叠前地震波形指示反演在薄互储层预测中的应用

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英文篇名：Application of prestack seismic waveform indicates inversion in thin reservoir prediction 作者：段南 英文作者：DUAN Nan;Department of Earth Science and Engineering,Imperial College London; 关键词：叠前波形指示反演 ; 弹性参数 ; 薄储层预测 ; 水下分流河道砂 英文关键词：Prestack seismic waveform indicates inversion;;Elastic parameters;;Thin reservoir prediction;;Underwater distributary channel sand 中文刊名：DQWJ 英文刊名：Progress in Geophysics 机构：伦敦帝国理工学院地球科学与工程学院; 出版日期：2018-10-24 09:23 出版单位：地球物理学进展 年：2019 期：v.34;No.154 基金：中国石油化工股份有限公司项目(P12047)资助 语种：中文; 页：DQWJ201902014 页数：6 CN：02 ISSN：11-2982/P 分类号：113-118

摘要

地震波形指示反演在高频段通过将地震波形信息代替变差函数,使得反演过程及结果能够更好的体现了"相控"的概念,并且能够有效提升预测储层纵向及横向分辨率,在薄层、薄互储层预测上是地质统计学反演之外一种新的、更高效的反演手段.针对J4井区纵波阻抗无法有效识别河道砂薄互储层的问题,通过横波速度估算,计算得到一系列弹性参数,优选出对砂泥岩识别最敏感的弹性参数,创新尝试在叠前域使用地震波形指示反演敏感参数体,最终达到对目标薄互储层"定量"识别的目的.应用结果表明:在叠前域使用地震波形指示反演代替常规反演可以很好的解决薄层预测中纵横向分辨率不高、纵波阻抗无法有效识别砂泥岩的问题,对同类型储层定量预测具有一定的借鉴意义.
        The seismic waveform indication inversion embodies the concept of "phase control" by using seismic waveform information to replace variation function in high frequency band. The technology improves the vertical and horizontal resolution of the reservoir effectively, and it is a new inversion method to indict thin and mutual reservoir as well as geostatistical inversion. The poststack seismic waveform indication inversion has advantages in the prediction of thin reservoir, while the prestack elastic parameters are richer and more sensitive to reservoir. In response to the failure of the impedance of J4 area to effectively identify the thin channel sand reservoir, the target thin layer is achieved qualitative identification by using transverse velocity estimation, elastic parameter calculation and optimization. Application results show that in prestack domain using seismic waveform indicates inversion can well solve the problem of vertical and horizontal resolution is not high and the wave impedance cannot effectively identify sand and mudstone. The method has a reference to the quantitative prediction of the same type reservoir.

引文

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