Seismic modeling and reverse-time depth migration by flux-corrected transport

Technical Report · Fri Jan 01 04:00:00 EST 1993

DOI:https://doi.org/10.2172/6789377· OSTI ID:6789377

Fei, Tong

Where the Earth's subsurface is generally inhomogeneous, lateral and vertical variation in velocity and density should be considered when doing seismic modeling and migration. Finite-difference modeling and reverse-time depth migration based on the full wave equation are approaches that take such variation into account. Here, through a change of dependent variables, the second-order acoustic wave equation is replaced by four first-order partial differential equations. The flux-corrected transport (FCT) method, commonly used in hydrodynamics for shockwave simulation, can then be used in solving these equations. The FCT method offers the opportunity to preserve a broader range of frequencies at lower computational cost than in conventional finite-difference modeling and reverse-time wave extrapolation. Moreover, it is also applicable in circumstances involving discontinuities in the wavefield, where other conventional finite-difference approaches fail. Computed two-dimensional impulse responses and synthetic data indicate that this method can accurately image positions of reflectors with greater than 90-degree dip for variable-velocity media.

• Research Organization: Colorado School of Mines, Golden, CO (United States). Center for Wave Phenomena
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-89ER14079
• OSTI ID: 6789377
• Report Number(s): DOE/ER/14079-23; CWP--128; ON: DE93006558
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580000* -- Geosciences
COMPUTER CALCULATIONS
DATA ANALYSIS
DENSITY
GEOPHYSICAL SURVEYS
PHYSICAL PROPERTIES
SEISMIC SURVEYS
SEISMIC WAVES
SURVEYS
VELOCITY