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Detection of Open Fractures with Vertical Seismic Profiling
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1984-01-01)
In Vertical Seismic Profiling surveys tube waves are generated by compressional waves impinging on subsurface fractures or permeable zones. The problem of generation of these waves by a non-normal incident P wave for an ...
Detection Of Subsurface Fractures And Permeable Zones By The Analysis Of Tube Waves
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1983)
In Vertical Seismic Profiling tube waves are generated by compressional
waves impinging on subsurface fractures or permeable zones. The amplitude of
tube waves is dependent upon the formation permeability, the length of ...
Approximate Effects of Off-Center Acoustic Sondes and Elliptic Boreholes Upon Full Waveform Logs
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1983)
Full waveform acoustic well logging has become instrumental to hydrocarbon exploration because of its ability to determine in situ velocity information for P and S waves as well as the attenuation (or absorption) of seismic ...
Seismic Waves in a Borehole - A Review
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1983)
The propagation of seismic waves in an open borehole is reviewed. The principal wave types are the refracted P and S waves and the two guided waves - pseudo-Rayleigh and Stoneley. The dispersion properties of the guided ...
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 ...
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 ...
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 ...
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 ...