Subsurface velocity determination by grid tomography of depth migrated gathers

Dan Kosloff, Uri I. Zackhem, Zvi Koren

Research output: Contribution to conferencePaperpeer-review

Abstract

Determination of subsurface interval velocity is important for imaging by prestack migration, AVO studies and full waveform inversion. We propose a method which uses depth migrated gathers directly, and does not necessarily need a depth model. The approach is complementary to horizon based tomography. When a subsurface model can be identified, model-based tomography seems appropriate since it produces geologically constrained updates. However, if no depth model can be determined initially, a grid based approach is advisable, where one can update an interval velocity section without building a depth model.

Original languageEnglish
Pages1815-1818
Number of pages4
DOIs
StatePublished - 1997
Externally publishedYes
Event1997 Society of Exploration Geophysicists Annual Meeting, SEG 1997 - Dallas, United States
Duration: 2 Nov 19977 Nov 1997

Conference

Conference1997 Society of Exploration Geophysicists Annual Meeting, SEG 1997
Country/TerritoryUnited States
CityDallas
Period2/11/977/11/97

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