阵列声波测井中反射纵波和横波信号提取方法  

Extraction method of P and S reflection waves from array acoustic logging data

作　　者：王兵[1,2] 陶果[1,2] 王华[1,2] 李卫[1,2] 谭博蕾[1,2] 

机构地区：[1]中国石油大学油气资源与探测国家重点实验室,北京102249 [2]中国石油大学北京市地球探测与信息技术重点实验室,北京102249

出　　处：《中国石油大学学报（自然科学版）》2011年第2期57-63,共7页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家科技重大专项(2008ZX05000-020);国家重点基础研究计划项目'973'(2007CB209601);国家自然科学基金(50674098)

摘　　要：将双树复小波(DT-CWT)和慢度时间相关法(STC)相结合,同时利用尺度-时间域及阵列慢度信息,提出一种提取反射波信号的多尺度相关分析方法。应用倾角叠加来进一步压制直达模式波和噪声以增强反射信号,同时可以对P-P反射和S-S反射进行分离。通过有限差分模拟的数据和声反射成像测井仪器对某油田测得的实际数据进行处理。结果表明,所提出的反射信号处理方能更有效地去除各种噪声,更精确地分离反射波小信号。A multi-scale semblance method for the separation and velocity（slowness） analysis of the reflected waves and the guided waves was presented.This new method is a combination of the dual tree complex wavelets transform（DT-CWT） and the slowness-travel time coherence（STC） method.It is specially designed for the newly developed tools with ultra-long source-receiver spacing for acoustic reflection survey.Dip stacking was used to enhance and separate the P-P and S-S reflection signals and suppress the direct waves and other noises.Processing examples with finite difference modeling data and field recorded full waveform data from one oilfield by the acoustic reflection imaging tool of Dagang Logging Company were presented to show the applicability of the proposed algorithm.

关 键 词：声反射测井 参数估计法 几何扩散因子 多尺度相关 倾角叠加 

分 类 号：TE19[石油与天然气工程—油气勘探]