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Stoneley Wave Propagation Across Borehole Permeability Heterogeneities
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1994)
An important application of borehole acoustic logging is the determination of formation
permeability using Stoneley waves. Heterogeneous permeable structures, such as fractures,
sand-shale sequences, etc., are commonly ...
Acoustic Wave Propagation In And Around A Fluid-Filled Borehole Of Irregular Cross-Section
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1994)
Boreholes with 10% or more ellipticity are not uncommon. In this paper, we consider
the coupling of an incident elastic wave into a borehole of irregular cross-section and
investigate the cross-mode coupling phenomenon ...
Borehole Wave Propagation In Isotropic And Anisotropic Media II: Isotropic Formation
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1994)
In this paper we apply the 3-D finite difference method to simulate borehole wave
propagations in an isotropic formation. The scheme is tested in a fluid-filled borehole
surrounded by the homogeneous elastic formation. ...
Borehole Wave Propagation In Isotropic And Anisotropic Media III: Anisotropic Formation
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1994)
In this paper we extend the 3-D finite difference method to simulate wave propagations in
an anisotropic medium. The scheme is tested in the homogeneous medium. The finite
difference results agree excellently with the ...
Experimental Study Of The Flexural Waves In The Fractured Or Cased Borehole Model
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1994)
The ultrasonic logging is performed with dipole transducers in aluminum and lucite
borehole models to study the propagation of the flexural waves in a fractured or cased
borehole. The experimental results show that the ...
Untitled
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1994)
This paper describes a propagator matrix formulation for the problem of the Stoneley
wave propagation in an irregular borehole. This is based on a simple one-dimensional
theory that is possible for the low frequency ...
Borehole Wave Propagation In Isotropic And Anisotropic Media I: Finite Difference Method
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1994)
In this paper we developed a 3-D finite difference method to simulate wave propagations
in an isotropic medium. The wave equation is formulated into the first-order hyperbolic
equations by using velocity and stress and ...
Report Summary
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1994)
This report contains the results of work completed during the twelfth year of the Borehole Acoustics and Logging Consortium in the Earth Resources Laboratory at M.LT.
This year we have achieved one of our major goals in ...
Fast Inversion Of Formation Permeability From Stoneley Wave Logs Using A Simplified Blot-Rosenbaum Model
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1994)
This paper describes a fast algorithm for estimating formation permeability from Stoneley
wave logs. The procedure uses a simplified Biot-Rosenbaum model formulation. The
input to the inversion is the Stoneley wave ...