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Report Summary
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1987)
This report contains the results ot work completed during the fifth year of the Full
Waveform Acoustic Logging Consortium in the Earth Resources Laboratory at M.l.T.
During this past year, the emphasis in our research ...
Permeability Estimation from Field Data
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1987)
Strong correlations exist between core measured permeability values and the phase velocity and attenuation of the tube wave obtained from full waveform acoustic logs.
A number of authors have applied the Biot theory to ...
Well-to-Well Log Correlation Using Knowledge-Based Systems and Dynamic Depth Warping
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1987)
We present a novel system for well-to-well log correlation using knowledge-based systems
and dynamic depth warping techniques. This approach overcomes a major drawback inherent
in previous methods, namely the difficulty ...
Logging in Multilayered Saturated Porous Formations
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1987)
We present a general formulation based on the Thomson-Haskell method which allows
the study of complex models. The surrounding formation may be composed of several
coaxial porous shells or of a combination of both porous ...
A Method of Measuring Acoustic Wave Attenuation in the Laboratory
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1987)
The measurement of attenuation is performed by directly determining the attenuation
operator (or the impulse response of the medium) in the time domain. In this way,
it is possible to separate the attenuation operator ...
Ultrasonic Laboratory Study of Full Waveform Acoustic Logs in Boreholes with Fractures
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1987)
A set of ultrasonic experiments was carried out to determine the effects of horizontal and vertical fractures on full waveform acoustic logs. Boreholes of 1 cm diameter were drilled in aluminum blocks. Measurements were ...