【摘要】 准噶尔盆地南缘地形复杂,低降速带变化大,地下构造高陡,断裂发育,波场极其复杂,地震成像困难,制约了南缘油气勘探的进程。近几年随着物探技术的进步和对复杂地震勘探攻关力度的加大,地震成像品质有了明显的提高。改进地震资料采集技术,改善观测方式,优化采集参数,得到了高陡构造的反射信息;物探成像新技术的发展,采集、处理、解释一体化工作模式的建立以及定量化的过程质量控制,建立了更为准确的近地表模型。基于断层相关褶皱的构造建模指导偏移速度场的建立,利用声波测井、VSP速度资料的综合标定,使原本难以成像的断褶带、掩伏带构造地震波场聚焦,得到良好的成像效果。更多还原

【Abstract】 The southern margin of Junggar basin is characterized by complex terrain,big change of low velocity zone,high and steep underground structure,developed faults,extremely complex wave field,difficult seismic imaging,so its petroleum exploration process is restricted due to these factors.In recent years with the progress of the geophysical exploration technique and the intensifying complex seismic exploration research efforts,the seismic imaging quality has been significantly improved than ever before.This paper discusses the key technologies for effect of seismic profile that has made great progress in two main aspects: the field seismic data acquisition technology research,through the argument of observation way and the optimization of collecting parameters,reflection information of high and steep structure information has been gained;the development of new technology for geophysical prospecting imaging,such as data acquisition,processing interpretation work model building and the quantitative quality control in the process,can build a more accurate the near surface model,reduce the time difference between the seismic traces.Based on fault fold structural modeling to guide the establishment of migration velocity field and using acoustic logging,VSP velocity data comprehensive calibration,which can make difficult imaging fault fold zone and hidden zone to be focused on structural seismic wave field,thus geting good imaging effect.更多还原