松辽盆地三维地震资料连片处理关键技术及其应用效果分析

Key technologies of 3D seismic data multi-survey joint processing and its application effect analysis in Songliao Basin

针对三维地震资料连片处理中的区块间能量不均、子波差异、空面元等突出问题,提出采用基于覆盖次数的能量优化调整技术、时差计算和调整技术、地表一致性预测反褶积加剩余静校正技术以及叠后插值、叠后时间偏移技术等,来确保区块间振幅能量分布和子波特征分布均匀,无闭合差存在。结果表明,采用这些技术在深、浅层均能得到较好的处理效果,偏移剖面无空间假频存在,且信噪比得到提高。

To solve the general problems such as uneven energy,inconsistent wavelet and empty binning of the 3D seismic data among the multi-survey joint processing blocks,methods of energy optimized adjustment method based on fold coverage,cross correlation time shift computation and adjustment method among the blocks,residual static method after surface consistent predictive deconvolution and post-stack time migration after post-stack interpolation were applied to ensure the consistence of amplitude energy and wavelet characteristics among the blocks with no joint time shift.The result shows that the proposed key technologies can obviously improve the processing quality in both shallow and deep parts,and there is no spatial spurious frequency of the migration section with high signal to noise ratio.