地震高分辨率非线性反演在薄互储层识别中的应用

Application of seismic high resolution nonlinear inversion to thin and interbedded reservoir recognition

将地震高分辨率非线性反演方法应用于地震频带窄、主频低和信噪比低的鄂尔多斯盆地鄂北区块地震剖面的反演,获得了品质高和分辨率高的地震反演剖面(速度剖面)。应用这种高分辨率反演剖面对鄂北区块的薄互层进行了有效而可靠的划分和精细追踪,并展示出砂体的分布特征和砂体厚度变化特征。在这种高分辨率反演剖面上可拾取出最小厚度为4.0m的砂体,最小误差为2.3%。在鄂北区块的应用表明,地震高分辨率非线性反演方法及其反演剖面对详细研究薄互层具有独特的功效和作用。

The authors applies seismic high resolution nonlinear inversion method to the seismic data of Ebei region with narrow wave band, low master frequency and message-to-noise ratio to obtain high quality and high resolution seismic inversion profile (velocity profile). They use this high resolution inversion profile on thin and interbedded reservoir of Ebei region to make effective and reliable division and precise correlation, and show the sandbody distribution character and thickness change character. On this high resolution inversion profile, the minimum thickness 4.0 meters sandbody can be taken, and its minimum error is 2.3%. The application to Ebei region shows that seismic high resolution nonlinear inversion method and its inversion profile have especial efficiency and function in researching the thin and interbedded reservoir in detail.