分布式声传感器井中背景噪声统计特性分析  

Statistical Analysis for Background Noise of Borehole Distributed Acoustic Sensing

作　　者：钟铁[1,2] 李月 ZHONG Tie;LI Yue(Key Laboratory of Modem Power System Simulation and Control&Renewable Energy Technology,Ministry of Education,Northeast Electric Power University,Jilin 132012,China;School of Electrical Engineering,Northeast Electric Power University,Jilin 132012,China;College of Communication Engineering,Jilin University,Changchun 130012,China)

机构地区：[1]东北电力大学现代电力系统仿真控制与绿色电能新技术教育部重点实验室,吉林吉林132012 [2]东北电力大学电气工程学院,吉林吉林132012 [3]吉林大学通信工程学院,长春130012

出　　处：《吉林大学学报（信息科学版）》2021年第1期8-14,共7页Journal of Jilin University（Information Science Edition）

基　　金：国家自然科学基金资助项目(41974143);吉林省优秀青年人才基金资助项目(20180520091JH);吉林市杰出青年人才培育专项基金资助项目(20200104116)。

摘　　要：分布式声传感器技术(DAS:Distributed Acoustic Sensor)是一种新近提出的高精度勘探数据采集方法,受制于复杂背景噪声的影响,DAS记录处理水平有待进一步提高。针对上述问题,采用基于替代序列的时间序列平稳性检验方法和Lilliefors检验法对DAS记录中复杂背景噪声的平稳性和高斯性进行研究。用以分析的实际地震数据是按照勘探工业要求采集的井中DAS记录。研究结果表明,DAS背景噪声是非平稳、非高斯随机过程且噪声特性随记录时长发生变化。相关研究成果实现了针对DAS背景噪声特性的可靠认知,对提高DAS记录处理水平具有重要参考价值。DAS(Distributed Acoustic Sensor)technology is a novel high-precision acquisition method.And DAS is considered as a new generation of seismic data acquisition technology which has the potential to replace the traditional seismometer array.However,the processing ability for the DAS records needs to be further improved due to the influence of complex background noise.To solve the problems,the stationarity and Gaussianity of complex DAS background noise are investigated by using the time series stationarity testing method based on substituted series and Lilliefors test method respectively.The actual seismic data analyzed are the borehole DAS records collected under the requirements of actual exploration industry.The results show that DAS background noise is a non-stationary and non-Gaussian random process.The noise characteristics have been tested changing with the noise recorder length.The accurate understanding for the characteristic of DAS background is obtained,which has potential significance for improving processing capability of DAS data.

关 键 词：分布式声传感器(DAS) 背景噪声 统计特性 平稳性 高斯性 

分 类 号：TN911.72[电子电信—通信与信息系统]