宽方位三维处理过程几个技术问题探讨

Study on Several Technical Issues on Three Dimensional Processing of Broad Azimuth

随着地震勘探技术的发展,地震采集道数已从原来的几百道发展到了几千道,甚至上万道。由于采集道数的增加,陆上宽方位角三维地震勘探已经成为可能。通过对吐哈盆地胜北宽方位三维处理方法研究,在比较宽、窄方位角三维地震静校正、叠前去噪、多方位角速度分析、偏移成像处理效果后,认为宽方位角三维地震勘探在岩性和方向性裂缝勘探领域具有广阔的应用前景。

With the development of seismic survey technique, the numbers of seismic acquisition trace have increased from original several hundreds to several thousands, even up to ten thousands. Because of the increment of acquisition trace numbers, three dimensional seismic survey of broad azimuth on the land becomes available. Through the study on three dimensional processing method of wide azimuth of Shengbei in Tuha basin, after comparing the result of three dimensional seismic static correction of wide, narrow azimuth angle, reduction of pre-stack interferential noise, multi-azimuth angle velocity analysis and processing result of pre-stack migration imaging, it is thought that the application prospect of three dimensional seismic survey of wide azimuth angle in the survey area of lithological and directional fracture is extensive.