Now showing items 142-144 of 456

    • Measurements Of Shear-Wave Azimuthal Anisotropy With Cross-Dipole Logs 

      Tao, Guo; Cheng, Arthur C. H.; Toksoz, M. N. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1997)
      Three methods for analyzing azimuthal anisotropy from cross-dipole logs are applied to data from the Powder River Basin in Wyoming. These techniques are based on the phenomena of flexural wave splitting in anisotropic ...
    • Cement Bond Evaluation Using Early Refracted Arrivals 

      Rao, Rama V.N.; Mandal, Batakrishna; Cheng, Arthur C. H.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 1997)
      The cement bond evaluation tool is a device used to examine the integrity of cement bonding to the casing. A conceptual tool operating between 80-200 kHz is considered here, with a transmitter and two receivers, oriented ...
    • Simulation Of Elastic Wave Propagation In Models Containing Irregular Interfaces Parameterized On Irregular Grids 

      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 ...