An Amplitude And Traveltime Calculation Using A Higher-Order Parabolic Equation
Name
1996.11 Cheng et al.pdf
Size
428.17 KB
Format
Adobe PDF
Checksum (MD5)
c0664218240617aef8adef8ccbcef18e
Author(s)
Cheng, Ningya
House, Leigh
Fehler, Michael C.
Date Issued
1996
Publisher
Massachusetts Institute of Technology. Earth Resources Laboratory
Series/Report no.
Earth Resources Laboratory Industry Consortia Annual Report;1996-11
Abstract
A higher-order parabolic equation is used to compute the traveltime (phase) and the
amplitude in constant density acoustic media. This approach is in the frequency domain,
thereby avoiding the high frequency approximation inherent in the Eikonal equation.
Intrinsic attenuation can be naturally incorporated into the calculation. The error at
large angles of propagation caused by the expansion of the square root operator can be
virtually eliminated by adding more terms to the expansion. An efficient algorithm is
obtained by applying the alternate direction method. Our results are in excellent agreement with the finite element approach for the range-dependent wedge-shaped benchmark
problem. The amplitude and the phase are calculated for a syncline and the Marmousi
models.
Persistent DSpace Link
