The Study On Seismic Interpretation In Further Domain Of Complex Fault Zone In Southern Section Of Dachang Depression

Seismic data interpretation is a very important part of seismic exploration.In recent years,although the seismic interpretation technology has developed rapidly,the applicability technology for specific research areas needs to be selected and summarized according to the actual geological conditions and seismic data.With the Oilfield benefit exploration requirement interpreter must know well the existing data and interpret seismic cube in further.In China eastern rift basins,the complex fault blocks oil and gas reservoirs make up a largr proportion and is of great significance to the increasement of oil production and storage.Therefore,We launch the perceptual interpretation in further for the complex fault zone of the southern section of Dachang Depression,including fine structure interpretation,sequence deposition interpretation and fine reservoir prediction.By the fine structure interpretation research for the complex fault zone of the southern section of Dachang Depression with the existing 3D Seismic data,the paper summarizes the complex fault zone structure interpretation method which is fit for Dachang Depression.The method is based on the interpretive filtering process and includes the seismic attribute extraction and attribute fusion as the core,what’s more we innovate to apply the fault identification method of the complex tectonic belt with the inclination angle attribute and seismic data fusion.which provides technical guarantee for the depiction of the Dachang deposition fault and the implementation of the structural traps,and clarifies the fault space in the study area And the tectonic evolution of the southern part of Dachang Depression.At the same time,we launch the seismic sequence and sedimentary interpretation techniques study,and summary the seismic sequence identification and interpretation techniques,seismic facies analysis techniques suitable for Dachang depression,the stratigraphic section technique based on 90°phase process and the reservoir prediction techniques based on seismic inversion.Then we establish the reservoir stratigraphic framework,and clarify the distribution characteristics of the seismic facies and sedimentary facies in the study area.and predict the reservoir distribution.Through the practice and summary of the applicability further interpretation technology in Dachang depression,it is clear that the Dachang Depression has great exploration potential,and two key exploration zones are selected to evaluate the favorable exploration targets,and also provides some technical reference for the eastern rift basin Strong structural tectonic belt interpretation.