The Study And Application Of Seismic Prediction Technique For Fluvial Sandbody In Dong 7 Well Block

The central four region of Zhungarica basin is divided into four blocks,the total area is12442.7km~2,it is located in the eastern section of Changji Depression in the central depression,which is north to Baijiahai Arch and northwest to Maqiao arch and east to Shazhang fracture zone and south to Fukang fracture zone,the area is 2891.7km~2.the sediment sources are mainly controlled by the northeast Kelameili Mountain,the alluvial plain deposition under the background of meandering river is mainly developed.After literature review home and abroad,firstly,this paper introduces the current trends of fluvial facies sand body interpretation in China and abroad.And then applies related attributes to this project,through comparison and analyzing we found that amplitude attributes are more effective in channel sand body characterization.This paper optimized RMS amplitude attribute,sweet spot attribute,arc length attribute to track the channel sand body,and finally implemented the artificial interpretation of the channel sand body,How ever,during the interpretation of the channel sand body,due to the unreasonable selection of time windows and subjective errors in the process of manual tracking,although the interpretation of the results has a certain reference value,but not as the final research results.In addition,this paper puts forward that applying trace integration technology in the interpretation of channel sand body.Through theoretical analysis and application in practical data,.We not only achieved a good interpretation's effect,but also obtained a more accurate thickness prediction result than the conventional tuning amplitude attribute prediction,which improved the effective of the trace integration in the interpretation of the thin sand bodies;Finally,Finally,by analyzing the reflection mechanism of the thin sand body,we found the reflection characteristics of the"symmetrical bipolar",and based on the previous research,this paper put forward applying pattern recognition technology to the automatic tracing and interpretation of the channel thin sand body,we completed the automatic identification and tracing of channel sand body,and we obtained the sand body thickness result of the target reservoir under the control of well D701 and D7.Compared with the conventional interpretation method,it is found that there is no subjective error in the interpretation result based on pattern recognition,and the result is more reasonable.