| 广义相遇法的拓展 |
| |
| 引用本文： | 高磊,潘树林,周熙襄,钟本善.广义相遇法的拓展[J].物探化探计算技术,2007,29(4):300-302. |
| |
| 作者姓名： | 高磊 潘树林 周熙襄 钟本善 |
| |
| 作者单位： | 成都理工大学,信息工程学院,四川,成都,610059 |
| |
| 摘 要： | 当地表不规则时,用广义相遇法求取的折射层速度存在较大误差,针对于此,这里提出了一种基于广义相遇法的广义相遇静校圆滑法。其步骤如下:①利用广义相遇法求出针对不同XY值的广义相遇速度解析值和时间深度值;②根据时间深度值求出"静校正量",然后从旅行时间中减去静校正量;③绘出广义相遇速度解析曲线,求出速度。其中的步骤②,是把所求的静校正量从旅行时间中减去,就是把地表的影响消除,所以得到的值基本不受地表的影响。对某一模型用此方法,取得了比较理想的效果,尤其是对于地表比较小范围的突然变化,有很明显的效果。实践证明,该方法极大地提高了传统广义相遇法求取折射层波速的精度。
|
| 关 键 词： | 广义相遇法 折射 偏移 圆滑 |
| 文章编号： | 1001-1749（2007）04-0300-03 |
| 修稿时间： | 2005-12-06 |
THE EXPANDING OF GRM |
| |
| GAO Lei,PAN Shu-lin,ZHOU Xi-xiang,et al..THE EXPANDING OF GRM[J].Computing Techniques For Geophysical and Geochemical Exploration,2007,29(4):300-302. |
| |
| Authors: | GAO Lei PAN Shu-lin ZHOU Xi-xiang |
| |
| Abstract: | When the near-surface environment of the Earth is irregular, the seismic velocities of refraction have huge deviations. So that an expanding method of GRM is proposed.The time-depth data reflect the influence of not only surface irregularities, but also refractor irregularities, while the time-depth data using different XY values reflect the different degree of the influence of the surface and refractor. This expanding method just uses this considerarion to compute the influence of the surface, subtract the influence of the surface from the travel times and compute the velocities of refractor. The velocities otaimed using this method are uninfluenced by the surface irregularities. The method is proved to be able to enhance the precision of seismic velocities in refractors. |
| |
| Keywords: | GRM refractor offset smoothing |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
