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阿尔及利亚guerara区块地表地表条件复杂,低降速带速度、厚度在平面上变化较大,静校正问题严重。针对这一问题,在该区块开展了静校正方法研究。通过对高程、模型、折射和层析反演静校正的适用条件及优缺点的分析,结合工区地震资料的实际情况及各种静校正方法的对比处理效果,认为层析反演静校正方法能较好地解决该区的静校正问题,应用初至波整形技术,能大大提高层析反演静校正的计算精度,提高低幅度构造的可靠性。
The ground surface conditions in the Guerara block in Algeria are complex. The velocities and thickness of low-speed deceleration zones vary greatly in the plane and the problem of static correction is serious. In response to this problem, a static correction method was developed in this block. Based on the analysis of the applicable conditions, advantages and disadvantages of static correction of elevations, models, refraction and tomographic inversion, combined with the actual situation of seismic data in the work area and the comparison and processing effect of various static correction methods, it is considered that the static correction method of tomographic inversion The static correction problem in this area can be solved well. By applying the first arrival wave shaping technique, the accuracy of the static correction of the tomographic inversion can be greatly improved, and the reliability of the low amplitude structure can be improved.