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由于鄂尔多斯黄土塬探区的地貌特点和表层复杂的地震地质条件,地震资料存在很严重的静校正问题;层析反演静校正和剩余静校正基本解决了短波长静校正,但仍有部分长波长静校正未解决,因此,识别和解决残留的长波长静校正问题,恢复地层真实形态是地震资料处理的重点内容之一.本文系统地总结了长波长静校正常用方法的三种思路及其适用限制,在分析长波长静校正成因的基础上,详细给出了五种长波长静校正问题的识别方法:水平叠加剖面法、共炮检距剖面法、分偏移距叠加法、地形相关法、交会图法,并对这些方法的应用效果及其适用条件进行分析研究,最后提出采用测井实钻深度约束的井控静校正方法消除剩余长波长静校正量.应用表明,识别方法可以准确地辨别长波长静校正问题,而且井控静校正能有效解决鄂尔多斯黄土塬长波长静校正问题,效果显著,为长波长静校正研究提供了借鉴和启示.
Due to the geomorphic features of the exploration area on the loess plateau in the Ordos Plateau and the complicated seismic and geological conditions on the surface, the seismic data have serious static correction problems. The static correction of the tomographic inversion and the residual static correction basically solve the short wavelength static correction, but some of them are still long Therefore, it is one of the key issues in seismic data processing to recognize and solve the long-wavelength static correction problem and restore the true shape of the stratum.This paper systematically summarizes three kinds of train of thought of the long wavelength static correction method and their Based on the analysis of the causes of long wavelength static correction, five identification methods of long wavelength static correction are given in detail: horizontal stacking section method, common collimator sectioning method, sub-offset superposition method, topographic correlation Law and intersection plans, and analyze the application effects and the applicable conditions of these methods. Finally, a well-control static correction method based on logging depth drilling is proposed to eliminate the remaining long wavelength static correction. The application shows that the identification method can Accurately identify long-wavelength static correction problem, and well-controlled static correction can effectively solve the problem of long wavelength static correction Loess Plateau, the effect was significant It provides a reference and revelation for the study of long wavelength static correction.