层析静校正在楚雄盆地探区的应用

Tomographic Static Correction in Chuxiong Basin Exploration Area of Application

楚雄盆地地表高程变化剧烈,地表条件变化明显,工区地形起伏变化很大,静校正问题异常严重。层析静校正是一种非线性模型反演技术,它利用地震初至波的走时和射线路径反演介质速度场。这项技术不受地表及近地表结构纵横向变化的约束,使用的是地震初至波的到达时间,得到的结果是地下不同深度的速度值,更加符合低速带速度并非严格成层的实际情况。本文将层析静校正与野外静校正和折射静校正的应用效果进行了对比分析,总结了层析静校正方法在楚雄盆地探区攻关处理中的应用。

AhstractChuxiong Basin surface elevation change severely, surface condition changes obviously, terrain conditions vary greatly, static correction problem is unusually severe. Tomographic static correction is a nonlinear model inversion technique, it makes use of seismic first-arrival wave traveltime and ray path inverting velocity field . This technique is not affected by the surface and near surface structure change in vertical and horizontal constraint,using the seismic first-arrival wave arrival time. The results obtained are different underground depth velocity value and more coincident with the factual data.In this paper, compared the effects of application of analysis of tomographic static correction and field static correction and refraction statics. Tomographic static correction methods are summarized in the the Chuxiong Basin exploration area research processing applications.