摘要：Fluid movement and grain boundary friction are the two main factors affecting the anelastic attenuation of seismic data. The quality factor (Q) quantifies the degree of anelastic attenuation and is commonly used in assisting the identification of gas reservoirs. We can accurately compute Q if we obtain the accurate amplitude spectrum of seismic wavelets at refereed and at target time indexes of the seismic profile. However, it is very difficult to obtain the accurate wavelets at the referred and target time indexes. Instead, we usually compare the changes of the amplitude spectrum of refereed and target seismic waveform. The seismic waveform is the convolution result between the seismic wavelet and the reflectivity series. Thus, the reflectivity series would affect our Q computation. We have assumed that the changes of the reflectivity series are negligible within one common-midpoint gather. Then the effect of relativity to the seismic spectrum is the same for the same seismic waveform at different offsets. The seismic waveforms at near offsets are treated as referred seismic signals, and the seismic waveforms at medium and far offsets are regarded as target seismic signals. We use simulated annealing to simultaneously obtain Q values at the entire time index of seismic traces. The method is applied to synthetic and real seismic data to demonstrate its validity and effectiveness. Both applications illustrate the effectiveness of the method in estimating seismic attenuation.

ISSN号：2324-8858

卷、期、页：卷: 8期: 2页: T441-T451

发表日期：2020-05-01

影响因子：1.394100

期刊分区（SCI为中科院分区）：四区

收录情况：SCIE（科学引文索引网络版）

发表期刊名称：INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION

参与作者：Bo Zhang,Yong, Xueshan

通讯作者：李胜军

第一作者：王尚旭

论文类型：期刊论文

论文概要：李胜军,Bo Zhang,Yong, Xueshan,王尚旭，Seismic quality factor estimation using prestack seismic gathers: A simulated annealing approach，INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION，2020，卷: 8期: 2页: T441-T451

论文题目：Seismic quality factor estimation using prestack seismic gathers: A simulated annealing approach