Migrated Exploding Reflectors in Evaluation of Finite Difference Solution for Inhomogeneous Seismic Models

Maryam Nejati, Hosein Hashemi

Institute of Geophysics, University of Tehran, Tehran, Iran.
R&D Department, Dana Geophysics Co., Tehran, Iran.

DOI: 10.4236/eng.2012.412A120                

Abstract

Earth is inhomogeneous, which means its elastic characteristics change with depth. The seismic method employs the propagation of waves throughout the earth to locate different structures and stratigraphy. Understanding the wave propagation is an important matter in exploration seismology; therefore modeling of seismic wave is an important tool. To validate the interpreted earth model out of the seismic data, seismic synthetic seismograms should be generated in a process named “seismic forward modeling”. Finite difference method is used as one of the most common numerical modeling techniques. In this paper the accuracy of finite difference method in seismic section modeling is explored on different modeled data set of heterogeneous earth. It is shown that finite difference method completes with migration to reposition the events in their correct location. Two different migration methods are used and various velocities are also tested to determine an appropriate migration velocity. Finally the validly of finite difference modeling is examined using a 2D structural similarity index technique.

Keywords

Finite Difference Method; Seismic Modeling; Migration; Exploding Reflector; Structural Similarity Index

Conflicts of Interest

The authors declare no conflicts of interest.

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