The regional multiple seismic attribute quantitative reservoir prediction method based on sedimentary characteristics
Zhang Xuejuan1, Lu Shuangfang1, Jia Chengzao2
1. College of Earth Sciences,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;
2. China National Petroleum Corporation,Beijing 100724,China
Abstract：Conventional multiple seismic attributes quantitative reservoir prediction method are fast and effective.However the accuracy of this method would decrease if the study area is large and depositional environment is complex.To this end,the paper proposes a quantitative reservoir prediction method by multiple-seismic-attributes based on dividing the study area to different regions by depositional characteristics.Firstly,the study area is divided into different regions according to their depositional characteristics by seismic waveform classification,and then linear fit is progressed between multiple seismic attributes and reservoir information in different regions,finally,fitting results of different regions are synthesized as the predicting results of reservoir information in the whole area.The reservoir prediction of Denglouku formation in Xujiaweizi area,east of Daqing placanticline in the north of Songliao Basin,was made.The sandstone data of 104 wells and 7 optimized seismic attributes were used,the fitting degree was only 0.48 by the gradual linear regression method,which was increased to 0.83 by the multiple seismic attributes quantitative reservoir prediction method based on dividing regions according to sedimentary characteristics,at the same time the predicted results agreed with the sedimentary laws and geological knowledge.
