曹卫平^1,2,,
黄旭日^1,2,
姚海¹,
胡叶正^1,2,
徐云贵^1,2,
唐静^1,2
1. 西南石油大学地球科学与技术学院, 成都 610500
2. 油气藏地质及开发工程国家重点实验室, 成都 610500


详细信息

作者简介: 曹卫平, 男, 1980年生, 博士生导师、教授, 主要从事地震信号分析、地震成像、反演等方面的研究.E-mail: caoweiping@gmail.com

中图分类号: P631;P315

收稿日期:2021-01-04
修回日期:2021-03-12
上线日期:2021-07-10

Seismic interferometry for traffic noise recorded by a distributed acoustic sensing system

CAO WeiPing^1,2,,
HUANG XuRi^1,2,
YAO Hai¹,
HU YeZheng^1,2,
XU YunGui^1,2,
TANG Jing^1,2
1. School of Earth Sciences and Technologies, Southwest Petroleum University, Chengdu 610500, China
2. State Key Laboratory of Oil and Gas Reservolr Geology and Exploitation, Chengdu 610500, China


MSC: P631;P315

--> Received Date: 04 January 2021
Revised Date: 12 March 2021
Available Online: 10 July 2021


摘要
摘要:分布式光纤声波传感系统(DAS)是近年来迅速发展的高密度、低成本的地震观测设备，已经在基于面波的速度层析反演、反射成像、微地震监测等多个领域显示巨大潜力.本文基于美国加利福尼亚州Garner Valley实验中DAS记录的交通噪声数据，分析交通噪声数据特点，并利用地震干涉方法从交通噪声记录提取出近地表传播的面波信息.结果显示，利用记录时长6 s的DAS记录的车辆噪声数据，可以提取与主动源数据信号信噪比略高、特征一致的面波记录.同时，分析比较了互相关干涉、反褶积干涉和互相干干涉三种方法.结果显示三种方法均能从Garner Valley实验中DAS系统记录的公路噪声中有效提取面波信息，其中的互相干干涉和互相关干涉结果具有较高的高信噪比，互相干干涉和反褶积干涉结果有更优的频带宽度.
关键词: 分布式光纤声波传感系统/
地震干涉/
交通噪声/
面波分析

Abstract:Distributed acoustic sensing (DAS) system is a recently developed low-cost high-density seismic acquisition instrument and has demonstrated remarkable potential in various fields including surface wave tomography, reflection imaging, and microseismic monitoring. With the traffic noise data record with a DAS system in Garner Valley in California USA, the characteristics of DAS traffic noise are analyzed, and surface wave data are extracted from the traffic noise using seismic interferometry. It has been demonstrated that using a DAS traffic noise record with only 6 seconds record length, surface wave data can be extracted with comparable signal quality to active source data. Also, three interferometric algorithms, cross-correlation, deconvolution, and crosscoherence interferometry are compared using this traffic noise dataset. The comparison indicates crosscoherence and crosscorrelation interferometry results show the optimal signal-to-noise ratio, and crosscoherence and deconvolution interferometry results demonstrate wider frequency bandwidth.
Key words:Distributed acoustic sensing system/
Seismic interferometry/
Traffic noise/
Surface wave dispersion



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