基于小波变换的相干技术在断层解释中的应用

The Application of wavelet transform coherency algorithm in seismic data interpretation

基于小波变换的相干技术在抑制噪声的能力和减少计算量方面优势显著.将小波变换方法与相干体技术相结合,提出了一种基于小波变换的相干体计算的新方法,并将小波变换相干体技术应用在XY区块复杂断裂断层检测中.实践证明,小波变换相干体技术可以得到突出特定频带的相干体,适用不同品质的地震资料,相对于常规相干技术更能突出不同层次的地质特征.

The paper introduces the algorithm of the coherence cube on the basis of wavelet transform. The algorithm combines the wavelet transform method with coherence cube technology from the view of enhancing the ability to suppress noises and to improve the computing quality. The study result shows that one can choose the proper wavelet transform parameter and appropriate coherent processing parameter to the seismic data of different qualities, so as to extract the coherence cube in a given frequency divisiom one can also reconstruct the coherence cube that calculate in frequency division through different weights, so as to stand out the coherence cube of a given frequency. The wavelet transform coherency technique has been applied in real fault detection in the oil fields and achieved good results.