摘要：Seismic attenuation can be quantified by quality factor Q. Accurate estimation of Q factor is of great significance in exploration geophysics. Currently, most Q estimation methods are based on plane wave theory and assume that the reflection effect is frequency-independent. In fact, real seismic surveys use localized sources which produce spherical waves rather than plane waves. Thus spherical wave theory can give more precise description of real seismic reflection than plane wave theory. However, spherical wave reflectivity (SWR) is frequency-dependent and the frequency-dependent effect is often neglected. In this paper, we use a two-layer model to illustrate the influence of the frequency-dependence of SWR on seismic attenuation estimation. Tests show that the amplitude spectrum of reflection spherical wave has an obvious frequency shift to low frequency compared with the original wavelet spectrum. The estimated Q value is smaller than the real one due to the frequency-dependent effect of SWR. Thus it is important to consider the influence of frequency-dependent SWR on Q estimation in order to accurately estimate and compensate for attenuation.

发表日期：2016-01-01

期刊分区（SCI为中科院分区）：无

收录情况：EI（工程索引）,国际学术会议论文集

发表期刊名称：78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential

通讯作者：陶永慧,李京南

第一作者：王尚旭,董春晖,袁三一,赵晨光

论文类型：会议论文

论文概要：陶永慧,王尚旭,李京南,董春晖,袁三一,赵晨光，The effect of frequency-dependent reflection coefficient on seismic attenuation estimation，78th EAGE Conference and Exhibition 2016: Efficient Use of Technology - Unlocking Potential，2016，

论文题目：The effect of frequency-dependent reflection coefficient on seismic attenuation estimation