Constructing velocity models near salt bodies

摘要

A method and apparatus for constructing a velocity model of a subsurface of the earth, is disclosed herein. Seismic data may be received. A first velocity model of the subsurface may be constructed using the seismic data. The subsurface may have one or more salt bodies. A second velocity model of the subsurface without the salt bodies may be constructed using the seismic data. A set of attributes induced by the salt bodies may be determined based on the first velocity model and the second velocity model. A stiffness tensor change between the first velocity model and the second velocity model may be calculated based on the set of attributes induced by the salt bodies. The first velocity model may be updated based on the stiffness tensor change.

主权项

1. A method for constructing a velocity model of a subsurface of the earth, comprising:
receiving seismic data acquired by one or more receivers; constructing a first velocity model of the subsurface having one or more salt bodies using the seismic data; constructing a second velocity model of the subsurface without the salt bodies using the seismic data and tomography; determining a set of attributes induced by the salt bodies based on the first velocity model and the second velocity model; calculating a stiffness tensor change between the first velocity model and the second velocity model, based on the set of attributes induced by the salt bodies; and updating the first velocity model based on the stiffness tensor change.