High precision 3Dseismic technology and effect analysis of Madian area,Nanyang sag

In view of the characteristics of the target intervals,such as deep buried depth,developed fractures and broken structure,in the process of high precision 3D seismic exploration,by using the parameters argumentation of the model based on the forward model,adopting the small bin and wide azimuth observation,through the lithology acquisition technology,such as the fine surface structure survey,well depth design point by point and optimum excitation lithology,the single shot quality of seismic data has been improved.As for processing,by using the technology of static correction,pre-stack noise elimination,precise velocity modeling and pre-stack depth migration,the imaging accuracy of seismic data in the complex fault zone has been enhanced.As for interpretation,with the combination of 3D visualization and coherent data volume,through the fine mapping,the complex faulted block traps in Madian area have been made clear and therefore,new oil-bearing faulted blocks have been discovered by drilling.