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Determination Of In-Situ Permeability From Tube Wave Velocity And Attenuation
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1986)
Recent investigations by a number of different authors have shown that the phase velocity
and attenuation of the tube (Stoneley) wave in the borehole is correlated with in situ
permeability. Specifically, velocity decreases ...
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 ...
Free Pipe Effects On Guided Wave Propagation
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1986)
The effects of free pipe on the pseudo-Rayleigh and Stoneley waves are studied by introducing a fluid annulus between the casing and cement layers of a cased borehole
model. The existence of a fluid annulus region results ...
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 ...
Inversion of Borehole Guided Wave Amplitudes for Formation Shear Wave Attenuation Values
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1987)
A linear least squares inversion, based on analytic partition coefficient expressions, is
developed to estimate the fluid and formation shear wave Q values from spectral ratio
measurements-of the guided wave arrivals of ...
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 ...