ERL Industry Consortia Technical Reports: Recent submissions

Now showing items 313-315 of 456

    • Seismic Waves in a Borehole - A Review 

      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 ...

    • Determination of Shear Wave Velocity and Attenuation From Waveforms in Low Velocity Formations 

      Toksoz, M. Nafi; Wilkens, R. H.; Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1984)
      In boreholes where formation shear velocity is lower than borehole fluid velocity neither refracted shear waves nor pseudo-Rayleigh waves can propagate. When frequency response of the sonde does not extend to low frequencies ...

    • Detection of Open Fractures with Vertical Seismic Profiling 

      Beydoun, W. B.; Cheng, C. H.; Toksoz, M. N. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1984-01-01)
      In Vertical Seismic Profiling surveys tube waves are generated by compressional waves impinging on subsurface fractures or permeable zones. The problem of generation of these waves by a non-normal incident P wave for an ...