多属性相干方法识别微小断层

Identification of Minor Fault Based on Multi-attribute Seismic Coherence Technology

受地震资料分辨率的影响,在常规地震剖面上直接解释小断层往往比较困难。为了提高对小断层解释的精度和合理性,本文介绍了基于地震子体的综合相干系数、倾角和方位角的多属性相干方法。在计算相干系数的同时,将倾角和方位角考虑进去,得到多属性的相干图件。实际资料的处理表明:与常规的相干方法相比,多属性相干方法更能突出地震波形不相干的地方,提高对小断层的识别能力。

It is very difficult to interpret minor faults directly from seismic profile because of limited resolution of seismic data. In order to improve the precision and rationality of minor faults interpretation, we introduce a new coherence method, which integrated correlate co- efficient, dip and azimuth, based on multi--attribute of seismic data. Considered the dip angle and azimuth angle, this method often produces better results. Satisfactory results have been achieved by applying this technique in interpretation of real 3--D seismic data. More minor faults are found, which would be impossible to be found on conventional seismic volume or coherency cube.