摘要
首次提出了用于解决塔里木盆地地震资料数据处理中浅部地震速度分析的折射层析成象方法。该方法可以通过求解任意变速介质中的二维程函方程、射线追踪和ＳＩＲＴ迭代解法实现。通过对塔里木盆地地震资料的层析反演取得了较好的结果，揭示了浅部地震速度具有较大的横向变化。这一变化对建立地下速度模型及反射构造成象有较大影响，钻井资料证实了这一结果。这项研究的成功对研究塔里木盆地地震波速度的变化规律及进一步提高该区整体地震资料处理与解释的质量具有重要的实际意义。
A refraction seismic tomographic method is proposed for the first time to determine the distribution of seismic velocity in shallow levels in Talimu Basin. The method can be implemented by the solution of 2D eikonal equation with any velocity variations, raytracing and an iterative algorithm-SIRT. The tomographic inversion of seismic data is better shown in the Talimu Basin and it revealed obvious lateral velocity variation in shallow levels. The variation of seismic velocity in shallow levels has important influence on velocity modelling and reflection imaging, which is confirmed by borehole data. The achievement is of great significance for us to find out the law of seismic velocity changes and to improve the quality of seismic data processing and interpretation in Talimu Basin.
出处
《长春科技大学学报》
CSCD
1998年第1期85-88,共4页
Journal of Changchun University of Science and Technology
