摘要
作为提高地震数据纵向分辨率的有效手段,反褶积技术一直是地震勘探领域的研究热点。传统反褶积方法采取逐道稀疏反演的策略重构地下反射系数序列,忽视了相邻地震道之间的空间关系,反褶积结果空间连续性不佳。应用全变分(Total Variation,TV)约束的多道地震反褶积方法虽然能够改善由逐道反演引起的空间不连续,但由于未考虑地质构造信息,因而仅适用于“块状”构造。为了克服这一问题,文中提出一种自适应方向TV(Adaptively Directional TV,ADTV)约束的多道地震反褶积算法。该方法基于局部地质构造方向构建ADTV正则化项,不像传统TV约束仅考虑水平和垂直方向的信息。因此,ADTV可以更好地保护弱小反射信号,更清晰地刻画地质体的空间展布,在地质构造复杂的情况下也能保证反褶积结果的空间连续性。模型测试和实际资料处理结果均表明,该方法可以提供分辨率高、空间连续性强的反褶积结果。
As an effective method to improve the vertical resolution of seismic data,the deconvolution technique has been being a research hotspot in the field of seismic exploration.The traditional seismic deconvolution method adopts a trace-by-trace sparse inversion strategy to reconstruct the subsurface reflectivity series,which ignores the spatial relationship between adjacent seismic traces,resulting in poor spatial continuity of the deconvolution result.Although the multichannel seismic deconvolution method based on total variation(TV)constraint can mitigate the spatial discontinuity caused by the trace-by-trace inversion,it is only applicable to block structures because it does not consider the geological structural information.To overcome this problem,a multichannel seismic deconvolution algorithm with adaptively directional TV(ADTV)constraint is proposed in this paper.The approach constructs the ADTV regularization based on the local geological structure direction,unlike traditional TV regularization that only consider horizontal and vertical directions.Therefore,ADTV can better protect weak reflection signals,more clearly depict the spatial distribution of the subsurface geological bodies,and guarantee the spatial continuity of the deconvolution result in the case of complex geological structures.Both synthetic and field data processing results show that the proposed method can provide deconvolution results with high resolution and strong spatial continuity.
作者
张元鹏
张强
王玲谦
周辉
董春晖
张明珠
ZHANG Yuanpeng;ZHANG Qiang;WANG Lingqian;ZHOU Hui;DONG Chunhui;ZHANG Mingzhu(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang,Hebei 065000,China;National Modern Geological Exploration Engineering Technology Research Center,Langfang,Hebei 065000,China;China University of Petroleum(Beijing),Beijing 102249,China;Geophysical Research Institute,Geophysical Division,China Oilfield Services Limited,Tianjin 300451,China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2024年第6期1269-1279,共11页
Oil Geophysical Prospecting
基金
国家重点研发计划变革性技术关键科学问题重点专项课题“高分辨率地震成像软件系统开发及应用”(2018YFA0702505)
国家自然科学基金项目“多元数据与Zoeppritz方程联合驱动的智能叠前AVO反演方法研究”(42304120)
中国石油大学(北京)青年拔尖人才科研启动基金项目“地质构造导向的地质统计学建模与反演方法研究”(2462023BJRC032)
中国博士后科学基金项目“稀疏表征驱动的井震联合宽带叠前AVO反演方法研究”(2023M733870)联合资助。
关键词
反褶积
构造约束
ADTV正则化
高分辨率
空间连续性
deconvolution
structural constraint
adaptively directional TV(ADTV)regularization
high resolution
spatial continuity
