Interval attenuation estimation from prestack seismic data:A case study from the Arabian Peninsula  

作　　者：Abdullah Alshangiti Hua-Wei Zhou 

机构地区：[1]University of Houston,Department of Earth and Atmospheric Sciences,Houston,Texas,The United States

出　　处：《Applied Geophysics》2020年第4期475-488,共14页应用地球物理（英文版）

基　　金：This work was carried out as part of a Ph.D.research at the University of Houston.We thank Saudi Aramco for funding the research and providing the seismic data.We thank Dr.Carl Reine from Sound QI for providing the PSQI code.The Center of Wave Phenomenon(CWP)Seismic Unix programs TRIMODEL and TRISEIS were used to generate the synthetic seismic data.We thank Dr.Hao Hu for his comments and the anonymous reviewers for their reviews and suggestions.

摘　　要：Accurately estimated interval attenuation(1/Q)values have several applications,such as in quantitative interpretation and seismic resolution enhancement.Although Q values can be estimated by measuring the spectral ratio between seismic reflections from a target and a reference reflector,the results are influenced by factors such as overburden inhomogeneities.Here,we quantitatively analyze the overburden influence on interval Q estimations using the spectral ratio method,time-space domain prestack Q inversion(PSQI),andτ-p domain PSQI.We compare these three methods using a synthetic dataset and a field dataset acquired onshore the Arabian Peninsula.Synthetic seismic gathers are generated from a three-layer model with a low-Q inclusion in the first layer to mimic overburden inhomogeneity.The fi eld data are preconditioned image gathers from a producing oil fi eld.The synthetic data test shows that the small low-Q body produces a considerable error in estimated Q values.The smallest error(i.e.,13.3%)is in theτ-p domain PSQI result.Theoretically,τ-p domain PSQI could obtain more accurate Q values when there are overburden infl uences because of the simultaneous inversion scheme and the application in theτ-p domain.The fi eld data application also illustrates that theτ-p domain PSQI produces reasonable interval Q values.Our measured Q values are also comparable with the Q values estimated from hydrocarbon saturated carbonate reservoirs.

关 键 词：Attenuation quality factor Q overburden inhomogeneity spectral ratio prestack Q inversion 

分 类 号：P631.4[天文地球—地质矿产勘探] P618.13[天文地球—地质学]