Print Email Facebook Twitter Tomographic inversion of focusing operators Title Tomographic inversion of focusing operators Author Cox, B.E. Contributor Berkhout, A.J. (promotor) Gisolf, A. (promotor) Faculty Applied Sciences Date 2004-03-02 Abstract Seismic images of the structure of the earth are a prerequisite for finding new hydrocarbon reservoirs. The quality of a seismic images is highly dependent on the accuracy of the velocity model of the subsurface. Conventional imaging consists of an iterative process between obtaining the image using a velocity model, and updating this model by investigating the properties of the image. The Common Focal Point (CFP) method makes it possible to analyze and treat seismic data in a fundamentally different way as it uses a two-step approach: 1) two-way reflection data are transformed into one-way data by estimating focusing operators, and 2) these focusing operators are used to estimate the velocity model by tomographic inversion. This second step, the tomographic inversion of focusing operators, is the subject of this thesis. This research contains two important new aspects. First, the use of focusing operators in (3D) velocity model estimation. Second the data-driven approach of the method. Some additional concepts like the inclusion of a priori information, the joint inversion of P and S-wave operators, and the new concept of the focal point clouds, by which the adequacy of the velocity model can be analyzed, are also addressed. After evaluation of the method of tomographic inversion of focusing operators on both synthetic and real data it can be concluded that the method results in accurate velocity models and is capable of dealing with complex subsurface models. Subject seismicstomographyinversioncfp methoda priori informationp and s waves To reference this document use: http://resolver.tudelft.nl/uuid:fc907162-ef61-4be6-ba5d-50e6b735a4d9 Publisher B.E. Cox ISBN 90-901-7792-2 Part of collection Institutional Repository Document type doctoral thesis Rights (c) 2004 B.E. Cox Files PDF as_cox_20040302.pdf 16 MB Close viewer /islandora/object/uuid:fc907162-ef61-4be6-ba5d-50e6b735a4d9/datastream/OBJ/view