地震层速度模型编辑系统应用研究

Application of seismic layer velocity model editing system

地层层速度能够反映地下岩性分布和地质构造,其速度的准确性关系着地震成像的质量,在剩余速度分析拾取的速度谱上进行沿层速度修正,有利于提高速度精度。这里通过分析地震速度值属性,采用图像学方法,绘制速度模型图像,开发图像交互功能时时浏览速度值,还可利用速度矩形分布图快速定位速度异常值,选出异常值区域后清除区域速度值,选择合适的插值方法对区域内速度重新插值,提供了方便快捷编辑速度值,更新速度模型的功能。

Stratum velocity reflects underground lithology distribution and geological structure.The accuracy of stratum velocity is related to the quality of seismic imaging.The velocity spectrum picked up by residual velocity analysis can be adjusted along stratum velocity,which is helpful for improving the velocity accuracy.This system draws speed model image and browses speed value through computer visualization technology and image method.It uses speed rectangular distribution map to locate speed abnormal value quickly and chooses abnormal value area and clears area velocity value.Meanwhile,it chooses appropriate interpolation method to re-interpolate speed in area and realizes editing speed.This study can provide value,update velocity model,lay the foundation for improving migration imaging effect.