摘要
地震资料处理经常需要进行不同采集参数数据间的融合处理,其中子波一致性处理对改善成像质量、提高空间分辨率至关重要。利用静校正技术消除数据时差差异后,利用GeoEast系统的特色处理模块,可以建立针对不同采集条件下数据的子波一致性处理流程。首先,在保真去噪的基础上,利用振幅处理模块完成能量一致性处理,特别是利用分频振幅补偿技术改善近地表造成的高频能量衰减问题;然后,通过地表一致性反褶积处理消除近地表子波鸣震反射;最后,基于重叠区数据的特征差异设计整形因子,进一步消除激发子波差异。实际资料处理结果证明,经过融合一致性处理后,资料整体信噪比和分辨率都有所提高,不同震源子波类型趋于一致,空间子波的频率和相位特征均一致,利用标准反射层的沿层属性验证了子波的频率、相位的一致性。
In seismic data processing,it often needs to process emerging data of different acquisition parameters,among which wavelet consistency processing plays a vital role in improving imaging quality and spatial resolution.After using static correction technology to eliminate the time difference of data,we employ the characteristic processing modules of the GeoEast system to establish the technical flow of wavelet consistency processing for data acquired under different conditions.On the basis of fidelity denoising,firstly,the amplitude processing module is used to complete the energy consistency processing,especially the use of the frequency-division amplitude compensation technology for improvement in the high-frequency energy absorption problem caused by near surface.Then,through surface-consistent deconvolution,the near-surface reverberation and reflection of wavelets are eliminated.Finally,a shaping factor is designed on the basis of the characteristic difference in the overlapping data of different areas to further eliminate the difference in excitation wavelets.The actual data processing results show that after the emerging consistency processing,the overall signal-to-noise ratio and resolution of the data are improved.The source wavelets of different types tend to be consistent,and the frequency and phase characteristics of spatial wavelets are consistent.The frequency and phase consistency of wavelets is verified by the along-layer attribute of the standard reflection layer.
作者
张春燕
李亚旭
王晓琳
侯山红
ZHANG Chunyan;LI Yaxu;WANG Xiaolin;HOU Shanhong(PetroChina Hangzhou Institute of Geology,Hangzhou,Zhejiang 310023,China;Research Institute of Geology of CNPC Logging,Xi’an,Shaanxi 710000,China;Geophysical Prospecting Research Institute,Jilin Oilfield Company,PetroChina,Songyuan,Jilin 138000,China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2022年第S02期29-34,224-225,共8页
Oil Geophysical Prospecting
基金
国家自然科学基金项目“面向海洋深水资料的全波场最小二乘偏移方法研究”(41874164)资助
关键词
子波一致性
融合处理
子波差异
相位特征
wavelet consistency
emerging processing
wavelet difference
phase feature
