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静校正评价是复杂地表区地震资料处理的一项重要工作。提出了从建模技术适应性、建模过程的质量控制、实际资料应用效果3个方面评价静校正量的思路。利用地质地貌、小折射与微测井等资料以及大炮初至特征等,建立对近地表特征的认识,判断建模技术的适应性。建模过程严格的质量控制是建立可靠近地表模型的重要保证。静校正量应用效果可以判断高频分量的精度以及幅度较大的中频分量误差。给出了复杂地表区建模技术适应性分析实例,分析了工区近地表特征,结果表明工区西部的部分区域近地表结构特别复杂,仅靠很少几口微测井资料约束下的初至层析技术很难得到较高精度的静校正量。
Static correction is an important task in the seismic data processing of complex surface areas. The idea of evaluating static correction from three aspects: the adaptability of modeling technology, the quality control of modeling process and the application effect of actual data is put forward. Using the geology and geomorphology, small refraction and micro-logging data, as well as the first arrival of cannon, we establish the knowledge of near-surface features and judge the adaptability of modeling techniques. Strict quality control of the modeling process is an important guarantee for the establishment of a near-surface model. Static correction effect of the application of high-frequency components to determine the accuracy and magnitude of the larger intermediate frequency component error. The adaptive analysis of complex surface modeling techniques is given. The near surface features of the work area are analyzed. The results show that the near-surface structures of some areas in the western part of the work area are particularly complicated. Only the first arrivals under the constraints of a few micro- Analysis of technology is difficult to get more accurate static correction.