The Community for Technology Leaders RSS Icon Issue No.06 -
Nov.-Dec. (2014 vol.16) pp: 60-67 Danping Cao , China University
of Petroleum, Huadong Wenyuan Liao , University of Calgary
Waveform tomography, or full waveform inversion (FWI), is in
general better than ray tomography; however, a reliable initial
model is usually required to ensure success. Here, the authors
designed a cascade-like hybrid tomography technology to solve
the crosswell seismic inversion problem. The new method is a
combination of several widely used tomography technologies,
implemented in a sequence, where the cheaper method is used as
the initial model feeder for the more expensive method. They
start with the Radon-transform-based back-projection method;
then the Linear Iterative Reconstruction method, such as
selective internal radiation therapy, is adopted to update this
initial model; which is further improved by the nonlinear,
Gradient-based Eikonal Equation Tomography method. Finally, the
velocity model reconstructed from the pr