脉冲响应字典架构的薄层谱分解方法  

Thin-layer spectral decomposition method based on impulse response dictionary architecture

作　　者：李雪英[1,2] 王福霖 万乔升 Li Xueying;Wang Fulin;Wan Qiaosheng(School of Earth Sciences, Northeast Petroleum University, Daqing 163318, China;Heilongjiang Oil & Gas Reservoir Forming Mechanism & Resource Evaluation Key Laboratory, Daqing 163318, China)

机构地区：[1]东北石油大学地球科学学院,黑龙江大庆163318 [2]黑龙江省油气藏形成机理与资源评价重点实验室,黑龙江大庆163318

出　　处：《黑龙江科技大学学报》2021年第3期279-288,共10页Journal of Heilongjiang University of Science And Technology

基　　金：国家自然科学基金项目(52078398,51978213)。

摘　　要：为准确获得薄层地震响应的时频特征及其分辨率,提出一种脉冲响应字典架构的薄层谱分解方法,通过提取Ricker子波在单界面上的脉冲响应作为原子,构建过完备脉冲响应字典,实现基追踪算法分解地震数据。结果表明,脉冲响应字典架构的薄层谱分解方法相比于传统的Ricker子波字典谱分解方法具有相同的时域分辨率,频率聚焦性提升了3倍,有利于分析薄砂层及等厚薄互层时频特性。This paper proposes a thin-layer spectral decomposition method based on the impulse response dictionary framework,which is designed to accurately achieve the time-frequency characteristics and resolution of the thin-layer seismic response.The method works by extracting the impulse response of the Ricker wavelet on a single interface as an atom,constructing an over-complete impulse response dictionary and decomposing the seismic data by the basis pursuit algorithm.The results show that the thin-layer spectral decomposition method based on the impulse response dictionary framework has the same time-domain resolution as the traditional Ricker wavelet dictionary spectral decomposition method,but boasts three fold improvement in the frequency focus,benefiting the analysis of the time-frequency characteristics of thin sand layer and equal thickness thin interbed.

关 键 词：地震勘探 薄层 基追踪 谱分解 脉冲响应字典 等厚薄互层 

分 类 号：P631[天文地球—地质矿产勘探]