Using frequency attribute to identify and divide multi-period time-frequency sequences of continental basin: case of Lower Cretaceous Qingshankou Formation-Yaojia Formation in northwest Qian area of Songliao Basin
Xia Zhu1, Zhang Zhen-sheng2, Sun Chang-hong1, Chen Geng-yi1, Cheng Yi2
Abstract：Lower Cretaceous Qingshankou Formation-Yaojia Formation in northwest Qian area of Songliao Basin is important targets of seismic exploration and development in Jilin Oilfield,having complex thin sandstone/mudstone-interbedded structure of lake basin.Former-used common interpretation methods for identifying the thin reservoirs based on common seismic data have ability falling short of our wishes.We begun to explore a set of the methods for identifying and dividing thin sandstone/mudstone interbedded multi-period time-frequency sequences after finishing 3-D high-resolution seismic exploration in that area and using frequency attribute and directional change of frequency in time domain of 3-D time-frequency seismic data volume to identify and divide the time-frequency sequences in different periods.The studied results showed that there exists the good corresponding relation between stratigraphic sequence and time-frequency sequence,that means,the seismic response of stratigraphic sequence has directivity in frequency,the frequency of different type's sequence has different directional character,the distributed feature of frequency in time-frequency analysis sections conforms to sedimentary regularity of formations.It considered in view of the above that the method has good application prospect in the aspect of analyzing thin sandstone/mudstone interbedded sequence of continental facies.
夏竹, 张振生, 孙长虹, 陈耿毅, 程怡. 利用频率属性识别和划分陆相盆地多期时频层序——以松辽盆地乾西北地区下白垩统青山口组—姚家组为例[J]. 石油地球物理勘探, 2004, 39(6): 730-738.
Xia Zhu, Zhang Zhen-sheng, Sun Chang-hong, Chen Geng-yi,Cheng Yi. Using frequency attribute to identify and divide multi-period time-frequency sequences of continental basin: case of Lower Cretaceous Qingshankou Formation-Yaojia Formation in northwest Qian area of Songliao Basin. OGP, 2004, 39(6): 730-738.
