Analysis Of AVO Characteristics Of Complex Media And Inversion Of Elastic Parameters

Seismic exploration is an important means to find oil and gas in the world.The use of seismic exploration information can effectively predict the reservoir oil and gas.The development of seismic exploration and the formation of a new seismic exploration technology that AVO technology.Based on the theory of geophysics,this paper discusses the classical Zoeppritz equation in the isotropic medium and its various approximations,and analyzes the relationship between the various physical formulas and the various parameters.The degree of approximation and the applicable conditions,for the subsequent complex model of the establishment of the bedding.Then we introduce the related theories in anisotropic media,such as genesis,classification,reflection coefficient formula and Thomsen parameter.These are the basis for further study of attenuating anisotropic media.Then,we introduce the related parameters involved in the attenuation of anisotropic media,such as the quality factor Q matrix and the Thomsen form parameter of TI attenuation,and then give the approximate expression of normalized attenuation coefficient and reflection coefficient.At the same time,we study the VTI medium,viscoelasticity.And then proceed to AVO analysis of some theoretical models.In chapter 4,AVO inversion is discussed.Firstly,the idea of AVO inversion is discussed,and then the Zoepprittz equation is introduced in detail.The AVO is carried out in detail.And then the Jacobian iterative method is used to iterate the inversion.On the basis of the inversion results of the model,the results of the two inversion results and the result are analyzed.