Numerical modeling of borehole acoustics : parallel implementation of a loggin-while-drilling (LWD) model
Name
48625542-MIT.pdf
Description
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2.42 MB
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Checksum (MD5)
96ee71415e6bc1fa99970078d057c0b6
Author(s)
Briggs, Victoria Alice, 1974-
Advisor(s)
Daniel Burns and Rama Rao V.N.
Date Issued
2000
Publisher
Massachusetts Institute of Technology
Abstract
A finite difference code is used to investigate acoustic waves in a borehole environment. The wave response to a logging-while-drilling (LWD) geometry is modeled in a fast formation. Helical waves circling the tool are shown to asymptote to the Stoneley wave velocity, giving confirmation of the fluid velocity in the borehole. Parameter studies for simpler borehole geometries show that the Stoneley wave, in soft formations where no shear arrival is present, can be used to invert for the shear velocity of the rock. A Beowulf parallel computer is used to implement the finite difference code showing the efficiency of cluster computing in a discretized space.
Description
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2000.
Includes bibliographical references (p. 41-42).
Subjects
Earth, Atmospheric, and Planetary Sciences.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
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