【摘要】 中国西部部分地区地层落差大,地层倾角陡,断崖断坎较多、地表条件复杂多样,给三维地震资料的采集和处理工作带来了很大的难度,同时也给构造和沉积储层研究工作带来了很多不确定因素。针对该类地层三维地震资料处理的难点和重点问题,采用静校正、叠前多域去噪、叠前时间偏移、相对保幅处理、相位一体化处理和精细速度分析等三维地震资料处理技术,结合区域地质特征研究成果,对我国西部盆地部分地区三维地震资料进行了重复处理。新、旧处理结果相比,其浅层信噪比有所提高,频带拓宽,偏移归位准确可靠,解决了以前的欠偏移问题,使地层接触关系更清楚,从而为三维地震精细解释、构造特征分析等研究工作奠定了坚实的基础。更多还原

【Abstract】 The topographical conditions were complex in the west China,such as high and steep formation,various fault scarps and fault slopes and complex surface conditions,which caused difficulty for 3Dseismic data collection and processing,also of many uncertain factors were induced for structural and depositional reservoir study.In consideration of the difficulties and key problems of 3Dseismic data processing in the formation,3Dseismic data processing technology,such as statics correction,pre-stack multi-domain noise suppression,pre-stack time migration,amplitude preserved processing,phase position close-coupled processing and fine velocity analysis were deployed,in combination with the research results of area geological study;the 3Dseismic data in part of western basins of China were reprocessed.The result of former data process is integrated with that of new process,the signal-noise ratio in shallow formation is improved,frequency range is broadened,migration become more accurate and reliable,the problem of under migration is solved,the formation contact relationship becomes clearer.Thus it provides a reliable basis for 3Dseismic data interpretation and the study of structural features.更多还原