基于稀疏脉冲反褶积的分频地震层序分析方法及应用  

Sparse-spike deconvolution promoting frequency dependent seismic stratigraphic analysis and an application

作　　者：刘畅[1] 张琴[1] 

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249

出　　处：《地球物理学进展》2014年第2期780-785,共6页Progress in Geophysics

基　　金：国家自然科学基金项目(ZX20130157)资助

摘　　要：地震数据中低频成分倾向于反映较厚的岩性地层单元,而高频成分倾向于刻画较薄的等时沉积单元,因此地震分频解释有助于精细沉积层序分析.但目前地震沉积学方法中使用频率滤波方法得到的分频剖面中,地层反射信息不全,不是真正意义上的分频地层反射剖面.为此,本文提出了一种基于时变子波稀疏脉冲反褶积的分频地震层序分析方法,目的是为了得到地层信息较全的真分频地层反射剖面.拟合例子中使用本文提出方法得到的分频地层反射剖面与真实情况相差非常小,验证了本文方法的准确性和有效性.对三角洲前积沉积层序的实例分析,可以清楚得到原始地震剖面中无法显示的细层层序,可用于精细层序分析.Low-frequency components of seismic data tend to characterize thicker litho-stratigraphic units, while high-frequency components tend to characterize thinner isochronous-stratigraphic units. Thus, frequency dependent interpretation can help to achieve fine sedimentary sequence analysis. However, in current seismic sedimentology method, a certain frequency profile generated by frequency filtering, loses some stratum reflection information, which is out of the limited frequency band. To achieve real frequency dependent stratum reflection profiles with whole stratum information, a time-varying sparse-spiking deconvolution based method is proposed in this paper. A synthetic example and a real delta progradation example show the accuracy and effectiveness of proposed method.

关 键 词：稀疏脉冲反演 分频解释 地震层序分析 地震沉积学 

分 类 号：P631[天文地球—地质矿产勘探]