摘要
VSP法是一种井中地震观测方法,但VSP克希霍夫积分偏移时存在明显的画弧现象和虚反射现象。对VSP克希霍夫积分偏移过程进行研究,改进倾角滤波器,提出了一种新的VSP最大倾角滤波器顶点的选取方式,并将其与传统的最大倾角滤波方法成像效果进行对比。结果表明,改进的方法改善了不同倾角和不同成像深度的限制,成像效果更好。该研究成果不仅可以应用于井地地震,更可用于TSP、TRT资料处理和起伏地表条件地面地震反射的资料处理。
VSP method is a borehole seismic observation method. But VSP Kirchhoff migration method has a shortcoming of obvious arc phenomenon, as well as virtual reflection phenomena. This paper conducts a research on the process of the VSP Kirchhoff migration and the improvement of the dip filter, and proposes a new method of selecting the vertex of the VSP maximum dip filter. Compared with the imaging effect of the traditional maximum dip filter method, this method improves the limitations of different dip angles and different imaging depth, which verifies the effectiveness of this method. The research results can be used not only in well-to-ground seism, but also in the data processing of TSP, TRT and surface seismic reflection under undulating surface conditions.
作者
刘振明
Liu Zhenming(China Railway Design Corporation,Tianjin 300251,China)
出处
《工程地球物理学报》
2019年第5期559-563,共5页
Chinese Journal of Engineering Geophysics
基金
中国铁路设计集团有限公司科技开发课题项目(编号:721867)
