摘要
基于计算相干体算法 ,提出了用模拟地震子波的小波函数 (或高分辨导数小波函数 )的小波变换 ,得到分频瞬时相位 ,再计算相干体的相干体算法 1和用小波变换得到的实、虚部 (相当Hilbert变换 )计算相干体的相干体算法 2 .在油田构造解释中 ,为了突出小断层特征 ,用分频计算出的相干体进行重构 .实际资料计算表明 ,相干体算法 2较K .J.Marfurt相干体算法抗噪声能力强 ;相干体算法 1较相干体算法 2在实际应用中效果更明显 .
Two methods of calculating coherence cube are put forward in frequency division on the basis of wavelet transform, and methods of M. Bahorich and K. J. Marfurt. The first method is for calculating coherence cube by using instantaneous phase of wavelet transform of wavelet functions (or derivative wavelet functions) simulating seismic wavelet; The second method is for calculating coherence cube by using the real and imaginary parts of wavelet transform above-mentioned wavelet functions. In order to identify characteristics of small faults under in oilfield structure, the coherence cube is reconstructed by calculating coherence cube in frequency division. The first method is testified to be more efficient than the second in terms of the application of oilfield.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第6期847-852,T004,共7页
Chinese Journal of Geophysics
基金
中国科学院知识创新工程重大项目 (KZCXL Y 0 1 )
国家自然科学基金和大庆石油管理局联合资助项目(4 98941 90 )
关键词
地震子波
小波变换
瞬时相位
分频计算
重构相干体
地震解释
Wavelet function, Wavelet transform, Instantaneous phase, Calculating in frequency division, Reconstructing coherence cube.
