基于系统辨识提高地震资料分辨率研究  

High frequency restoration of surface seismic data based on system identification

作　　者：刘浩杰[1] 王延光[1] 韩文功[2] 

机构地区：[1]中国石化胜利油田分公司物探研究院,东营257022 [2]中国石化胜利油田分公司,东营257000

出　　处：《地球物理学进展》2010年第3期994-999,共6页Progress in Geophysics

基　　金：中国博士后科学基金项目(20070411107);国家"863"计划资助项目(2007AA060504)联合资助

摘　　要：提高地面地震资料垂向分辨率是地球物理领域研究的难点和热点.本文提出了基于系统辨识利用测井资料提高地面地震资料分辨率的新方法.通过地层对地震波吸收的线性系统假定,首先建立了地面地震信息与声波测井信息相互联系的理论模型,然后基于系统辨识技术估计地层对地震波吸收的系统特性,进而对地面地震资料进行补偿性高频恢复.对不同分辨率的正演模拟资料、实际地面地震资料的处理结果表明,该技术在保持原地震资料主要特征不变的条件下,使主频为代表的优势频带提高约10～20Hz,频带拓宽约10Hz,有效提高了地震资料的垂向分辨率.It is difficult to characterize subtle stratigraphic details accurately by surface seismic data with poor vertical resolution. A new method to restore high frequencies within the seismic bandwidth by utilizing velocity logging data has been proposed in this paper. On the assumption that seismic waves attenuate linearly in formations, a theoretical model is derived firstly to link surface seismic data and velocity logging data, and then the absorption system response is evaluated based on system identification technology, which can be used to compensate the attenuated high frequencies within the surface seismic bandwidth. The results of high frequency restoration for the forward modelling data and the actual surface seismic data show that the new method can enhance the vertical resolution of the surface seismic data significantly, which will advance the dominant frequency by 10Hz and 20Hz, widen the frequency band about lOHz, while the principal features of the original surface seismic data still hold.

关 键 词：分辨率 系统辨识 测井 地震 联合应用 

分 类 号：P631[天文地球—地质矿产勘探]