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| Quality factor Q estimation based on linear fitting of centroid frequency curve |
| Li Junjun1,2, Wang Zhizhang1, Zhang Zhihuan1, Jiang Dan2 |
1. College of Geoscience, China University of Petroleum (Beijing), Beijing 102249, China;
2. Geophysical Department, China Oilfield Services Limited, CNOOC, Tianjin 300450, China |
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Abstract Quality factor Q is an important parameter of hydrocarbon detection and reservoir characterization, which reflects seismic wave attenuation. Centroid frequency shift (CFS) is one of the most common methods to estimate Q. We derive a new linear formula based on this method in Quality factor Q estimation. In this formula, the centroid frequency of seismic wavelets reduces linearly with the propagation time, and the slope of curve is the reciprocal of Q. Thus, Q value can be estimated by fitting the centroid frequency curve of wavelets. Model and real data tests show that the linear relationship does not rely on the shape of source wavelet spectrum, and linear fitting has certain robustness.
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Received: 15 October 2014
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| [1] |
马昭军,刘洋.地震波衰减反演研究综述.地球物理学进展,2005,20(4):1074-1082.
|
|
Ma Zhaojun,Liu Yang.A summary of research on seismic attenuation.Progress in Geophysics,2005,20(4):1074-1082.
|
| [2] |
Tonn R.The determination of the seismic quality factor Q from VSP data:A comparison of different computational methods.Geophysical Prospecting,1991,39(1):1-27.
|
| [3] |
Quan Y,Harris J M.Seismic attenuation tomography using the frequency shift method.Geophysics,1997,62(3):895-905.
|
| [4] |
武银婷,朱光明,刘伊克等.零偏VSP反演Q值CFS方法及影响因素研究.地球物理学进展,2010,25(6):1897-1904.
|
|
Wu Yinting,Zhu Guangming,Liu Yike et al.Study on CFS method in Q inversion using zero-offset VSP data.Progress in Geophysics,2010,25(6):1897-1904.
|
| [5] |
赵宁,曹思远,王宗俊等.频域统计性属性组合提取品质因子Q.石油地球物理勘探,2013,48(4):545-552.
|
|
Zhao Ning,Cao Siyuan,Wang Zongjun et al.Seismic Q estimation by combinations of frequency statistics attributes.OGP,2013,48(4):545-552.
|
| [6] |
Aki K,Richards P G.Quantitative Seismology.San Fransisco:I W H Freeman and Co,1980.
|
| [7] |
魏文,李红梅,穆玉庆等.中心频率法估算地层吸收参数.石油地球物理勘探,2012,47(5):735-739.
|
|
Wei Wen,Li Hongmei ,Mu Yuqing et al.Estimation of stratigraphic absorption parameter based on center frequency method.OGP,2012,47(5):735-739.
|
| [8] |
赵静,高静怀,王大兴等.利用叠前CMP资料估算介质品质因子.地球物理学报,2013,56(7):2413-2428.
|
|
Zhao Jing,Gao Jinghuai,Wang Daxing et al.Estimation of quality factor Q freom pre-stack CMP records.Chinese Journal of Geophysics,2013,56(7):2413-2428.
|
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2015, Vol. 50 
