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Browsing Earth Resources Laboratory by Issue Date

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Browsing Earth Resources Laboratory by Issue Date

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  • 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 ...
  • Song, Fuxian; Warpinski, Norm R.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    Microseismic moment tensor (MT) contains important information on the reservoir and fracturing mechanisms. Difficulties arise when attempting to retrieve complete MT with conventional amplitude inversion methods if only ...
  • Massachusetts Institute of Technology. Earth Resources Laboratory (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
  • Liu, Yuwei; Fehler, Michael; Fang, Xinding; Liu, Cai (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    When fractures are vertical, aligned and their dimensions are small relative to the seismic wavelength, the medium can be considered to be an equivalent Horizontal Transverse Isotropic (HTI) medium. However, geophysical ...
  • Poliannikov, Oleg V.; Prange, Michael; Malcolm, Alison E.; Djikpesse, Hugues (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    We study the problem of determining an unknown microseismic event location relative to previously located events using a single monitoring array in a monitoring well. We show that using the available information about the ...
  • Song, Fuxian; Warpinski, Norm R.; Toksoz, M. Nafi; Kuleli, Huseyin Sadi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    Microseismic monitoring has proven to be an invaluable tool for optimizing hydraulic fracturing stimulations and monitoring reservoir changes. The signal to noise ratio (SNR) of the recorded microseismic data varies ...
  • Kang, Peter K.; Zheng, Yingcai; Fang, Xinding; Wojcik, Rafal; McLaughlin, Dennis; Brown, Stephen; Fehler, Michael; Burns, Daniel R.; Juanes, Ruben (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    Traditionally, seismic interpretation is performed without any account of the flow behavior. Here, we present a methodology to characterize fractured geologic media by integrating flow and seismic data. The key element of ...
  • Fang, Xinding; Fehler, Michael; Cheng, Arthur (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    Formation elastic properties near a borehole may be altered from their original state due to the stress concentration around the borehole. This could lead to a biased estimation of formation elastic properties measured ...
  • Leinonen, Matti; Hewett, Russell J.; Zhang, Xiangxiong; Ying, Lexing; Demanet, Laurent (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    Wave atoms are a low-redundancy alternative to curvelets, suitable for high-dimensional seismic data processing. This abstract extends the wave atom orthobasis construction to 3D, 4D, and 5D Cartesian arrays, and parallelizes ...
  • Li, Jingshuang; Fehler, Michael; Yang, Dinghui; Huang, Xueyuan (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    The finite difference method has been widely used in seismic modeling and reverse time migration. However, it generally has two issues: large computational cost and numerical dispersion. Recently, a nearly-analytic discrete ...
  • Melo, Gabriela; Malcolm, Alison E.; Mikesell, Dylan; van Wijk, Kasper (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    Seismic interferometry (SI) is a technique used to estimate the Green’s function (GF) between two receiver locations, as if there were a source at one of the receiver locations. However, in many applications, the requirements ...
  • Poliannikov, Oleg V.; Prange, Michael; Malcolm, Alison E.; Djikpesse, Hugues (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    We study the problem of the joint location of seismic events using an array of receivers. We show that locating multiple seismic events simultaneously is advantageous compared to the more traditional approaches of locating ...
  • Richardson, Alan; Malcolm, Alison E. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    We propose using the forward propagated source wave to create synthetic receiver data on the surfaces of the computational domain where real receiver data is not available as a means of exploiting known information about ...
  • Shabelansky, Andrey Hanan; Malcolm, Alison E.; Fehler, Michael; Shang, Xuefeng; Rodi, William L. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    Multi-component elastic seismic data collected at large offsets have the potential to be used in seismic imaging and velocity analysis. In this study, we present an approach for converted-phase elastic-transmission migration ...
  • Melo, Gabriela; Malcolm, Alison E.; Poliannikov, Oleg V.; Fehler, Michael (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    In many reservoirs, an increase in permeability and conductivity is achieved by hydraulic fracturing/stimulations which open cracks and fractures that then act as pathways for fluids to navigate in the subsurface. Mapping, ...
  • Al Muhaidib, Abdulaziz; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    A perturbation method for elastic waves and numerical forward modeling are used to calculate the effects of seismic wave scattering from arbitrary shape shallow subsurface heterogeneities. Wave propagation is simulated ...
  • Baek, Hyoungsu; Calandra, Henri; Demanet, Laurent (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    We analyze the correlation focusing objective functional introduced by van Leeuwen and Mulder to avoid the cycle-skipping problem in full waveform inversion. While some encouraging numerical experiments were reported in ...
  • Fang, Xinding; Shang, Xuefeng; Fehler, Michael (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    We study the sensitivity of seismic waves to changes in the fracture normal and tangential compliances by analyzing the fracture sensitivity wave equation, which is derived by differentiating the elastic wave equation with ...
  • Yang, Di; Fehler, Michael; Malcolm, Alison E.; Liu, Faqi; Morton, Scott (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    Changes in reservoir properties resulting from extracting hydrocarbons and injecting fluid are critical to optimize production. These properties can be characterized using waveform inversions of time-lapse seismic data. ...
  • Willemsen, Lucas Abraham; Malcolm, Alison E.; Hewett, Russell J. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
    In this abstract we present a method that allows arbitrary elements of the approximate Hessian to be estimated simultaneously. Preliminary theoretical and numerical investigations suggest that the number of forward models ...
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