Browsing Earth Resources Laboratory by Title
Now showing items 146-165 of 456
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Executive Summary
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2001)Our research results for the past year are divided into two major areas: 1) the quantification and prediction of reservoir heterogeneity and 2) the use of borehole measurements to quantify fluid flow related properties. ... -
Executive Summary
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2002)During the past year, our research effort has continued to focus on borehole acoustics and reservoir characterization. The papers presented at the annual meeting, and those included in this volume, include theoretical ... -
Executive Summary-Characterization Of Reservoir Fluid Flow Properties
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1998)The characterization of subsurface fluid flow is the key to exploration, production, and management of oil, gas, geothermal, and groundwater reservoirs. From a research perspective the question then becomes how can we ... -
Experimental And Finite Difference Modelling Of Borehole Mach Waves
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1992)A series of model experiments are done in the ultrasonic laboratory to study the radiation of downhole sources in a variety of formations. Three models are used in the experiments. They are a lucite model, a lucite model ... -
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 Design Applied to Borehole DC Resistivity
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2007)This article explores various aspects of geophysical experimental design (ED) applied to single-borehole DC resistivity. For resistivity problems, an experiment or survey is defined as the set of electrode configurations ... -
Experimental Determination of Elastic Anisotropy of Berea Sandstone, Chicopee Shale and Chelmsford Granite
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1985)We use the ultrasonic transmission method to measure P-, SH-, and SV-wave velocities for Chelmsford Granite, Chicopee Shale, and Berea Sandstone in different directions up to 1000 bars confining pressure. The velocity ... -
Experimental Studies of Electrical Fields on a Breaking Rock Sample
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2001)When a rock sample is pressed by a force, the pressure on the crystal lattice generates an electrical field around the quart grains due to the piezoelectric effect. If a rock is saturated by conductive fluid, the relative ... -
Experimental Studies Of Electrokinetic Conversions In A Fluid-Saturated Porous Medium
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1996)The electrokinetic effect in a fluid-saturated porous rock is defined as the coupling and conversion between seismic and electric energies. When seismic waves propagate through a fluid-saturated formation and cause a ... -
Experimental Studies Of Electroseismic Conversion In A Fluid-Saturated Porous Medium
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1997)The coupling between seismic and electromagnetic waves in a fluid-saturated porous medium is essentially controlled by the electrokinetic effect. The inverse effect of the seismoelectric conversion, the electroseismic ... -
Experimental Studies of Multipole Acoustic Logging with Scaled Borehole Models
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2004)A scaled multipole acoustic tool is built for laboratory measurements at ultrasonic frequencies in borehole models. The source with four separate transducers generate monopole, dipole, and quadrupole waves by different ... -
Experimental studies of reflected nearborehole acoustic waves received in borehole models
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2008)Laboratory experiments are performed with an isotropic Lucite borehole model to measure the acoustic wave fields generated by a monopole source in the borehole. The source not only generates acoustic waves propagating ... -
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 ... -
Experimental Studies Of Seismoelectric Measurements In A Borehole
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1997)Experimental and theoretical studies show that there are two kinds of electromagnetic (EM) fields generated by seismic waves in a fluid-saturated porous medium. First, at an interface where the formation properties are ... -
Experimental studies of streaming potential and high frequency seismoelectric conversion in porous samples
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2009)Streaming potential across a porous medium is induced by a fluid flow due to an electric double layer between a solid and a fluid. When an acoustic wave propagates through a porous medium, the wave pressure generates a ... -
Experimental studies of the acoustic wave field near a borehole
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)A monopole or a dipole source in a fluid borehole generates acoustic waves, part of which propagate along the borehole and the other part enter the formation propagating as P- or S-waves. The refracted waves propagating ... -
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 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 ... -
An Experimental Study of Turbidite Channel Deposits: Implications for Channel Evolution and Sandstone Deposits
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2001-05-11)Gaining a detailed understanding of turbidite bed sequences is important for the characterization of sandstone reservoir properties, correlation of well cores, and geological interpretation. Many factors influence the ... -
Experimental Verification of Acoustic Waveform and VSP Seismic Tube Wave Measurements of Fracture Permeability
(Massachusetts Institute of Technology. Earth Resources Laboratory, 1987)A variety of established and experimental geophysical techniques was used to measure the vertical distribution of fracture permeability in a 229-meter deep borehole penetrating schist and quartz monzonite near Mirror Lake, ...
