喇嘛甸3D3C地震数据重新定位及定向分析

Re-location and re-orientation techniques for 3C3D seismic data of Lamadian survey

三维三分量(3D3C)地震资料处理对采集过程中检波器布设参数的一致性有严格要求,采集设计与实际施工之间的差异会影响到后续资料处理的效果。基于喇嘛甸工区100km2三维三分量地震数据,本文从炮/检点位置偏离、水平分量极性、三分量检波器与地面的倾角、水平分量的方位角一致性四个方面分析了影响三分量地震资料品质的因素,并基于数据本身研究出针对各种因素的检查与校正技术。实际资料处理结果表明:该项研究弥补了喇嘛甸三维三分量地震数据野外采集过程中存在的缺陷,使三维三分量地震资料满足处理要求。

The 3C3D data processing requires sensor parameter consistency,namely consistency of 3C sensor placement.But there are always some differences between design parameter and practice in field that would have induced strong impacts on 3C3D seismic data imaging.Based on the 3C3D data(100km2) of Lamadian survey,4 aspects that influence data imaging quality have been analyzed in this paper,including shot and receiver location deviation,polarity reversal of horizontal components,3C sensor tilt,azimuth distribution of horizontal components.In this work,we develop a few techniques to check and correct above 4 issues.Our processing result shows that these techniques amend the inaccuracy of real data to meet the requirement of 3C3D data processing.