Enhancement of diffractions in prestack domain by means of a finite-offset double-square-root traveltime

Autor(es)

Coimbra, Tiago A. ^[1] ; Faccipieri, Jorge H. ^[1] ; Speglich, Joao H. ^[1] ; Gelius, Leiv-J. ^[2] ; Tygel, Martin ^{[1, 3]}

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Ctr Petr Studies, Rua Cora Coralina 350, BR-13089970 Campinas, SP - Brazil

^[2] Univ Oslo, Dept Geosci, POB 1047, N-0316 Oslo - Norway

^[3] Univ Estadual Campinas, Dept Appl Math, Rua Sergio Buarque de Holanda 651, BR-13089970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: GEOPHYSICS; v. 84, n. 1, p. V81-V96, JAN-FEB 2019.
• Citações Web of Science: 1

Resumo

Exploration of redundancy contained in the seismic data set assures enhancement of images that are based on stacking results. This enhancement is the goal of developing multiparametric traveltime equations that are able to approximate reflection and diffraction events in general source-receiver configurations. The main challenge of using these equations is to estimate a large number of parameters in a computationally feasible, reliable, and fast way. To obtain a better fit for diffraction traveltime events than the ones in the literature, we have derived a finite-offset (FO) double-square-root (DSR) diffraction traveltime equation (which depends on 10 parameters in three dimensions and four parameters in two dimensions). Moreover, to reduce the number of parameters, we have developed another version called simplified FO-DSR diffraction traveltime equation (which depends on five parameters in three dimensions and two parameters in two dimensions), which delivers a similar performance. We have developed operators that make use of the simplified FO-DSR traveltime equation to construct the so-called diffraction-only data set volumes (or, more simply, D-volumes) assuring enhancement in the diffraction extraction process. The D-volume construction has two steps: first, a stacking procedure to separate the diffraction events from the input data set and second, a spreading procedure to enhance the quality of these diffractions. As proof of concept, our approach has been tested on 2D/3D synthetic and 2D field data sets with successful results. (AU)

• Processo FAPESP: 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais
• Beneficiário: Munir Salomao Skaf
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs