联合ISVD和小波变换的声波全波列测井时频特征研究  

Study on time-frequency characteristics of acoustic full-wave train logging using a combination of ISVD and wavelet transform

作　　者：胡永 高强[2] 杨凡凡 周丽洁 姜东廷 姚晓勇 向旻[3,4] Hu Yong;Gao Qiang;Yang Fanfan;Zhou Lijie;Jiang Dongting;Yao Xiaoyong;Xiang Min(156 Coal Field Geological Exploration Team,Xinjiang Coal Field Geological Bureau,Urumqi 830001,China;The Fourth Geological Brigade,Hebei Bureau of Geology and Mineral Exploration(Hebei Provincial Water Source Conservation Research Center),Chengde 067000,China;Xinjiang University of Engineering,Urumqi 830001,China;Xinjiang Key Lab of Geohazard Prevention,Urumqi 830001,China)

机构地区：[1]新疆煤田地质局一五六煤田地质勘探队,新疆乌鲁木齐830001 [2]河北省地质矿产勘查开发局第四地质大队(河北省水源涵养研究中心),河北承德067000 [3]新疆工程学院,新疆乌鲁木齐830001 [4]新疆地质灾害防治重点实验室,新疆乌鲁木齐830001

出　　处：《能源与环保》2024年第4期107-111,117,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：新疆维吾尔自治区自然科学基金项目(2017D01B08)。

摘　　要：声波全波列测井动力学特征的研究通常包括时间域方法和频率域方法,但是2种方法均将时间和频率特征割裂开来。为了改善这一问题,拟探索声波全波列测井时频特征。首先改进奇异值分解,将声波全波列测井信号按照能量高低分解为主信号和次信号,继而利用小波变换,得到各信号分量的时频分布。结果表明,相比致密性地层,裂缝性地层,纵波、横波和斯通利波的时间均有延迟;纵波和横波的主频出现下降;纵波、横波、斯通利波及伪瑞利波幅度均有不同程度的衰减,其中,斯通利波衰减程度最大。The study of the dynamic characteristics of acoustic full-wave train logging usually includes time domain and frequency domain methods,but both methods separate the time and frequency characteristics.In order to improve this problem,this article intended to explore the time-frequency characteristics of acoustic full-wave train logging.Firstly,the singular value decomposition was improved to decomposing an acoustic full-wave train logging signal into the main signal and the secondary signal.Then,wavelet transform was used to obtain the time-frequency distribution of each signal component.The conclusion indicates that compared to dense formations,for fractured formations,the time of P-wave,S-wave,and Stoneley waves was delayed;the main frequency of P-wave and S-wave decreased;the amplitudes of P-wave,S-wave,Stoneley wave and pseudo-Rayleigh wave were attenuated to varying degrees,among which Stoneley wave was the most attenuated.

关 键 词：声波全波列测井 改进奇异值分解 小波变换 时频分布 

分 类 号：P631.4[天文地球—地质矿产勘探]