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Polarization Of Flexural Waves In An Anisotropic Borehole Model
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1995)
Two modes of flexural waves can be generated by a dipole source in an anisotropic
borehole. Their velocities are related to those of the fast and slow shear waves in
the formation. The particle motions and the polarization ...
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 ...
A robust method for fracture orientation and density detection from seismic scattered energy
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2011)
The measurements of fracture parameters, such as fracture orientation, fracture density and fracture compliance, in a reservoir is very important for field development and exploration. Traditional seismic methods for ...
Seismoelectric And Seismomagnetic Measurements In Fractured Borehole Models
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1999)
Seismoelectric and seismomagnetic fields generated by acoustic waves in fluid-saturated
fractured borehole models are experimentally investigated with an electrode and a Halleffect sensor. In a borehole with a horizontal ...
Asymmetric source acoustic LWD for the improved formation shear velocity estimation
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2009)
Most acoustic LWD tools generate a single pure borehole mode (e.g., dipole or quadrupole) to
estimate the formation shear velocity. We propose an approach where many borehole modes are
generated and all the modes are ...
Seismoelectric measurements on artifical porous media and Berea sandstone
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2009)
Seismic to electromagnetic wave conversion has been proposed
as a possible exploration method. We present laboratory measurements
of the conversion of an acoustic wave into electric potential,
which occurs at a ...
An Experimental Study Of Seismoelectric Signals In Logging While Drilling
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2005)
Acoustic logging while drilling (LWD) may be complicated because of contamination by waves propagating along the drill collar (the tool waves). In this paper we propose a new method for separating tool waves from the true ...
Experimental and Theoretical Studies of Seismoelectric Effects in Boreholes
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2005)
In a fluid-saturated porous formation, an impinging seismic wave induces fluid motion. The motion of fluid relative to the rock frame generates an electric streaming current. This current produces electric and magnetic ...
Experimental Studies of Reflections from Single and Multiple-Fractures Using Lucite Models
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2011)
Laboratory acoustic measurements are performed with Lucite fracture models to understand the reflection characteristics of a seismic wave in a fracture zone. The fracture models include single fracture, dual fracture, and ...
Sonic Logging in Deviated Boreholes in an Anisotropic Formation: Laboratory Study
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2006)
Deepwater field development requires drilling of deviated or horizontal wells. Most formations encountered can be highly anisotropic and P- and S-wave velocities vary with propagation directions. Sonic logs acquired in ...