基于同步挤压变换的水合物储层地震信号时频分析  

A SYNCHROSQUEEZING TRANSFORM BASED TIME-FREQUENCY ANALYSIS ON SEISMIC SIGNALS OF HYDRATE RESERVOIRS

作　　者：张建中[1,2] 刘晗[1,2] 黄忠来[1,2] 赵铁虎[3] 孙运宝[3] 

机构地区：[1]中国海洋大学海洋地球科学学院,青岛266100 [2]海底科学与探测技术教育部重点实验室,青岛266100 [3]中国地质调查局青岛海洋地质研究所,青岛266071

出　　处：《海洋地质前沿》2015年第6期23-29,共7页Marine Geology Frontiers

基　　金：中国地质调查局国家海洋地质专项(GZH201100308);国家自然科学基金(41074077;41230318)

摘　　要：同步挤压变换是一种新的时频分析方法,通过对信号进行小波变换,并重排(挤压)所得到的小波系数谱,得到比小波变换等常用时频变换更高的时频分辨率。使用同步挤压变换对含水合物储集层的合成地震数据以及南海神狐海域的实测地震资料进行了处理,并与小波变换结果进行了对比。结果表明,同步挤压变换对地震数据的处理结果具有更高的时频分辨率,能够反映地震信号频率的精细变化,用于识别和圈定水合物储层。The Synchrosqueezing Transform（SST）is a new time-frequency analysis method.SST can obtain the time-frequency（t-f）resolution better than common time-frequency transforms such as wavelet transform and so on,by performing wavelet transform on the signal and reassigning（squeezing）the corresponding coefficient spectrum.In this paper,both continuous wavelet transform（CWT）and SST are applied to process the synthetic seismic data from a model containing hydrate reservoirs and a real seismic data collected from the Shenhu area of the South China Sea.The test results show that SST is able to provide seismic profiles with higher t-f resolution than CWT,which can reflect more detailed change in frequency of seismic signal and help us identify and delineate hydrate reservoirs more precisely.

关 键 词：同步挤压变换 时频分析 地震信号 水合物储层 

分 类 号：TE122[石油与天然气工程—油气勘探] P315[天文地球—地震学]