ERL Industry Consortia Technical Reports: Recent submissions

Now showing items 370-372 of 456

    • In Situ, Nonlinear Soil Response Applying an Active Source 

      Johnson, Paul; Toksoz, M. Nafi; Morgan, Frank Dale; Pearce, Fred (Massachusetts Institute of Technology. Earth Resources Laboratory, 2009)
      Soil sites have a profound effect on ground motion during earthquakes due to their low wave speeds, layered structure, and nonlinear constitutive relationship. Measurements of nonlinear soil response under natural ...

    • Focal Mechanism Determination using High Frequency, Full Waveform Information 

      Li, Junlun; Zhang, Haijiang; Kuleli, Huseyin Sadi; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2009)
      In this research, we use high frequency waveform information to determine the focal mechanisms of small local earthquakes at an oil reservoir. During the waveform inversion, we maximize both the phase and amplitude matching ...

    • Asymmetric source acoustic LWD for the improved formation shear velocity estimation 

      Chen, Tianrun; Wang, Bing; Zhu, Zhenya; Burns, Daniel R. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2009)
      Most acoustic LWD tools generate a single pure borehole mode (e.g., dipole or quadrupole) to estimate the formation shear velocity. We propose an approach where many borehole modes are generated and all the modes are ...