤波去噪不能达到良好效果,S变换时变滤波克服了传统滤波去噪方法滤波因子不能随时间、频率变化而变化的缺陷。将地震资料用S变换方法变换到时频域,对不同时间内不同频率的噪声部分充零,再将去噪后的地震数据利用S反变换到时间域,以获得所需要的有效信号。通过理论计算分析和实例计算表明,S变换时变滤波能够有效去除不同时段、不同频率的噪声。该方法具有一定的可行性。

【Abstract】 There are several kinds of filtering methods to diminish the noises.However,all of them are restricted by operating conditions,as a result,a satisfactory effect of filtering can not be obtained from actual data.Time variable filtering with S-transform overcomes the shortage that the filtering factors in traditional filtering and denoising approaches will not change with time and frequency variation.Seismic data are transformed to time-frequency domain by using the S-transformation methods,then,the noises at different time intervals and with different frequencies are zeroized partly.Finally,the seismic data after noise elimination are transformed into time domain again by using S-inverse transformation to achieve the effective signals needed.Based on theoretical and real seismic data calculation,it is believed that S-transform is really an effective method eliminating noises at different time intervals and with different frequencies.

  • 【文献出处】 西南石油大学学报(自然科学版) ,Journal of Southwest Petroleum University(Science & Technology Edition) , 编辑部邮箱 ,2009年06期
  • 【分类号】P631.4
  • 【被引频次】18
  • 【下载频次】464
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