Seismic Q estimation using S-transform with regularized inversion
LIU Guo-chang1, CHEN Xiao-hong1, DU Jing2, LIU Yang3,4
1 State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum(Beijing),Beijing 102249,China;
2 Shengli Geophysical Research Institute of Sinopec,Dongying,Shandong 257022,China;
3 College of Geo-Exploration Science and Technology,Jilin University,Changchun,Jilin 130026,China;
4 Bureau of Economic Geology,University of Texas at Austin,Austin,Texas 78713,US
Abstract：The seismic quality factor Q is an important physical parameter in seismic exploration.The important information for hydrocarbon exploration can be provided by the factor Q.In this paper,we present a novel method for Q estimate using S-transform with regularized inversion.We first use S-transform to obtain the amplitude spectrum at different given travel time.When using the spectral ratio method,we do the division with shaping regularization,which constrains the ratio to have a desired behavior,such as smoothness.It can avoids the instability of division,which might be caused by noise,interfering reflectors,windowing distorts,etc.We use synthetic examples and a field data example to verify our method.These examples show that this method can estimate Q in stable way and can obtain more precise Q value compared with conventional method.
作者简介: 刘国昌,博士研究生,1982年生;2006年本科毕业于中国石油大学(北京),2007~2009年作为联合培养学生在美国德克萨斯大学奥斯汀分校(University of Texas at Austin)学习;现为中国石油大学在读博士生，主要研究领域为地震信号非稳态滤波处理和地球物理参数估计.
引用本文:
刘国昌, 陈小宏, 杜婧, 刘洋. 基于整形正则化和S变换的Q值估计方法[J]. 石油地球物理勘探, 2011, 46(3): 417-422.
LIU Guo-chang, CHEN Xiao-hong, DU Jing, LIU Yang. Seismic Q estimation using S-transform with regularized inversion. OGP, 2011, 46(3): 417-422.
