塔北地区地表低速带模型数据库

Model Database of Low-Velocity Layer in Surface of Tabei Area,Tarim Basin

在二维地震资料处理工作中,控制静校正参数的闭合差可以改善地震剖面的闭合差。通过建立全塔里木盆地北部探区的地表低速带数据库,对二、三维低速带数据进行整理,搜索和剔除奇异值,然后输入数据库,建立稳定的、可重复使用的近地表低速带模型,再采用统一的计算模式进行平滑、内插,导出生成网格化的低速带数据,为资料处理快速提供可靠的低速带数据,既可以缩短处理周期,也可改善剖面的闭合差。

In2-D seismic data processing,to control the discrepancy in closing of static correction parameters tends to improve the discrepancy in closing of seismic profile.Through establishing a database of surface low-velocity layer of Tabei area in Tarim basin,coordinating data from2-D and3-D low-velocity layer,searching and eliminating singular values,and then inputting them into the database,this paper develops a model of surface low-velocity layer that can be used steadily and repeatedly,by which obtains the gridding low-velocity layer data generated after smoothing and interpolation using uniform calculation method.Using such a model database can not only shorten the data processing cycle,but also improve the discrepancy in closing of seismic profile fleetly and reliably.