Font Size: a A A

Inversion Method Of Multi-Component Induction Logging Data Processing

Posted on:2016-07-06Degree:MasterType:Thesis
Country:ChinaCandidate:T T ZhengFull Text:PDF
GTID:2180330479951064Subject:Electronics and Communications Engineering
Abstract/Summary:PDF Full Text Request
The purpose of this paper is to establish a rapid and stable inversion method of the solution of the multi-component induction logging data processing problems, to solve low efficiency and poor stability problem in the presence of the logging inversion problem.Firstly, according to the basic principles of multi-component induction logging, by the mutual relations among the three conversion of formation coordinate system, well-axis coordinate system and instrument coordinate, the electromagnetic induction tensor components of 9 groups of signal are extracted. The induction tensor matrix representation and analytical expressions under various coordinate systems were derived and summarized. By the method of decompositing the wave, the multi-component electromagnetic propagation logging under uniform conditions of uniaxial anisotropic media response is decomposed into four types of electromagnetic waves. Then several logging methods of apparent value conversion are investigated and analysed, and the measurements of deviated and horizontal wells in the borehole axis coordinate are combined and simplified. They are the foundation of building a multi-component induction logging inversion problem. In addition, the combined measurement method of multi-component electromagnetic propagation is also discussed.Secondly, a Gauss-Newton inversion algorithm is proposed, and this method is improved. By the way, the instruments and formation parameters were analyzed through applicating damping regularized Gauss-Newton inversion algorithm theoretical basis, and this paper develops procedures about electromagnetic simulation to verify the usefulness of the Gauss-Newton algorithm inversion problem, but its retrieval accuracy needs further verification.Finally, the paper discusses the SYMPLECTICMETHOD of Hamiltonian system, and sets up the basic theoretical framework of the inverse problem of dynamics SYMPLECTICMETHOD. First, the inverse problem is equivalent to the Hamilton system dynamics; and second, the paper establishes systems to solve the inverse dynamic SYMPLECTICMETHOD Hamilton. Compared with the Gauss-Newton inversion method, the inverse problem about the dynamic equations of SYMPLECTICMETHOD does not require Jacobi matrix inverse operation and shows very good stability.
Keywords/Search Tags:Multi-component induction logging, The apparent value conversion, Composite curve, Gauss-Newton method, SYMPLECTICMETHOD, Hamiltonian system
PDF Full Text Request
Related items