地震波形反演技术在砂泥岩薄互层结构表征中的应用  

The application of seismic amplitude inversion for the characterization of interbedded sand-shale reservoirs

作　　者：刘财[1] 裴思嘉 郭智奇[1] 符伟[1] 陈树民[2] 张宇生 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026 [2]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [3]中石油东方地球物理公司,河北涿州072751

出　　处：《地球物理学报》2017年第5期1893-1902,共10页Chinese Journal of Geophysics

基　　金：国家自然科学基金项目(41430322和41404090);中国石油科学研究与技术开发项目(2016A-33)资助

摘　　要：基于传播矩阵理论开发砂泥岩薄互层地震合成记录算法,与褶积算法、基于界面模型的Zoeppritz方法以及波动方程等方法相比,该方法更适用于具有复杂结构的薄互层模型,能够在充分考虑地震反射波动力学因素的同时不受网格间距的限制.基于正演算法开发了基于波形对比的砂泥岩薄互层地震反演技术,由地震反射波形特征的变化反演薄地层单元中砂体含量与空间位置等参数,进而确定薄互层段砂泥岩组合结构以及砂体的空间展布.理论模型验证了反演方法的有效性.通过测井分析建立薄互层地震地质模型,并将该技术应用于研究区实际地震数据,反演的砂体空间分布与测井资料进行对比分析,验证了反演方法的实用性.The method based on propagation matrix develops the sand-shale thin interbed synthetic seismogram algorithm, compared with conventional seismic forward method ,such as convolution algorithm, Zoeppritz method based on the interface reflection, the wave equation and so on, this method is more suitable for the space with complex geological structure model of thin interbed, which can take fully into account the seismic reflection dynamics factor, without being restricted by the grid spacing. The method based on forward modeling, develops thin sand-shale interbed of seismic inversion technology based on waveforms comparison, inverse numbers of layers of sand layers unit and the spatial location parameters, and then,realize the thin sand-shale interbed combination structure and seismic inversion technique of spatial distribution, through reflection waveform characteristics. Identification inversion technique through theoretical model, and establish seismic geological model through the log analysis, then, apply the technology into real seismic data inversion. After that, compare the calculation result of spatial distribution of sandwith the analysis of the actual logging data, which verify the effectiveness of the inversion method.

关 键 词：薄互层 地震反演 波形对比 传播矩阵 砂体展布 

分 类 号：P631[天文地球—地质矿产勘探]