全方位表层结构调查方法在松南长岭凹陷腰英台工区的应用

Application of comprehensive near surface investigation method in YYT 3D seismic survey area

表层结构调查实际上就是对工区的表层速度和岩性等进行测定的一种方法 ,是地震采集前必须要做的工作 ,目前主要是为静校正服务。随着地震勘探程度的不断深入 ,勘探区块越来越复杂 ,获取高品质地震资料难度在不断增加 ,因此 ,对表层结构调查提出了更高的要求。在松南长岭凹陷腰英台南三维工区 ,应用全方位表层结构调查方法 ,为地震施工前的地震试验和事前井位设计提供了较为可靠的基础资料 ,为该区取得高品质的地震资料提供了有效的保障。

Comprehensive near surface investigation is actually a composite way to determine the distribution of near surface velocity and lithology.Near surface investigation mainly serves for static correction in seismic data processing. With development of seismic exploration, the survey areas are getting more and more complicated, the difficulties in getting high-quality data are becoming greater than ever as well, and therefore the demands for accurate near surface data are increased. In YYT survey area in Changling depression of Songliao basin, we used comprehensive near surface investigation method to obtain reliable near surface information. Satisfactory results have been achieved.