Kirchhoff migration and AVO in the case of a thinly layered overburden

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:80319

Widmaier, M; Shapiro, S A; Hubral, P ^[1]

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1. Univ. of Karlsruhe (Germany)

For wave propagation through a stack of thin horizontal layers a frequency-dependent anisotropy of physical parameters and a significant transmission loss is observed. Information on depth, dip and reflection coefficients of a target zone obtained by seismic migration/inversion schemes and amplitude versus offset (AVO) analysis will, therefore, be distorted by overburden effects. If few statistical parameters of such a vertically inhomogeneous medium are known, a generalized O`Doherty-Anstey formula can be used for taking into account this influence of the overburden. This analytic formula represents the transmission response of a random stack of layers for an incident time-harmonic plane wave. The authors combine amplitude-preserving prestack Kirchhoff migration with the generalized O`Doherty-Anstey formula to recover the true AVO/AVA behavior of a target zone. The correction is demonstrated for the case of SH-waves.

• OSTI ID: 80319
• Report Number(s): CONF-941015--
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
58 GEOSCIENCES
DATA ANALYSIS
DATA PROCESSING
GEOLOGIC STRATA
IMAGE PROCESSING
PETROLEUM INDUSTRY
RESEARCH PROGRAMS
RESPONSE FUNCTIONS
SEISMIC SURVEYS
SEISMIC WAVES
THREE-DIMENSIONAL CALCULATIONS
WAVE PROPAGATION