Approximate computation of the acoustic impedance from seismic data
Approximate computation of the acoustic impedance from seismic data
复制标题
DOI：
10.1190/1.1441415
复制
发表时间：
1983-10
期刊：
影响因子：
3.3
通讯作者：
K. Berteussen;B. Ursin
中科院分区：
文献类型：
--
作者：
K. Berteussen;B. Ursin
地震数据声阻抗的近似计算通常基于递归公式 h 1 + Ck ktl = ‘k G 地震脉冲乘以顶层阻抗的两倍。对于绝对值小于 0.2 的阻抗值，这也等于与地震脉冲卷积的声阻抗函数（减去顶层的声阻抗）。其中h是第k层的声阻抗，ck是第k层和k+1层之间界面的压力反射系数。上式是从离散层状地球模型推导出来的。当我们考虑连续地球模型并对结果进行离散化时，我们得到了递归公式： 从带限地震数据计算声阻抗对应于集成地震道的指数变换。在具有良好分离的反射器和低噪声水平的带限声阻抗部分上，可以正确地识别声阻抗变化的方向。
The approximate computation of the acoustic impedance from seismic data is usually based on the recursive formula h 1 + Ck ktl = ‘k Gtegrated seismic pulse multiplied with twice the impedance in the top layer. For impedance values less than 0.2 in absolute value this is also equal to the acoustic impedance function (minus the acoustic impedance in the top layer) convolved with the seismic pulse. where h, is the acoustic impedance in layer number k and ck is the pressure reflection coefficient for the interface between layer k and k + 1. The above formula is derived from a discrete layered earth model. When we consider a continuous earth model and discretize the results, we obtain the recursive formula The computation of the acoustic impedance from band-limited seismic data corresponds to an exponential transformation of the integrated seismic trace. On a band-limited acoustic impedance section with well-separated reflectors and low noise level the direction of change in the acoustic impedance can be correctly identified.