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Browsing Earth Resources Laboratory Industry Consortia Technical Reports by Title

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Browsing Earth Resources Laboratory Industry Consortia Technical Reports by Title

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  • Experimental Studies Of Electroseismic Conversion In A Fluid-Saturated Porous Medium 
    Zhu, Zhenya; Haartsen, Matthijs W.; Toksoz, M. Nafi (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 
    Zhu, Zhenya; Rao, Rama V. N.; Burns, Daniel R.; Toksoz, M. Nafi (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 
    Zhu, Zhenya; Toksoz, M. Nafi; Burns, Daniel R. (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 Seismoelectric Measurements In A Borehole 
    Zhu, Zhenya; Haartsen, Matthijs W.; Toksoz, M. Nafi (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 
    Zhu, Zhenya; Toksoz, M. Nafi; Zhan, Xin (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 ...
  • An Experimental Study Of Seismoelectric Signals In Logging While Drilling 
    Zhan, Xin; Zhu, Zhenya; Chi, Shihong; Rao, Rama V. N.; Toksoz, M. Nafi (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 
    Zhu, Zhenya; Cheng, C. H.; Toksoz, M. N. (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 
    Minsley, Burke J.; Schweller, Will; Buttles, James; Grotzinger, John P. (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 
    Paillet, Frederick L.; Cheng, C. H.; Hsieh, Paul (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, ...
  • Experimental Verification of Acoustic Waveform and VSP Seismic Tube Wave Measurements of Fracture Permeability 
    Paillet, Frederick L.; Cheng, C. H.; Hsieh, Paul (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, ...
  • Fast Inversion Of Formation Permeability From Stoneley Wave Logs Using A Simplified Blot-Rosenbaum Model 
    Tang, X. M.; Cheng, C. H. (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 ...
  • A field expansions method for scattering by periodic multilayered media 
    Malcolm, Alison E. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2010)
    The interaction of acoustic and electromagnetic waves with periodic structures plays an important role in a wide range of problems of scientific and technological interest. This contribution focuses upon the robust and ...
  • Field Test of a Low-Frequency Sparker Source for Acoustic Waveform Logging 
    Paillet, Frederick L. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1984)
    Low-frequency acoustic-energy sources for waveform logging have important applications in: 1) Verifying theoretical calculations; 2) generating tube waves in large-diameter boreholes; and 3) providing larger sample volumes ...
  • Finite Difference Modeling of Attenuation and Anisotropy 
    Krasovec, Mary L.; Burns, Daniel R.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2003)
    A nite difference scheme which includes the effects of attenuation and anisotropy is tested for seismic reflection and borehole acoustic models. The validity of the scheme is established using a 3D homogenous isotropic ...
  • Finite Difference Modeling of Seismic Responses to Intersecting Fracture Sets 
    Chi, Shihong; Zhang, Yang; Campman, Xander; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2006)
    Fractured reservoir characterization is becoming increasingly important for the petroleum industry. Currentmethods for this task are developed based on effectivemedia theory, which assumes the cracks or fractures in a ...
  • Finite Difference Modelling Of Acoustic Logs In Vertically Heterogeneous Biot Solids 
    Stephen, Ralph A.; Cheng, N. Y.; Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1987)
    This paper discusses the results of tests carried out on a finite difference formulation of Biot's equations for wave propagation in saturated porous media which vary in range and depth (Stephen, 1987). A technique for ...
  • Finite-Difference Simulations of Time Reversed Acoustics in a Layered Earth Model 
    Lu, Rongrong; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2007)
    Traditionally an earthquake is located by using the arrival times of P and S phases. This uses only a limited portion of the information on a seismogram. A large part of the information carried by the waveform is not used. ...
  • Finite Difference Synthetic Acoustic Logs 
    Stephen, R. A.; Pardo-Casas, F.; Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1983)
    Synthetic seismograms of elastic wave propagation in a fluid-filled borehole were generated using both the finite difference technique and the discrete wavenumber summation technique. The latter is known to be accurate for ...
  • F-K Characteristics of the Seismic Response to a Set of Discrete Parallel Fractures 
    Vetri, Laura; Zhang, Yang; Campman, Xander; Grandi, Samantha K.; Chi, Shihong; Toksoz, M. Nafi; Willis, Mark E.; Burns, Daniel R. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2006)
    We model seismic wave propagation in a reservoir with discrete fracture zones using a finite difference scheme, which implements the Coates-Schoenberg formulation for fractured media. We study the variation of scattered ...
  • Flexural Waves In An Anisotropic Hard Formation Borehole Model 
    Zhu, Zhenya Y.; Cheng, Arthur C. H.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 1996)
    To investigate the propagation of flexural waves in a borehole surrounded by an azimuthally anisotropic hard formation, we made an ultrasonic borehole model of Delabole slate with very strong anisotropy. The axial and ...
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