【摘要】 为了解决强相干高斯色噪声干扰下地震层位无法正确拾取的问题,文中提出了一种基于互四阶累积量一维切片的地震层位自动拾取方法,阐述了该方法的基本原理和具体算法。该方法利用地震层位上横向波形的相似性以及互四阶累积量一维切片对高斯噪声不敏感的特点,实现了同相轴的时间延迟估计;同时对直接影响地震层位拾取精度的相关参数进行了设定。理论模型计算表明,该方法对相干高斯色噪声有很强的抑制能力,信噪比达到-10dB。实际资料应用结果与原始数据的地质层位吻合较好,断层、断点位置准确,其拾取精度不亚于人工方法的精度,而效率远远高于人工方法。更多还原

【Abstract】 In order to solve the problem in which the seismic horizon can not correctly picked up under the strong coherent Gaussian colored noise,an automatic seismic horizon picking-up method based on one dimensional slice of cross fourth order cumulant was proposed in this paper.The basic principle and exact algorithm of the method were also elaborated in this paper.The similarity of the seismic horizon over the horizontal direction and the insensitivity of the cross fourth order cumulant to Gaussian colored noise were utilized in realizing the time delay estimation of the seismic events,meanwhile the relevant parameters which directly affect the picking-up accuracy of the seismic horizon were set.The calculation for the theoretical model shows that the method has very strong restraining ability for the coherent Gaussian colored noise and its signal to noise ratio reaches-10dB.The application effects of the field data match well with the geological horizons and the locations of the faults and the fault points were accurate.It is noticed that the picking-up accuracy of the method could replaces that of the manual method,however its efficiency is much higher than the manual method.更多还原