测井约束地震反演的分辨率与地震分辨率的关系

以某地区的井资料和联井剖面为背景，首先分析井资料不同采样的声阻抗和不同主频的合成记录，以及用不同的声速模型和不同主频及频宽的Ｒｉｃｋｅｒ子波对声速模型作正演，得到不同频率的地震剖面。然后，对由这些剖面作测井约束地震反所得到的不同反剖面进行分析。最后，对实际资料作反演分析，定性及定量地了测井约束地震反的纵向分辨率不仅受地震采样率的限制，而且受到地震主频和频宽的制约。同时，也探讨了地震地质解释中地震

Relation between the resolution of well log constrained seismic inversion and seismic resolution

Taking the well data and well-tie sections in an area as a background, we first analyze thewave impedance with different well data sampling rate and the synthetic seimograms with differentdomnant frequency, and then use various acoustic velocity edels and Rcker wavelet with differentdominant frequency and bandwidth to get seismic asetions through forward modelling. For these sec-tions, well log constrained seisnic inverson is performed, obtaining vdrious inversion sectbos. Finally,inversion and analysis are conducted for real data, indicating qualitatively and quantitatively that the ver-tical resolution of well log constrained seismic inversion is no only limited by sesmic sampling rate, buta1so restricted by seismic dominant frequency and bandwidth. Also discussed is the relation between seis-mic resolution and stratigraphic rerolution in seismogeologic interpretation.