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三维地震资料叠后提高信噪比和横测线方向道内插问题，目前在生产中还没有得到很好的解决。现在有些数据中心是用二维多项式拟合提高信噪比模块对纵测线和横测线分两步进行处理的。本文应用多项式拟合理论直接在三维叠后地震资料上完成提高信噪比和横测线方向的道内插（通常横测线方向的道间距要比纵测线方向的道间距大一倍，需要进行道内插），用一步处理即可得到能应用于三维偏移的共深度点数据集。此法充分利用了三维地震资料的信息，提高了处理效率。
After three-dimensional seismic data are stacked to improve the signal-to-noise ratio and transverse line direction interpolation, the problem has not been well solved in production. Some data centers now use two-dimensional polynomial fitting to improve the signal-to-noise ratio module for in-line and cross-line processing in two steps. In this paper, the polynomial fitting theory is used to directly improve the SIR interpolation and cross-line interpolation in the 3D post-stack seismic data (usually the cross-track spacing in the horizontal direction is two times larger than the vertical alignment spacing) To do the interpolation of the road), a total depth point data set that can be applied to the three-dimensional offset can be obtained by one-step processing. This method takes full advantage of the information of 3D seismic data and improves the processing efficiency.