【摘要】 如果把一个共中心点道集内折射层的速度近似为常数，顶面近似为 平滑斜面，那么，折射 旅行时与偏移距满足直线方程。直线的斜率为折射层速度的倒数，截距为共中心点的时间深度，据此提出了共中心点域折射波解释方法。模型试验表明，该方法简单、不需要约束条件 、计算快速、解稳定、适应性强。运用该方法确定了我国西部某油气勘探区的近地表模型， 较好地解决了该区的长波长静校正问题。更多还原

【Abstract】 If refractor velocity on a CMP gat her can approximately be considered as const ant and top surface as smooth oblique plane, refraction travel time and of fset are satisfied with linear equation: slop of the line represents reciprocal of refractor velocity and intercept is time depth at the CMP, and a refraction seismic interpretation method in CMP domain is presented on that basis. A mode l test shows that the method is simple, don’t need constraint conditions and ha s advantages of fast computation, stable solution and better adaptability. App lication of the method to determine near surface model for an oil gas explorat io n area in the west of China can better solve the problem of long wavelength stat ic correction in the region.更多还原