干旱区生态环境知识资源中心(Arid): 曲波域随机噪声压制方法以沙漠地区叠后地震资料为例

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	曲波域随机噪声压制方法以沙漠地区叠后地震资料为例
其他题名	Random Noise Attenuation in Curvelet Domain By Taking Poststack Seismic Data of Desert Area for Example
	尹川; 杜向东; 沈野; 李少鹏; 王剑
来源期刊	石油天然气学报
ISSN	1000-9752
出版年	2014
卷号	36 期号:10 页码:78-81
中文摘要	沙漠地区油气勘探中,随机噪声是影响地震资料信噪比的主要因素之一。如何有效地压制随机噪声是沙漠地区地震资料处理必须解决的重要难题。传统小波域去噪将地震数据当作一种图像,对其进行多尺度分析,并通过阈值处理进行去噪。由于其无法表达二维地震图像的线性特征,在处理时存在一定的局限性。具有多尺度、多方向分析能力的曲波变换更适合具有曲线或者超平面奇异性的高维信号,将其引入到二维地震图像处理中,利用随机噪声和有效信号在方向上的差异,对噪声通过阈值收缩进行衰减。模型数据试验和实际叠后地震资料处理结果表明,曲波域去噪方法能够比小波域去噪方法更有效地压制随机噪声,减少对有效地震反射信号的损伤,从而证明了该方法的有效性和实用价值。
英文摘要	Radom noise was one of the most important factors affecting signal to noise ratio of seismic data in oil and gas exploration of desert areas.Therefore,how to attenuate random noise effectively was a vital problem in processing of seismic data in desert areas.Traditional wavelet transformation based denoising method took seismic data as an image,and it was analyzed in multiscales,and it was de-noised by threshold.Wavelet transformation could not express the linear characteristics of 2D seismic images,there existed limit when attenuating noises.Curvelet transformation with multiscales and multi-directions analyzing capability was more suitable for higher dimensional signal with curve or hyperplane singularity,therefore it was introduced for 2D seismic image processing.Random noise was attenuated by threshold by using the difference between random noise and valid signals in varying directions.The results of model data test and actual poststack data testing indicate that the curvelet based denoising method can attenuate random noise more effective than that of wavelet based denoising method,it diminishes the loss of valid seismic reflection wave,thus it is proved that the method is effective and practical.
中文关键词	曲波变换 ; 随机噪声 ; 阈值去噪 ; 小波变换
英文关键词	curvelet transform random noise threshold denoising wavelet transform
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:5265852
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231680
作者单位	中海油研究总院, 北京 100027, 中国
推荐引用方式 GB/T 7714	尹川,杜向东,沈野,等. 曲波域随机噪声压制方法以沙漠地区叠后地震资料为例[J],2014,36(10):78-81.
APA	尹川,杜向东,沈野,李少鹏,&王剑.(2014).曲波域随机噪声压制方法以沙漠地区叠后地震资料为例.石油天然气学报,36(10),78-81.
MLA	尹川,et al."曲波域随机噪声压制方法以沙漠地区叠后地震资料为例".石油天然气学报 36.10(2014):78-81.