浅谈束状三维地震勘探观测系统

本文根据BPX滩海地区三维地震勘探实例,从采集、处理两方面探讨了三维采集施工方法及参数选择,通过分析阐明了在地震地质条件复杂地区,采用三维地震相对窄方位角排列片要优于宽方位排列片。笔者认为,目前全三维处理技术尚不能满足全三维采集的要求,而其中三参量速度分析是技术的关键。

DISCUSSION ABOUT 3D SWATH SEISMIC SHOOTING

Taking 3D seismic survey m BPX beach area as an example, field operation ot 3D acquisition and its parameters selection are discussed in the both acquisition and procession aspects. Analyzing the processed seismic data shows that in complex seismo-geological conditions, 3D seismic data from swath geometric with small azimuth angle are better than seismic data obtained with wide azimuth angle. At present, the true 3D processing technique does not meet the requirement of 3D acquired data, of which the three-parameter velocity analysis is the key of technique.