消除50Hz干扰波的地震资料处理新方法A NEW METHOD FOR SEISMIC DATA PROCESSING OF ELIMINATING 50Hz DISTURBING WAVE
李文艳,牛彦良,吴明华
LI Wen yan; NIU Yan liang; WU Ming hua (Exploration and Development Research Institute of Daqing Oil Field Company Ltd.;
摘要(Abstract)：
目前 ,大庆地区高分辨率地震采集资料的主频范围主要为 4 0～ 60Hz ,而 5 0Hz工业电简谐波与有效信号的主要频段重叠 ,严重影响地震信号的保真度 ,使得剔除单炮记录中 5 0Hz干扰波成为地震资料处理中不容忽视的问题。为此 ,提出一种崭新的处理思路及实现方法 ,即根据 5 0Hz信号具有固定频率和初相位的简谐振动及振幅特性 ,采用互相关原理检测并剔除 5 0Hz干扰波。该方法的优点是在消除 5 0Hz干扰波的过程中保证有效信号不受影响 ,进而极大地提高了地震信号的保真度 ,为地震储层预测奠定了基础
The dominant frequency scope of high resolution seismic acquired data in Daqing Oil Field is 40 60Hz. 50 Hz industrial electro simple harmonic wave is superimposed with the main frequency zone of the effective signal and has a influence on the fidelity of the seismic signal. To eliminate 50Hz disturbing wave in single shot record is an important problem in seismic data processing. This paper proposes a new method, i.e., to examine and eliminate 50Hz disturbing wave using relative principle according to the existed frequency of 50Hz signal and the simple harmonic oscillation and amplitude property of the initial phase. This method can increase the fidelity of seismic signal.
关键词(KeyWords)：
地震采集;互相关;50Hz干扰波
seismic acquirement; cross spectrum; 50Hz disturbing wave
基金项目(Foundation):
作者(Authors):
李文艳,牛彦良,吴明华
LI Wen yan; NIU Yan liang; WU Ming hua (Exploration and Development Research Institute of Daqing Oil Field Company Ltd.;