【摘要】 在地震波阻抗成像和岩石物理解释中,低频信息是非常重要的。缺失低频会导致地震波频带变窄,时间域分辨率降低,最终会使波阻抗成像错误或造成虚假成像,这将会造成储层预测和岩石物理解释不正确。针对同一工区的两块资料ZJNew和ZJOld进行了波阻抗反演,含较多低频成分的ZJNew资料的反演结果分辨率较高。通过楔形模型反演结果的比较可知,低频缺失会导致在储层位置出现虚假薄夹层,造成储层预测解释错误。更多还原

【Abstract】 Low frequencies in seismic data are necessary for proper acoustic impedance imaging and petrophysical interpretation.Lack of lower frequencies will make frequency band of seismic narrow,decrease the time domain resolution,eventually lead to the wave impedance false imaging or sham imaging.That will lead to incorrect reservoir interpretation and petrophysical predictions.We have inverted acoustic impedance volume using two pieces of seismic data,the ZJNew and ZJOld,at the same project.The ZJNew which contains lower frequencies yields a higher resolution image of inverted acoustic impedance volume.Comparing and analyzing the inversion results of wedge model,it indicates that lack of lower frequencies lead to false high acoustic impedance layer appearing in thick reservoir of wedge and cause the reservoir prediction interpretation incorrecttly.更多还原