基于保边去噪的高精度相干体分析应用研究

High-accuracy Coherence Analysis Based on Edge-preserving Smoothing

相干体技术在揭示地层的横向变化及断层和复杂构造等方面与常规的地震振幅切片相比具有很大的优越性。但当原始振幅数据体信噪比较低时,相干体受噪声干扰较大,分辨率较差。为克服常规相干体计算受噪声影响较大的缺点,通过引入保边去噪技术,提出一种基于三维保边去噪(3DEPS)的相干体分析方法,在进行相干分析之前,先对原始振幅数据体做三维保边去噪,实际资料的计算结果显示,利用该方法得到的相干切片对断层和复杂构造的分辨能力得到显著提高。

Seismic coherence had more advantages from the aspect of revealing,lateral changes of strata, fault and complex structure compared to the conventional seismic amplitude slice .But when the original seismic amplitude data volume had lower signal to noise ratio, the coherence cube was seriously influenced by the noise,its ability of resolution was poor.In order to overcome the shortcoming with large influence of noise on the conventional calculation of coherence cube and by introducing 3-D edge-preserving smoothing technique, this paper presentsed a 3-D edge-preserving smoothing -based coherence analysis method,it first carried out edge-preserving smoothing prosessing of original seismic amplitude data volume before the coherence analysis.The computing results of practical data show that the ability to distinguish the fault and complex structure of the coherence slice gained by the method significantly increase.