Visual Analytics Of Uncertainty Based On Multiple Attributes Of Seismic

With the rapid development of seismic survey and exploration technology,geological researchers face new challenges in dealing with seismic data,and put forward some new requirements for the accuracy and rationality of seismic data.Seismic data generally carry a large number of uncertainties.Studying these uncertainties to solve the problems of reservoir storage and other issues has vital scientific significance.In this thesis,the uncertainties of seismic attributes data are studied.The accuracy and rationality of the uncertainty model of seismic attribute are analyzed and discussed by using the methods of visual analytics.In the process of modeling uncertainties,it is important to listen to professional geologists' expertise and opinions.Therefore,to get an uncertainty model which is accorded with the requirements of professional geologists,an interactive visual analysis system is designed to modify the uncertainty model in this thesis.The main work and innovation of visual analytics of uncertainty based on multiple attributes of seismic in this thesis are listed as follows:Firstly,the uncertainty of the boundary range of the target body corresponding to the single attribute data of the seismic is studied.A new uncertainty modeling method based on single seismic attribute data is proposed in this thesis.According to the uncertainty modeling method of each seismic attribute data,the uncertainty field based on scatter points of the target body is established.And the method of evidence theory is used to merge the uncertainty fields of scatter points of the target body corresponding to the three seismic attributes together.Then finally,an uncertainty field which represents the real positions of scatter points of the boundary of the target body is obtained.Secondly,according to the uncertainty field based on scatter points of the target body corresponding to seismic attribute data established in the first point,a visual analysis method based on human-computer interaction is used to analyze and discuss its accuracy and rationality in this thesis.A new framework of visual analytics and a new process of human-computer interaction are proposed to redefine and modify the uncertainty model established in the first point.On the basis of the new framework of visual analytics and the new process of the human-computer interaction,a visual analysis system based on the uncertainty of seismic attribute is designed in this thesis.The operation of human-computer interaction is implemented in this system.This analysis system is used to analyze the uncertainty models of seismic attributes established in the first point interactively.After a series of interactive analysis by using the visual analysis system,an ideal uncertainty model can be obtained at the end,which is satisfied the requirement of professional geological researchers.