Now showing items 1-8 of 8

    • Characterizing Surface Roughness From Pressure-Joint Closure Measurements Using Inversion Procedure 

      Zhao, Xiaomin; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 1991)
      An inversion procedure has been formulated to estimate the surface roughness of a joint (fracture) from the measured pressure-closure data. A gamma distribution for the local minima (or maxima) on a topography profile ...
    • Dynamic Fluid Flow In Heterogeneous Porous Media And Through A Single Fracture With Rough Surfaces 

      Zhao, Xiaomin; Cheng, C. H.; Tang, Xiaoming; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 1992)
      This study investigates the frequency-dependence of fluid flow in heterogeneous porous media using the theory of dynamic permeability and a finite-difference method. Given a permeability distribution, the dynamic ...
    • Modeling Fluid Flow In Heterogeneous And Anisotropic Porous Media 

      Zhao, Xiaomin; Toksoz, M. Naft (Massachusetts Institute of Technology. Earth Resources Laboratory, 1991)
      Permeability distribution in reservoirs is very important for the flow of water or oil and gas. In this study, the effects of various heterogeneous permeability distributions on the flow field are simulated using the finite ...
    • A Short Note On Permeability Anisotropy In Heterogeneous Porous Media 

      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 ...
    • Solute Transport In Heterogeneous Porous Media 

      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 ...
    • Stoneley Wave Propagation Across Borehole Permeability Heterogeneities 

      Zhao, Xiaomin; Toksoz, M. N.; Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1994)
      An important application of borehole acoustic logging is the determination of formation permeability using Stoneley waves. Heterogeneous permeable structures, such as fractures, sand-shale sequences, etc., are commonly ...
    • Stoneley Wave Propagation In Heterogeneous Permeable Porous Formations 

      Zhao, Xiaomin; Toksoz, M. N.; Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1993)
      The propagation of borehole Stoneley waves is strongly correlated with permeability of the formation. Previous studies primarily focused on the situation where the permeability is homogeneously distributed in the formation. ...
    • Transient Fluid Flow In Heterogeneous Porous Media 

      Zhao, Xiaomin; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 1992)
      A stable Alternating Direction Implicit finite-difference algorithm is used to model transient fluid flow in heterogeneous porous media. In connection with the laboratory system for pressure transient testing of core ...