利用时空校正方法做山区地震勘探静校正  

Static correction in mountainous area using space-time correction method

作　　者：王辉[1] 刘天放[2] 

机构地区：[1]中国地震局地球物理所,北京100081 [2]中国矿业大学资源地球科学学院,江苏徐州221008

出　　处：《煤田地质与勘探》2006年第6期69-73,共5页Coal Geology & Exploration

摘　　要：在山区地震勘探中,由于地表高差起伏剧烈,不仅对地震波旅行时造成很大影响,而且导致水平叠加时共反射点与共中心点产生较大偏差,影响了叠加精度。为解决这一问题,提出了时空校正的方法。它是根据几何地震学的基本原理,将炮点和检波点的位置沿射线路径校正到基准面上地震波入射和出射的位置,以去除地表起伏引起的反射点与共中心点的偏差,并对基准面以上的射线路径进行地震波旅行时间校正。处理效果表明,该方法为解决山区地震勘探的静校正问题提供了一种新的思路。In seismic exploration of mountainous areas, the severely rugged terrain not only influences the traveling time of seismic wave seriously, but also results in big offsets between Common-Reflection- Points and Common-Mid-Points in horizontal stacking, which does great harm to stacking accuracy. To solve this problem, a new static correction method named space-time correction is developed, which is based on the principle of geometric seismology. It deduces the propagation path of seismic wave in subsurface layers. Applies space correction to sources and receivers to the elevation datum and then takes the Common-Mid-Point gathers. After that, applies time correction to the seismic waves along its ray path. By field seismic data processing and comparison with other static correction methods, it shows a good effect and provides a new method of static correction for seismic data processing in moantamous areas.

关 键 词：时空校正 静校正 山区地震勘探 

分 类 号：P631.44[天文地球—地质矿产勘探]