无井多道反演  

Multi-trace inversion without borehole data

作　　者：林小竹[1] 杨慧珠[1] 汤磊[2] 

机构地区：[1]清华大学工程力学系 [2]石油勘探开发科学研究院

出　　处：《石油地球物理勘探》1998年第4期448-452,共5页Oil Geophysical Prospecting

摘　　要：在深入研究波阻抗反演技术的基础上，针对其单道计算的特点，提出了一种简单易行的多道反演方法。该方法具体的实现步骤是：①采用频域归一化滤波算子将中、低频分量相加，形成无井多道反演的初始模型；②采用常规最小平方法提取最小相位反子波，求出子波，然后转换成零相位子波；③对数据拟合差剖面进行信噪分离或做压制噪声处理。应用结果表明，本文方法明显优于单道反演方法。After detailedly analysing the common wave impedance inversion methodswhich take single trace computation, we developed an easy multi-trace inversionmethod. It consists of following steps:. Combine the mid-frequency component with low-frequency component, byusing normalized filtering operator in frequency domain, to form an initial model formulti-trace inversion without borehole data.. Obtain the minimum-phase inverse wavelet, by taking ordinary least squaremethod, to get wavelet, which is then converted into zero phase wavelet.. Separate off signals and noises (or suppress noises ) of fitted data differencesection. Application effect shows that this method is much better than usual single-trace inversion methods.

关 键 词：地震反演 波阻抗 宽带约束反演 地震勘探 

分 类 号：P631.443[天文地球—地质矿产勘探] P631[天文地球—地质学]