地震信号倒谱分解技术及其在超深层碳酸盐岩储层烃类检测中的应用

张永升, 黄超, 刘军, 张永恒, 王兴建, 薛雅娟

Cepstrum decomposition of seismic signals and its application in hydrocarbon detection of ultradeep carbonate reservoirs

ZHANG Yong-Sheng, HUANG Chao, LIU Jun, ZHANG Yong-Heng, WANG Xing-Jian, XUE Ya-Juan

图6 过井剖面的一阶共倒谱剖面和共频率剖面 a—CWT提取的8 Hz共频率剖面,小波变换中使用Morlet小波;b—傅里叶变换倒谱提取的一阶共倒谱剖面;c—小波包倒谱提取的一阶共倒谱剖面

Fig.6 First-order common quefrency and common frequency sections of the seismic section intersecting the known well a—8 Hz common frequency section extracted by the CWT,Morlet wavelet is used in wavelet transform;b—first-order common quefrency section extracted by Fourier-based ceptrum;c—first-order common quefrency section extracted by the wavelet-based cepstrum