时间域属性组合法提取品质因子Q
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摘要
品质因子Q是表征地下介质对地震波吸收衰减特性的参量,在储层预测和油藏描述中有着重要的应用。频率域属性组合法利用地震波谱的统计属性(质心频率和惯心频率)组合估算Q值,具有较高的理论精度,但估算结果依赖波谱的提取质量。为避免地震波谱的提取,提出时间域属性组合法,根据时间域子波信息直接估算频率属性:对于常相位子波,其频谱质心频率等于包络峰值处的瞬时频率,惯心频率等于质心频率乘以子波导数包络峰值处的瞬时频率。当地震子波近似常相位时,可在时间域提取其质心频率和惯心频率,实现Q值的估算。模型和资料测试结果表明,时间域属性组合法估算Q值具有一定的可信度和可行性。
Quality factor Qis a parameter that describes wave attenuation characteristics in subsurface media,and it plays an important role in reservoir prediction and characterization.Frequency statistics attributes(mass centroid frequency and inertia frequency)in frequency domain is usually used to estimate Q.This method has theoretically high accuracy,but the estimates rely on spectrum extraction quality.To avoid seismic spectrum extraction,we propose in this paper a combination approach in time domain.The approach estimates directly frequency attributes from wavelets in time domain.For the constant phase wavelet,its mass centroid frequency is equal to the instantaneous frequency at the envelope peak,and its inertia frequency is equal to the instantaneous frequency at envelope peak of mass centroid frequency multiplied by the derivative of the wavelet.For a wavelet with an approximate constant phase,the mass centroid frequency and the inertia frequency can be directly extracted and the Qvalues can be estimated.Test results on model and real data show that estimating Qvalue by the proposed combination approach has credibility and viability.
引文
[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 Geophys,2005,20(4):1074-1082.
    [2]Kjartansson E.Constant Q-wave propagation and attenuation.J Geophys Res,1979,84:4737-4748.
    [3]Engelhard L.Determination of seismic-wave attenuation by complex trace analysis.Geophys,1996(125):608-622.
    [4]曹思远,赵宁,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.Cao Siyuan,Zhao Ning,Wang Zongjun et al.Seismic Qestimation by combinations of frequency statistics attributes.OGP,2013,48(4):545-552.
    [5]Quan Y L,Harris J M.Seismic attenuation tomography using the frequency shift method.Geophysics,1997,62(3):895-905.
    [6]Zhang Changjun,Ulrych T J.Estimation of quality factors from CMP records.Geophysics,2002,67(5):1542-1547.
    [7]刘国昌,陈小宏,杜婧等.基于整形正则化和S变换的Q值估计方法.石油地球物理勘探,2011,46(3):417-422.Liu Guochang,Chen Xiaohong,Du Jing et al.Seismic Qestimation using S-transform with regularized inversion.OGP,2011,46(3):417-422.
    [8]高静怀,杨森林.利用零偏移VSP资料估计介质品质因子方法研究.地球物理学报,2007,50(4):1198-1209.Gao Jinghuai,Yang Senlin.On the method of quality factors estimation from zero-offset VSP data.Chinese Journal Geophysics,2007,50(4):1198-1209.
    [9]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 Qinversion using zero-offset VSP data.Progress in Geophys,2010,25(6):1897-1904.
    [10]高静怀,杨森林,王大兴.利用VSP资料直达波的包络峰值处瞬时频率提取介质品质因子.地球物理学报,2008,51(3):853-861.Gao Jinghuai,Yang Senlin,Wang Daxing.Quality factor extraction using instantaneous frequency at envelope peak of direct waves of VSP data.Chinese Journal Geophysics,2008,51(3):853-861.
    [11]Barnes A E.Instantaneous spectral bandwidth and dominant frequency with applicitions to seismic reflection data.Geophysics,1993,58(3):419-428.
    [12]Barnes A E.Instantaneous frequency and amplitude at the envelope peak of a constant-phase wavelet.Geophysics,1991,56(7):1058-1060.
    [13]Tokson M N,Johnston D H,Timur A.Attenuation of seismic waves in dry and saturated rocks:Laboratory measurements.Geophysics,1979,44(4):681-690.
    [14]Tu N,Lu W K.Improve Qestimates with spectrum correction based on seismic wavelet estimation.Applied Geophysics,2010,7(3):217-228.
    [15]James R.Integrated estimation of interval-attenuation profiles.Geophysics,2006,71(4):19-23.
    [16]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.
    [17]李宏兵,赵文智,曹宏等.小波尺度域含气储层地震波衰减特征.地球物理学报,2004,47(5):892-898.Li Hongbing,Zhao Wenzhi,Cao Hong et al.Characteristics of seismic attenuation of gas reservoirs in wavelet domain.Chinese Journal Geophysics,2004,47(5):892-898.
    [18]Li Hongbing.Measures of scale based on the wavelet scalogram with applications to seismic attenuation.Geophysics,2006,71(5):V111-V118.
    [19]Reine C,Van der Baan M,Roger C.The robustness of seismic attenuation measurements using fixed and variable-window time-frequency transforms.Geophysics,2009,74(2):WA123-WA135.

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