提高黄土塬地震资料信噪比的方法研究
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摘要
以鄂尔多斯盆地西南部巨厚黄土塬区地震勘探为例,针对黄土塬地震资料信噪比低的特点,以中生界与古生界砂岩储层预测和古地貌刻画为目标,通过对影响地震资料信噪比的因素分析和不同去噪技术的研究,提出了适应黄土塬区提高地震资料信噪比的有效方法,并在实际应用中取得了良好的效果.
Taking the seismic exploration of the loess tableland of huge thickness in the southwestern Erdos Basin as an example,the factors of influencing the signal-noise ratio of the loess tableland seismic data are analyzed in order to predict the reservoir characteristics of Mesozoic and Paleozoic and describe their paleogeomorphology,and a series of denoising methods are proposed,including united static correction,surface consistency remaining fine correction,high-precision velocity analysis,multi-area or multi-area alternating noise suppression and coherent superposition.These methods are very effective to improving the seismic data signal-to-noise ratio in the loess tableland area.The practical application in the loess tableland of huge thickness in the southwestern Erdos Basin achieved good effect.
Taking the seismic exploration of the loess tableland of huge thickness in the southwestern Erdos Basin as an example,the factors of influencing the signal-noise ratio of the loess tableland seismic data are analyzed in order to predict the reservoir characteristics of Mesozoic and Paleozoic and describe their paleogeomorphology,and a series of denoising methods are proposed,including united static correction,surface consistency remaining fine correction,high-precision velocity analysis,multi-area or multi-area alternating noise suppression and coherent superposition.These methods are very effective to improving the seismic data signal-to-noise ratio in the loess tableland area.The practical application in the loess tableland of huge thickness in the southwestern Erdos Basin achieved good effect.
引文
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[3][美]渥.伊尔马兹.地震资料分析[M].北京:石油工业出版社,2006:239-244.Wo.Yilmaz[USA].Seismic Data Analysis[M].Bei-jing:Petroleum Industry Press,2006:239-244.
[4]高少武,赵波,祝树云,等.余弦函数自适应法识别与消除单频干扰[J].石油地球物理勘探,2011,46(1):64-69.GAO Shao-wu,ZHAO Bo,ZHU Shu-yun,et al.Identifica-tion and suppression of singal frequency interference by u-sing cosin function adaption method[J].Oil GeophysicalProspecting,2011,46(1):64-69.
[5]高少武.单频干扰识别与消除方法研究[D].成都:成都理工大学,2010.GAO Shao-wu.Research on identification and eliminationmethod of mono-frequency interference[D].Chengdu:Chengdu University of Technology,2010.
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