摘要
地震波在黏弹性介质中传播时,能量会出现明显的衰减异常,并且随频率变化而不同.因此,本文从Q值基本定义出发,提出了一种基于Teager主能量的Q值提取算法.该算法首先由广义S变换得到信号的时频谱,然后在时频域计算地震波的单频Teager-Kaiser能量,并得到Teager-Kaiser主能量,最后计算抽样波长距离内的相对衰减量,得到衰减拟Q值,实现油、气、水层的有效表征.该方法将能量属性与储层定性表征联系在一起,为储层预测提供了一种新思路,实际数据的应用效果表明该方法可以有效的区分油、水层.
The energy of seismic wave shows significant attenuation anomalies and changes with frequency, when it propagates in viscoelastic media. Therefore,according to the basic definition of the Q value,this paper presents a Q value extraction algorithm based on the Teager main energy. First,the algorithm got the timefrequency spectrum of seismic signal by a generalized S transform.And then,calculate the single-frequency Teager-Kaiser energy of seismic waves in the time-frequency domain and got Teager-Kaiser main energy. At last,calculates a relative attenuation among the sample wavelength distance,obtained the attenuation Q value,and realized effective characterization of the oil,the gas and the water layers. The method linked energy attributes to reservoir characterization qualitative,and provides a new way of reservoir prediction. Real data application results show that this method can effectively distinguish between oil and water layers.
出处
《地球物理学进展》
CSCD
北大核心
2016年第1期411-416,共6页
Progress in Geophysics
基金
中石化股份公司项目(P12047)
博士后基金项目(YKB1219)
国家高技术研究发展计划(863)重点项目(2011AA060300)联合资助
