Advanced Search
DSpace@MIT

Browsing Earth Resources Laboratory by Title

Research and Teaching Output of the MIT Community

Browsing Earth Resources Laboratory by Title

Sort by: Order: Results:

  • Pearce, Frederick Douglas (Massachusetts Institute of Technology. Earth Resources Laboratory, 2003-09)
    We use a 3-D finite difference numerical model to generate synthetic seismograms from a simple fractured reservoir containing evenly-spaced, discrete, vertical fracture zones. The fracture zones are represented using a ...
  • Toksoz, M. N.; Cheng, C. H.; Willis, M. E. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1983)
    The propagation of seismic waves in an open borehole is reviewed. The principal wave types are the refracted P and S waves and the two guided waves - pseudo-Rayleigh and Stoneley. The dispersion properties of the guided ...
  • Zhu, Zhenya; Toksoz, M. Nafi (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 ...
  • Zhu, Zhenya; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 1998)
    The seismoelectric logging method is based on measuring the electric field generated by seismic waves in a fluid-filled borehole. Two kinds of electromagnetic (EM) fields can be generated within the formation and at the ...
  • Schakel, Menne D.; Zhu, Zhenya; Toksoz, M. Nafi (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 ...
  • Krasovec, Mary L.; Rodi, William L.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 1998)
    The variation in seismic P to P reflection amplitude with offset (AVO) caused by a system of fractures embedded in an isotropic background is investigated. Additionally. a sensitivity analysis of AVO parameters with ...
  • Fang, Xinding; Fehler, Michael; Chen, Tianrun; Burns, Daniel R. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2010)
    The understanding of seismic scattering of a finite fracture is very important in reservoir fracture characterizations, but the analytical solution of this problem is not available. Thus, in this paper, we present an ...
  • Sierra, Jesus; Queen, John H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1998)
    We present an original method to estimate local shear wave birefringence properties for 3-D surface P to S converted waves. To accomplish this we approach the problem in reverse VSP (RVSP), and we show that they are ...
  • Toksoz, M. Nafi; Al-Dajani, AbdulFattah (Massachusetts Institute of Technology. Earth Resources Laboratory, 2000)
    The presence of azimuthal anisotropy causes shear wave propagation to split into fast and slow shear waves. The most common azimuthally anisotropic models used to describe fractured reservoirs are transverse isotropy ...
  • Zhang, Jie; Turpening, Roger; Chauvelier, Chantal; Morgan, F. Dale; Toksoz, M. Nafi; Queen, John; Cox, Dale (Massachusetts Institute of Technology. Earth Resources Laboratory, 1997)
    We conducted a P- and S-wave crosswell survey with Conoco's orbital vibrator source and three-component receivers at M.LT.'s Michigan Test Site. The receiver and source wells bracket a known oil reservoir. Applying a ...
  • Chi, Shihong; Campman, Xander (Massachusetts Institute of Technology. Earth Resources Laboratory, 2005)
    Wave propagation and scattering in fractured formations have been modeled with finite-difference programs and the use of equivalent anisotropic media description of discrete fractures. This type of fracture description ...
  • Zhao, Xiaomin; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 1992)
    This paper presents some new results of theoretical modeling on permeability anisotropy in heterogeneous porous media. It is shown that the lineation of heterogeneities results ·in permeability anisotropy. However, to ...
  • Cheng, C. H.; Foley, Jack (Massachusetts Institute of Technology. Earth Resources Laboratory, 1991)
    The method of simulated annealing is introduced to obtain relative moveouts between different depths from an iso-offset section. This method has been shown to be more consistent than conventional picks based on peaks, ...
  • Hu, Hengshan; Wang, Kexie; Wang, Jingnong (Massachusetts Institute of Technology. Earth Resources Laboratory, 2000)
    When an acoustic point source located on the borehole axis emits an acoustic wave, an electric field, as well as an acoustic field, is generated in the porous formation around the borehole due to an electrokinetic effect. ...
  • Nolte, Bertram (Massachusetts Institute of Technology. Earth Resources Laboratory, 1997)
    Thus study demonstrates the advantages of a recently-developed irregular-grid modeling technique (Nolte, 1996). This technique can model irregular interfaces more accurately than a standard regular-grid finite-difference ...
  • Briggs, Victoria; Huang, Xiaojun; Rao, Rama V. N.; Burns, Daniel R. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2002)
    This paper presents an inversion algorithm for obtaining azimuthal angle and borehole flexural wave dispersion in an anisotropic formation. The technique constructs an objective function that can be minimized using standard ...
  • Briggs, Victoria; Rao, Rama V. N.; Burns, Daniel R. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2003)
    A method to jointly invert for azimuthal angle and dispersion relations from cross-dipole data is presented. Dispersion curves from the joint inversion are compared to both Prony’s method and a simple back propagation ...
  • Kane, Jonathan; Rodi, William; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2001)
    Least squares deconvolution is a method used to sharpen tomographic images of the earth by undoing the bandlimiting effects imposed by a seismic wavelet. Kriging is a method used by geoscientists to extrapolate and interpolate ...
  • Lyons, William J.; Herrmann, Felix; Grotzinger, John P. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2001)
    In this work, we test an amplitude-independent method of seisimic data analysis designed to extract lithologic information about stratigraphic horizons. We apply the method of singularity characterization in an attempt to ...
  • Zhao, Xiaomin; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 1994)
    Solute mass transport in porous media is strongly correlated with pore fluid flow. The analysis of solute transport is an effective means for studying medium heterogeneities. In this study, we discuss the effects of ...
MIT-Mirage