石油地质与工程2024，Vol.38Issue(4)：112-119,8.
CEEMD-SG滤波在固井质量测井资料处理中的应用
Application of the CEEMD-SG filtering method in well cementing quality logging data processing
摘要
Abstract
At present,the evaluation of cementing quality mainly relies on acoustic variable density logging data.Due to the influence of double-layer casing,the variable density image may sometimes exhibit signif-icant distortion due to the superposition of inner and outer casing waves,which can interfere with the evalua-tion of cementing quality.In order to obtain real variable density images and eliminate"false anomalies",a complementary set empirical mode decomposition(CEEMD)and Savitzky-Golay(SG)filtering method are combined to propose a CEEMD-SG filtering method for processing acoustic variable density logging da-ta.Firstly,the CEEMD is used to decompose the variable density data,and then the Fourier transform is used to analyze the original signal and each intrinsic mode function(IMF)obtained from the decomposition.High frequency IMF components are selected for processing using the SG filtering algorithm.Finally,the fil-tered high frequency components and the low frequency components obtained from CEEMD decomposition are combined to reconstruct the processed signal.Using this method to process the actual variable density data of Tarim Oilfield,and comparing it with three methods:CEEMD,wavelet threshold,and SG filtering,the results show that the CEEMD-SG filtering method can better eliminate the waveform superposition in-terference caused by double-layer casing,and the processed data can meet the on-site acceptance re-quirements.关键词
测井资料处理/固井质量测井/互补集合经验模态分解/SG滤波Key words
logging data processing/cementing quality logging/complementary set empirical mode decom-position(CEEMD)/SG filter分类
天文与地球科学引用本文复制引用
刘建建,刘媛媛,田博宁,樊琦,陈章龙,杨居朋,刘洋..CEEMD-SG滤波在固井质量测井资料处理中的应用[J].石油地质与工程,2024,38(4):112-119,8.基金项目
中国石油集团测井有限公司课题"CPLog智能远程采集软件系统研发与应用"(CPL2021-A07). （CPL2021-A07）
