A Computer Implementation of 2.5D Common Shot Inversion
Abstract
This paper describes the computer implementation of a two-and -one- half dimensional (2.5D) constant density prestack inversion formalism with laterally and depth-dependent background propagation speed. This is Kirchhoff- type inversion, summing a line of receiver data over traveltime curves in the depth-dependent background medium with weights determined from the Born/ Kirchhoff inversion theory. This theory predicts that the output will be a reflector map with peak amplitudes on each reflector being in known proportion to the angularly dependent geometrical optics reflection coefficient. The 2.5D feature provides for out-of-plane spreading correction consistent with the prescribed background medium. The method is applied to a synthetic data set and to an experimental data set generated at the Seismic Acoustic Laboratory at the University of Houston under support of the Marathon Oil Company. The graphical output demonstrates the validity of the formalism as a Kirchhoff migration. Parameter estimation for the experimental data was less successful, partially due to problems with amplitude control in the original experiment and partially due to the limited aperture of the common shot data, thereby suggesting that a common offset inversion might be more useful for parameter estimation. Keywords: Seismic inversion, Seismic data.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1990
- Accession Number
- ADA228788
Entities
People
- Mark J. Emanuel
- Norman Bleistein
- Phillip Bording
- Wenje Dong
Organizations
- Colorado School of Mines