Velocity Analysis by Inversion
Abstract
In conventional inversion methods, imaging structure inside the earth requires reasonable background velocities. In this paper, velocity analysis and structural imaging are done at the same time. The medium is assumed to consist of constant-velocity layers separated by arbitrary, smooth interfaces. The objective of the inversion is to determine layer velocities and locations of the interfaces. The velocity analysis is based on the principles that the images will be distorted when erroneous velocities are used. In particular, the difference between the depths computed by inversions from different experiments can be a measure of the error in velocity. The formulas of sensitivity to velocity error are derived for some special cases. Some computer implementations for both synthetic data and experimental data are done.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 20, 1991
- Accession Number
- ADA241003
Entities
People
- Norman Bleistein
- Zhenyue Liu
Organizations
- Colorado School of Mines