非一致性时移地震资料叠前互约束处理技术

MUTUAL CONSTRAINT PROCESSING TECHNOLOGY FOR INCONSISTENCY TIME-LAPSE SEISMIC DATA

时差、相位、频率、振幅、能量差异是影响时移地震处理的主要因素,对于非一致性时移地震资料的处理,消除两期资料在这四个方面的差异是处理工作的关键。笔者首先分析了永新三维两期资料的施工参数差异,在此基础上,利用面元对应抽稀法消除了野外采集观测系统差异;利用有针对性的去噪技术和能量补偿方法,消除了两期资料能量信噪比差异;利用频率相位校正技术,消除了两期资料频率、相位差异。通过这四个方面的互约束处理,取得了较好的处理效果,达到了时移地震资料的处理要求,为后续的时移地震属性分析工作奠定了基础。

Time,frequency,amplitude and phase differences constitute the main factors affecting the time-lapse seismic processing,and elimination of the differences in these four aspects is the key to the unrepeated seismic data processing.The authors analyzed the differences of the construction parameters in two 3D data sets of Yongxin,used the binary corresponding evacuating method to eliminate the differences of field acquisition geometry,eliminated the energy signal-to-noise ratio differences between two data sets by targeted de-noising technology and energy compensation methods,and used the frequency and phase correction technique to eliminate frequency and phase differences.Based on the four aspects of the mutual constraint processing,the study achieved good results and attained the seismic data processing requirements,thus laying a foundation for subsequent seismic attribute analysis.