The concept of high-frequency sequence stratigraphic body is put forward for the first time,which refers to the three-dimensional sequence body with geological significance by interactive calibration of the stratigraphic body generated by seismic reflection and the high frequency sequence framework of logging,which is the further development and extension of seismic stratigraphy,sequence stratigraphy and well logging geology.In the seismic wave group limited by the space of high frequency sequence,the vertical and horizontal sedimentary information contained in the wave group can be dynamically and isochronously mined,and the vertical evolution sequence of sedimentary facies also can be further dissected,and the lateral change law of sedimentary facies belt can be predicted theoretically.In this paper,the calculation principle of horizoncube,the calibration of stratigraphic bodies,and the realization process of high-frequency sequence stratigraphic bodies(HFSSB)are introduced in detail.Taking the small layers S5 and S6 of Y oilfield as an example,the HFSSB are generated by the interactive calibration of seismic reflection layers and the logging high-frequency sequence framework.Ten five-order high-frequency cycles were further subdivided in a period of transgression and retrograde in the tidal flat carbonate reservoir.According to the reflection interface of the reservoir position in the cycle,the isochronous seismic attribute slices were continuously extracted according to the time series of vertical deposition by using the seismic wave group limited by the corresponding seismic wave group.Compared with the traditional stratigraphic slice attributes,the detailed characteristics of the transverse deposition can be more accurately described.Based on the restored paleoborphogeny,combined with logging and geological calibration information,the spatial distribution of carbonate deposits reflected by the characteristics of high frequency sequence strata is analyzed vertically according to the sedimentary sequence,to describe the changes of tidal channel and the spatial-temporal evolution of shoal deposits more accurately.
high frequency sequencehorizon cubestratigraphic bodycarbonate reservoirsedimentary evolution
万方数据
维普
