【摘要】 复杂断裂区的地震资料受到采集、处理中多个环节多种因素的影响,往往信噪比较低、成像质量较差.能够有效抑制噪声同时保持地震反射结构信息的解释性处理是更好、更快地进行构造解释的前提.为此,提出了将地层反射倾角信息与各向异性扩散滤波技术相结合的方法,对复杂构造区低品质地震资料进行滤波处理,以提高地震资料的信噪比,增强地震反射同相轴一致连续性,突出断层边界特征.模型正演合成记录和实际资料应用效果表明,基于倾角控制的构造导向滤波,不仅有效地压制了噪声,使得同相轴的一致连续性增强,并保留了断层、裂隙等边缘细节信息,在剖面上更容易识别和解释层位和断层.通过倾角控制滤波的相干属性消除了陡倾地层造成的背景干扰,断裂展布更加清晰,更有利于构造目标的精细解释.更多还原

【Abstract】 Seismic data of complex fault zone is severely affected by many factors in seismic acquisition and processing,so it usually has low signal to noise ratio and bad imaging quality.To eliminate random noise effectively and keep the structure information of seismic reflection at the same time is the basis of better and faster interpretation in these areas.This paper proposed a method by combination of dip information of seismic reflection and anisotropic diffusion filter technique,to improve the SNR of seismic data in complex fault zone,enhance the coherence of seismic reflection event,and highlight the edges.Results of numerical trial and application in real 3ddata indicate that,the dip controlled anisotropic diffusion filter has effectively smoothed the reflection event without blurring relevant details of faults and discontinuities,making it easier to identify horizons and faults on seismic sections.The similarity time slice based on filtered data has wiped out the background noise caused by dip stratums.The distribution of faults on similarity slices of anisotropic diffusion filtered data are much clearer than that on similarity slice of raw data or median filtered data,hence show the efficiency of dip controlled diffusion filter.更多还原