Abstract：Starting from the equation of instantaneous parameters and scale energy in wavelet domain,the paper considered that the energy attribute and 'instantaneous attributes in wavelet scale domain can represent attenuation character of seismic signal in a certain scale scope and defined them as attenuation attributes of seismic wave in wavelet scale domain. Its meanings are as follows:(1)the scale of scale energy of real seismic signal can reach maximum at extreme point and scale energy of reflected signal exponentially decreases with the decrease of scale within a "bandpass" scope starting at that scale; (2) the scale energy computed within the "bandpass" area along the small-scale direction starting in the scale at extreme point is called as energy-attenuated attribute of seismic wave scale, the instantaneous parameters sections in relative scale are also classified as the category of attenuation attribute in wavelet scale of seismic wave. The theoretical study and analysis of cases showed that the attenuation attribute of wavelet is more sensitive to gas reservoir by comparison with ordinary instantaneous amplitude attribute, the detective effects by attenuation attribute of wavelet is obviously better than that by ordinary instantaneous amplitude attribute when detecting the thin gas-bearing beds or on noise-bearing seismic records.
李宏兵, 赵文智, 曹宏, 姚逢昌, 邵龙义. 应用小波尺度域地震波衰减属性检测气层[J]. 石油地球物理勘探, 2005, 40(4): 411-416.
Li Hong- bing, Zhao Wen-zhi, Cao Hong, Yao Feng-chang, Shao Long-yi. Detection of gas reservoir by using seismic attenuation attributes in wavelet-scale domain. OGP, 2005, 40(4): 411-416.
