时空变换在地震数据处理中的应用
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摘要
在三维地震数据、非纵地震数据、弯曲测线地震数据中,线性噪声的时距关系表现为非线性特征,用常规去噪方法难以有效去除。本文通过定义一个新的空间距,利用已知的地震波速度计算其在新空间下的时距关系,对数据进行等间距时空变换,将非纵及三维测线中呈非线性变化的线性噪声线性化,再将其去除。经实际地震数据处理应用,效果明显。
For the 3D seismic data,off-line seismic data and crooked seismic line data,the time-distance relation for the linear noise shows non-linear feature and it is difficult to remove such linear noise by routine de-noise methods.By defining a new space distance,utilizing known seismic velocity to calculate time-distance relation in the new space and conducting time to space transform with equal interval for the data,the non-linear noise was linearizd,then was eliminated.The results of the field data processing proved the method's effectiveness.
For the 3D seismic data,off-line seismic data and crooked seismic line data,the time-distance relation for the linear noise shows non-linear feature and it is difficult to remove such linear noise by routine de-noise methods.By defining a new space distance,utilizing known seismic velocity to calculate time-distance relation in the new space and conducting time to space transform with equal interval for the data,the non-linear noise was linearizd,then was eliminated.The results of the field data processing proved the method's effectiveness.
引文
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[2]阎世信,吕其鹏.黄土塬地震勘探技术.北京:石油工业出版社,2002:96
[3]蔡希玲,张俊桥.复杂地表区噪声分析技术与压噪方法应用.石油地球物理勘探,2002,37(增刊):1~4Cai Xi-ling,Zhang Jun-qiao.Noise analysis and sup-pressing in complex near-surface areas.OGP,2002,37(Supplement):1~4
[4]阎世信.山地地球物理勘探技术.北京:石油工业出版社,2000:90~92
[5]夏洪瑞,周开明.地震资料处理中相干干扰消除方法分析.石油物探,2003,42(4):85~91Xia Hong-rui,Zhou Kai-ming.Elimination of coherentinterference in seismic data processing.GeophysicalProspecting for Petroleum,2003,42(4):85~91
[6]陆基孟.地震勘探原理(上册).山东东营:石油大学出版社,2004:22~60
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[8]郭东润.三维地震勘探中的非纵问题.石油地球物理勘探,1982,17(4):9~15Guo Dong-run.Discussion about broadside issue inthree dimensional seismic exploration.OGP,1982,17(4):9~15
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