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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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  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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, ...
  • 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, ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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. ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Edie, Margaret S.; Olson, John F.; Burns, Daniel R.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 1999)
    We use nuclear magnetic resonance (NMR) imaging to obtain a three-dimensional image of the pore structure in a limestone core, 4.5 mm in diameter and 10 mm in length, with a resolution of 40 μm. This image is converted ...
  • Sarkar, Sudipta; Toksoz, M. Nafi; Burns, Daniel R. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2004)
    In this paper we study fluid flow in fractures using numerical simulation and address the challenging issue of hydraulic property characterization in fractures. The methodology is based on Computational Fluid Dynamics, ...
  • Sarkar, Sudipta; Toksoz, M. Nafi; Burns, Daniel R. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2002)
    The purpose of this study is to analyze fluid flow in fractured reservoirs. In most petroleum reservoirs, particularly carbonate reservoirs and some tight sands, natural fractures play a critical role in controlling fluid ...
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