Estimación de las velocidades de intervalo a través de la función de tiempos de difracción de la sísmica geométrica

Using the geometrical ray theory and employing the second-order approximation of the traveltimes, a method to determine the interval velocities of a seismic system is presented. Ignoring faults and other complexities, the seismic system is modeled as a stack of isotropic and homogeneous layers separated by arbitrarily-curved smooth interfaces; the velocity and density of these layers may have any values.  Measuring the traveltimes of some specially selected reflected rays, recorded in multiple coverage on the upper border olthe seismic system, the so called Hamilton's point characteristic for reflected events is determined and in consequence the zero-offset diffraction time function is calculated. The interval velocities are calculated through the downward continuation of the zero-offset diffraction time function applying an iterative process layer by layer. This process is controlled by using a focusing principle.

• Autores: Montes Vides, Luis Alfredo
• Tipo de recurso: Article of journal
• Fecha de publicación: 1999
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/42057
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/42057; http://bdigital.unal.edu.co/32154/
• Palabra clave: Geología; Ciencias de la tierra; Geociencias; Tiempos de transito; Sísmica geométrica; Continuación hacia abajo; Teoría del rayo; Geología; Ciencias de la tierra; Geociencias; Travel time; Geometric seismic; Downward continuation; Ray theory
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional