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针对复杂探区因模型道品质差导致反射波剩余静校正效果不好的难题,本文提出了一种基于样条曲线拟合的二维初至波剩余静校正方法.该方法相对直线拟合法,可以用的初至信息更多,统计的短波长静校正量更为准确;相对折线拟合法,它不用拾取折射拐点,操作方便快捷,更具有可操作性.它采用三次样条函数将应用了长波长静校正量的初至拟合成一条光滑曲线,根据地表一致性原则将延迟时分解为炮点、检波点短波长静校正量.实际资料应用结果表明,基于样条曲线拟合的单炮初至变得光滑,叠加剖面同相轴连续性得到增强,可为反射波剩余静校正提供较好品质的模型道,对低信噪比资料剩余静校正问题的解决具有实际意义.
In order to solve the problem that the residual static correction of reflected wave is not good due to poor quality of the model channel in complex exploration area, a two-dimensional first-rest residual static correction method based on spline curve fitting is proposed in this paper. It can be used more first-arrival information, statistical short-wavelength static correction more accurate; Relative fold line fitting method, it does not have to pick refraction inflection point, easy to operate, more operational. It uses the cubic spline function will be applied According to the principle of surface consistency, the delay time can be decomposed into the short-wavelength static correction of shot-point and detection point.The practical data shows that the single-curve fitting based on spline curve The initial smoothing of the cannon and the enhancement of the continuity of the superimposed section in the cross section can provide a better quality model for the residual static correction of the reflected wave, which is of practical significance for solving the residual statics problem of low signal-to-noise ratio data.