TITLE:
Migrated Exploding Reflectors in Evaluation of Finite Difference Solution for Inhomogeneous Seismic Models
AUTHORS:
Maryam Nejati, Hosein Hashemi
KEYWORDS:
Finite Difference Method; Seismic Modeling; Migration; Exploding Reflector; Structural Similarity Index
JOURNAL NAME:
Engineering,
Vol.4 No.12A,
December
31,
2012
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.