塔里木盆地速度场的建立及应用

Determination of velocity field in the Tarim basin and its application

塔里木盆地具有特殊的地震地质特征。建立该区高质量的速度场是一项庞大的系统工程。本文系统地给出了塔里木盆地速度场建立的基本流程及软件实现的主要过程。在研究过程中，以落实埋深5000m左右，幅度20～30m左右的有利构造圈闭为目标，探讨塔里木盆地速度场的建立方法及提高局部精细构造解释应用效果的措施。速度场的建立，为塔里木盆地大范围的速度研究、构造成图及地质、地球物理区域性研究提供了一种有效手段。

The Tarim basin has special geological and seismic characteristics. Determiningan accurate velocity field in the basin is a very huge project. The paper describes theprocedures of both velocity field determination and software implementation. Basedupon ascertaining some favourable structural traps at 5 000 m deep whose closuresare 20~30m,we researched into both the method to determine velocity field and themeasures to improve the application effect in detailed interpretation of structuraltraps. The velocity field plays an important role in wide velocity analysis,structuremapping,geologic and geophysical researches in the basin.