Abstract：In poststack migrated sections,the seismic response of underground karst cave is often a string of beads-like characteristic.Based on seismic physical forward simulation and in combination with the practical types of geologic karst cave,the paper designed a set of karst caves with different size and set them into high-velocity layer of three-layer's physical model,and carried out 2-D data acquisition.According to the migrated results of model data,we carried out multi-attributes pickup and analysis in a string of beads-like reflection zone,including autocorrelation function,frequency spectrum,amplitude and trace time-frequency analysis,studied relationship between the size of karst cave and seismic attributes and difference of seismic attributes resulted from different size of karst cave.It is shown by the analysis and correlation of multiple attributes that there exists some regularity between some attributes and sizes of karst cave in vertical and lateral scales,which provided effective analytic method for identifying the feature of karst cave.
王立华, 魏建新, 狄帮让. 溶洞物理模型地震响应及其属性分析[J]. 石油地球物理勘探, 2008, 43(3): 291-296.
Wang Li-hua, Wei Jian-xin, Di Bang-rang. Seismic response of karst cave physical model and analysis of its attributes. OGP, 2008, 43(3): 291-296.
