Instantaneous spectrum decomposition and fast interpretation of broadband seismic data
Cai Hanpeng1,2, He Zhenhua2,3, Li Yalin1, He Guangming1, Zou Wen1, Liu Kaiyuan1, Long Hao1
1. Geophysical Exploration Company, Chuanqing Drilling Engineering Co Ltd., CNPC, Chengdu, Sichuan 610213, China;
2. Key Lab of Earth Detection and Information Technology, Ministry of Education, Chengdu University of Technology, Chengdu, Sichuan 610059, China;
3. College of Geophysics, Chengdu University of Technology, Chengdu, Sichuan 610059, China
Abstract：Several iso-frequency instantaneous spectral data volumes generated from spectral decomposition of broadband seismic data (BBSD) not only occupy a great deal of storage resource, but also make the interpretation become huge workload. In order to overcome these problems, we propose a new solution. First we introduce a new BBSD spectral decomposition based on Fourier transform and generalized S transform (GST), which can improve time resolution of time-frequency spectra at low frequency. Then frequency band principal components analysis (DFBPCA) is proposed to implement the dimensionality reduction and optimization of broadband instantaneous data sets, which can maintain information characteristics with frequency. Finally a cluster separation measure is introduced into the fuzzy C-means clustering (FCM) to implement further adaptive fusion of data sets from DFBPCA. According to real data application, the proposed method decomposes BBSD into iso-frequency instantaneous spectral data sets with good time-frequency resolution, extracts fast and highlights the primary information contained in a large number of instantaneous spectral data sets, and depicts spatial distribution characteristics of reservoirs while reducing storage resource and improving BBSD interpretation.
蔡涵鹏, 贺振华, 李亚林, 何光明, 邹文, 刘开元, 龙浩. 宽频带地震数据瞬时谱分解及快捷解释方法[J]. 石油地球物理勘探, 2014, 49(5): 932-939.
Cai Hanpeng, He Zhenhua, Li Yalin, He Guangming, Zou Wen, Liu Kaiyuan, Long Hao. Instantaneous spectrum decomposition and fast interpretation of broadband seismic data. OGP, 2014, 49(5): 932-939.
