Application of Frequency Division CMY Fusion Technique in Channel Characterization
Various types of channel-sand bodies are developed in the Huagang formation and the shallow Longjing formation in the N structural area of the Xihu sag.In the context of rapid lateral variation in sand body thickness,accurate identification of the channel distribu-tion at the target layer is the key to reservoir prediction in this area.Comprehensive applica-tion of frequency division CMY(C-cyan;M-magenta;Y-yellow;short for these three col-ors)fusion and seismic sedimentology technology,the seismic data are scanned in the whole frequency band,and the single frequency seismic data volume is obtained by frequency divi-sion.On this basis,the favorable frequency band seismic data is selected for CMY volume fusion,and the target layer strata slice of the fusion data volume is made combined with the seismic sedimentology method.By adjusting the colour proportion and display brightness on the slice,the distribution characteristics of channels of different scales are highlighted hori-zontally,and the evolutionary characteristics of channels of different periods are analyzed vertically.Based on this,in the Huagang formation of N Tectonic zone,6 or 7 braided river channels are characterized in the H2 layer and 5 channels are characterized in the H3 layer.And in the shallow Longjing formation,7 channels of different scales are characterized.This method not only depicts channel boundary much more clearly,but also characterizes the par-ticle size and thickness of sediment,so it is very useful in lithology-reservoir prospecting.
NETL
NSTL
万方数据
维普
