摘要
基于传统的Morlet时频原子库的匹配追踪时频表征方法存在时频分辨率不可调的缺点,解决实际问题的能力受到限制。通过引入分辨率调节参数,使Morlet小波的时频分辨率灵活可控,在此基础上提出了可变分辨率的匹配追踪时频表征方法,实现时间分辨率和频率分辨率分别可调的目的。在薄层频谱成像中,利用可变分辨率匹配追踪时频表征方法来提高匹配追踪时频分布的时间分辨率,可以有效避免复杂地质背景的干扰,实现薄储层的清晰成像。
Matching pursuit time-frequency characterization method based on traditional Morlet time-frequency atoms dictionary cannot adjust the time-frequency resolution,which limits the application on actual data.In order to solve the problem,we introduced resolution adjustment parameter to make the time-frequency resolution of Morlet wavelet flexible and controllable.On this basis,the variable resolution matching pursuit time-frequency characterization method was developed to realize adjustable for time resolution and frequency resolution.In the spectrum imaging of thin reservoir,our method was used to enhance the time resolution of matching pursuit time-frequency distribution,which can effectively avoid the interference of complex geological background and achieve a clear image of thin reservoir.
出处
《石油物探》
EI
CSCD
北大核心
2012年第3期213-218,209,共6页
Geophysical Prospecting For Petroleum
基金
国家自然科学基金(41004050)项目资助
