Now showing items 334-353 of 456

    • Quantitative tools for seismic stratigraphy and lithology characterization 

      Herrmann, Felix (Massachusetts Institute of Technology. Earth Resources Laboratory, 2001)
      Seismological images represent maps of the earth's structure. Apparent bandwidth limitation of seismic data prevents successful estimation of transition sharpness by the multiscale wavelet transform. We discuss the application ...
    • Radiation Patterns Of Compressional And Shear Transducers At The Surface Of An Elastic Half Space 

      Tang, X. M.; Zhu, Zhenya; Toksoz, M. N. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1992)
      The radiation patterns of an elastic wave field generated by circular plane compressional and shear transducers are derived using the method of steepest descent. These patterns contain both effects of the elastic half ...
    • Rapid 3-D Raytracing For Optimal Seismic Survey Design 

      Zhang, Jie; Lavely, Eugene; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 1997)
      A useful approach to optimal seismic survey design is to simulate the seismic response for a suite of a priori subsurface models and shot-receiver templates. The response can be used to evaluate many criteria such as ...
    • Real-time ensemble control with reduced-order modeling 

      Lin, Binghuai; McLaughlin, Dennis (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
      The control of spatially distributed systems is often complicated by significant uncertainty about system inputs, both time-varying exogenous inputs and time-invariant parameters. Spatial variations of uncertain parameters ...
    • Recursive Imaging with Multiply-Scattered Waves Using Partial Image Regularization: A North Sea Case Study 

      Malcolm, Alison E.; de Hoop, Maarten V.; Ursin, Bjorn (Massachusetts Institute of Technology. Earth Resources Laboratory, 2010)
      As more resources are directed toward reverse-time migration an accurate velocity model, including strong reflectors, is necessary to form a clear image of the subsurface. This is of particular importance in the vicinity ...
    • Redatumming Through a Salt Canopy – Another Salt Flank Imaging Strategy 

      Lu, Rongrong; Willis, Mark E.; Campman, Xander; Ajo-Franklin, Jonathan B.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2007)
      We describe a new short cut strategy to image the sediments and salt edge around a salt flank through an overburden salt canopy. We demonstrate its performance and capabilities on a synthetic acoustic seismic data from ...
    • Reflection Moveout Inversion For Horizontal Transverse Isotropy: Accuracy And Limitation 

      Al-Dajani, AbdulFattah; Alkhalifah, Tariq (Massachusetts Institute of Technology. Earth Resources Laboratory, 1998)
      Horizontal transverse isotropy (HTI) is the simplest azimuthally anisotropic model used to describe vertical fracturing in an isotropic matrix. Using the elliptical variation of P-wave normal-moveout (NMO) velocity with ...
    • Reflection Moveout Inversion In Azimuthally Anisotropic Media: Accuracy, Limitation, And Acquisition 

      AI-Dajani, AbdulFattah; Alkhalifah, Tariq; Morgan, Dale (Massachusetts Institute of Technology. Earth Resources Laboratory, 1999)
      Parameter estimation from elliptical variations in the normal-moveout (NMO) velocity in azimuthally anisotropic media is sensitive to the angular separation between the survey lines in 2D, or equivalently source-to-receiver ...
    • Registration-guided least-squares waveform inversion 

      Baek, Hyoungsu; Calandra, Henri; Demanet, Laurent (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013-01-15)
      Full waveform inversion with frequency sweeping cannot start from zero frequency because of the lack of low-frequency data, requiring a good starting model. We study a di fferent iterative scheme where the notion of proximity ...
    • Report Summary 

      Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1991)
      This report contains the results of work completed during the ninth year of the Full Waveform Acoustic Logging Consortium in the Earth Resources Laboratory at M.LT. During the past year, we have started the evolution ...
    • Report Summary 

      Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1988)
      This report contains the results of work completed during the sixth year of the Full Waveform Acoustic Logging Consortium in the Earth Resources Laboratory at M.LT. Over the last six years, our work have evolved from ...
    • Report Summary 

      Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1990)
      This report contains the results of work completed during the eighth year of the Full Waveform Acoustic Logging Consortium in the Earth Resources Laboratory at M.I.T. During the past year, we were able to accomplish many ...
    • Report Summary 

      Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1992)
      This report contains the results of work completed during the tenth year of the Borehole Acoustics and Logging Consortium in the Earth Resources Laboratory at M.l.T. This is the first year that the Consortium has been ...
    • Report Summary 

      Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1993)
      This report contains the results of work completed during the eleventh year of the Borehole Acoustics and Logging Consortium in the Earth Resources Laboratory at M.LT. We continued our trend toward more general borehole ...
    • Report Summary 

      Toksoz, M. N.; Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1986)
      This report contains the results of work completed during the fourth year of the Full Waveform Acoustic Logging Consortium in the Earth Resources Laboratory at M.LT. This is the first year of the second phase of the ...
    • Report Summary 

      Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1989)
      This report contains the results of work completed during the seventh year of the Full Waveform Acoustic Logging Consortium in the Earth Resources Laboratory at M.LT. During the past year, we have been concentrating on ...
    • Report Summary 

      Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1994)
      This report contains the results of work completed during the twelfth year of the Borehole Acoustics and Logging Consortium in the Earth Resources Laboratory at M.LT. This year we have achieved one of our major goals in ...
    • Report Summary 

      Toksoz, M. N.; Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1987)
      This report contains the results ot work completed during the fifth year of the Full Waveform Acoustic Logging Consortium in the Earth Resources Laboratory at M.l.T. During this past year, the emphasis in our research ...
    • Reservoir Delineation Research 

      Gibson, Richard L., Jr. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1996)
      This report describes work performed by the Reservoir Delineation Consortium during the past year. We have made progress in the areas of theoretical analysis of wave propagation, data analysis, and significant field work ...
    • Reservoir fracture characterizations from seismic scattered waves 

      Fang, Xinding; Fehler, Michael; Zhu, Zhenya; Zheng, Yingcai; Burns, Daniel R. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
      The measurements of fracture parameters, such as fracture orientation, fracture density and fracture compliance, in a reservoir is very important for field development and exploration. Traditional seismic methods for ...