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Now showing items 1-8 of 8
Tube Wave Attenuation and In-Situ Permeability
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1985)
The measurement of in-situ permeability is very important in exploration and
production logging. Observed data show that tube wave attenuation in full waveform
acoustic logs is correlated with formation permeability. It ...
Energy Partitioning and Attenuation of Guided Waves in a Radially Layered Borehole
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1985)
Recently published results (Tubman et al., 1984; Baker,. 1984) indicate that
synthetic full waveform acoustic logs generated in cased or damaged boreholes
differ significantly from those generated in an open hole with ...
Full Waveform Acoustic Logging - From Theory To Applications
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1985)
This report contains results from the third year of the Full Waveform Acoustic
Logging Consortium and rock physics studies at M.J.T. This year marks the completion
of the first phase of the project which has been directed ...
The Full Waveform Acoustic Log Inversion Problem
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1985)
This paper presents the full waveform acoustic log inversion problem for a
multisource - multireceiver tool logging a cylindrical fluid-filled borehole. The problem
is formulated in the frequency-depth domain. A priori ...
Asymmetric Modes of Elastic Wave Propagation in a Fluid-Filled Borehole
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1985)
A numerical investigation of asymmetric modes of elastic wave propagation in a
fluid-filled borehole is treated in this paper. The dispersion curves of guided waves
(called flexural waves) and synthetic microseismograms ...
A Numerical Investigation of Head Waves and Leaky Modes in Fluid-Filled Boreholes
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1985)
Although synthetic borehole seismograms routinely can be computed for a wide
range of borehole conditions, the physical nature of shear and compressional head
waves in fluid-filled boreholes is poorly understood. This ...
The Effects of Confining Pressure and Fluid Saturation on Ultrasonic Velocities in Rocks
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1985)
Laboratory measurements of ultrasonic p- and S-wave velocities were made as
a function of confining pressure for vacuum dry, benzene-, and water-saturated
samples of Westerly granite, Bedford limestone, and Weber, Navajo, ...
Sandstone Pore Aspect Ratio Spectra from Direct Observations and Velocity Inversion
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1985)
Measurements of pore shapes from Scanning Electron Microscope (SEM) images
for three sandstone samples (the Navajo Sandstone, the Weber Sandstone, and the
Kayenta Sandstone) are compared to the aspect ratio spectra ...