Abstract:Lithologic oil/gas exploration has become an important compositional part of current oil/gas exploration, so that detecting the high-frequency information of seismic data has been an important studied subject.The paper deeply discussed some issues of resolution, frequency-divided processed seismic data and inversion of wave impedance and acquired following knowledge: (1) it should increase the frequency of field-acquired seismic data if want to improve the vertical and lateral resolution; (2) seismic frequency-divided processing is one of common-used methods for improving post-migration resolution, it should be within the useful band of seismic wave for the method and may bring a lot of false images if beyond the useful band;(3)the high-frequency reflection coefficients on the low-frequency synthetic seismograms exist uncertainty, in model-based impedance inversion, the initial model has great influence on inverted results,the former is built on logging data,so that the closer to the reality for the initial model,the better of inverted re-sults, otherwise, the phenomenon of modeling will be appeared;(4)cokriging interpolation by SP logging parameters under the constrained condition of relative impedance data volume is forward modeling, which removes the issue of modeling, makes the inverted results be closer to the reality and improves the real resolution of sand bed.
王西文. 提取地震信号高频信息方法的若干问题[J]. 石油地球物理勘探, 2006, 41(1): 67-75.
Wang Xi-wen. Several Issues of methods for detecting high-frequency information of seismic signal. OGP, 2006, 41(1): 67-75.