2014-10-222014-10-221998-09QUEIROZ, Norcirio Pantoja. Migração 3D no tempo usando a teoria dos raios paraxiais. 1998. 77 f. Dissertação (Mestrado) - Universidade Federal do Pará, Centro de Geociências, Belém, 1998. Curso de Pós-Graduação em Geofísica.https://repositorio.ufpa.br/handle/2011/5920This presentation aims at the 3-D time migration of zero offset data, in true amplitude. This method is based on paraxial ray theory and uses a diffraction time function which is directly and correctly determined by the measurement of pre-stack seismic data. It is not necessary to know a macro velocity model in order to apply the time migration. In order to obtain a true amplitude time migration the migration result must be multiplied by a scaling factor and convolved with a known function. Together with a scaling factor, a filter was applied in order to recover the signal phase altered during the migration process. Due to the computational limitation synthetic dada in 2-D was used aims to test the program efficiency. The result was satisfactory, showing the efficiency and robustness of process.porAcesso AbertoMigração em tempoTeoria do raioDifraçãoDissertaçãoCNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::GEOFISICA::SISMOLOGIA