辫状河流相薄砂体地震子波效应和识别方法

Wavelet effect and recognition methods of thin sand bodies in braided river facies

黄军斌 高利军 高勇 王德发

HUANG Jun-Bin GAO Li-Jun GAO Yong WANG De-Fa-

在地震资料频率一定的情况下，地震子波旁瓣效应会增加薄砂岩识别和解释的难度。为了研究子波旁瓣的影响程度，设计系列正演模型，利用不同频率的零相位雷克子波合成人工地震剖面，确定砂体位置、频率与地震子波旁瓣效应的关系，研究振幅类属性与薄砂体描述的关系。结果表明，综合利用多频带地震剖面和振幅类属性，可以可靠地解释和描述厚度大于1/8波长的辫状河流相薄砂岩储层。

Under a fixed seismic frequency，wavelet side lobes may increase the difficulty of interpreting and recognizing thin sand bodies. To investigate the impacts of wavelet side lobe effects，we design a series of forward models and produce synthetic seismic profiles using zero phase Ricker wavelets of different frequencies. The purpose is to identify the relationship of sand body location and frequency with side lobe effects. This study also aims at exploring the relationship between amplitude attributes and the description of thin sand bodies. The results show that，an integrated use of multiˉfrequency profile and amplitude attributes can reliably interpret and describe thin sand bodies of braided river facies which are thicker than1/8wavelength.

10.11743/ogg20100214