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Browsing Earth Resources Laboratory by Title

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  • Sarkar, Sudipta; Toksoz, M. Nafi; Burns, Daniel R. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2004)
    In this paper we study fluid flow in fractures using numerical simulation and address the challenging issue of hydraulic property characterization in fractures. The methodology is based on Computational Fluid Dynamics, ...
  • Brown, Stephen; Fang, Xinding (Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
    We present a methodology for relating seismic scattering signals from fractures to the fluid permeability field of the fracture network. The workflow is used to interpret seismic scattering signals for the reservoir ...
  • Sarkar, Sudipta; Toksoz, M. Nafi; Burns, Daniel R. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2002)
    The purpose of this study is to analyze fluid flow in fractured reservoirs. In most petroleum reservoirs, particularly carbonate reservoirs and some tight sands, natural fractures play a critical role in controlling fluid ...
  • Li, Junlun; Kuleli, Huseyin Sadi; Zhang, Haijiang; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2011-05-09)
    A new, high frequency, full waveform matching method is used to study the focal mechanisms of small, local earthquakes induced in an oil field, which are monitored by a sparse near-surface network and a deep borehole ...
  • 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 ...
  • Li, Junlun; Zhang, Haijiang; Kuleli, Huseyin Sadi; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2010)
    We present a new method using high frequency full waveform information to determine the focal mechanisms of small, local earthquakes monitored by a sparse surface network. During the waveform inversion, we maximize both ...
  • Huang, Xiaojun; Sinha, Bikash K.; Toksoz, M. Nafi; Burns, Daniel R. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1999)
    In situ formation stress directions and magnitudes are estimated by inverting the borehole flexural and Stoneley dispersions obtained from standard acoustic logging data (dipole and monopole logs). The underlying procedure ...
  • Cheng, N. Y.; Cheng, C. H.; Toksoz, M. N. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1993)
    In this paper we present a finite difference scheme for seismic wave propagation in a fluid-filled borehole in a transversely isotropic formation. The first-order hyperbolic differential equations are approximated ...
  • Bakku, Sudhish Kumar; Fehler, Michael; Burns, Daniel R. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
    Fractures contribute significantly to the permeability of a formation. It is important to understand the fracture distribution and fluid transmissivity. Though traditional well logs can image fractures intersecting the ...
  • Grandi, Samantha K.; Yuh, Sung; Willis, Mark E.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2006)
    We use 3D surface seismic data to determine the presence and the preferred orientation of fracture corridors in a field. The Scattering Index method is proving to be a robust tool for detecting and mapping fracture corridors. ...
  • Pearce, Fred; Burns, Daniel R.; Rao, Rama V. N.; Willis, Mark E.; Byun, Joongmoo (Massachusetts Institute of Technology. Earth Resources Laboratory, 2003)
    We use a 3-D finite difference numerical model to generate synthetic seismograms from a simple fractured reservoir containing evenly spaced, discrete, vertical fractures. The fractures are represented using a single column ...
  • Toksoz, M. Nafi; Guler, Fatih (Massachusetts Institute of Technology. Earth Resources Laboratory, 1988)
    The effects of fractures on full waveform acoustic logs are studied on the basis of field observations, available theoretical models, and a series of ultrasonic laboratory experiments. Results from diffusion models ...
  • Minsley, Burke J.; Willis, Mark E.; Krasovec, Mary L.; Burns, Daniel R.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2004-05-26)
    Amplitude versus offset (AVO) analysis of seismic reflection data has been a successful tool in describing changes in rock properties along a reflector. This method is extended to azimuthal AVO (AVOA) in order to characterize ...
  • Minsley, Burke J.; Burns, Daniel R.; Willis, Mark E. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2003)
    Ordinary least squares is used to investigate the ability to detect changes in physical properties using Amplitude Versus Offset (AVO) information collected from seismic data. In order to characterize vertically aligned ...
  • Michelet, Sophie; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2006)
    In 2003, a massive hydraulic fracturing experiment was carried out at the European Geothermal Hot Dry Rock site at Soultz-sous-Forêts, France. The two week injection of water generated a high level of microseismic activity. ...
  • Burns, Daniel R.; Willis, Mark E.; Vetri, Laura; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2007)
    Fractures scatter seismic energy and this energy can be analyzed to provide information about fracture direction and density. Laboratory and numerical (finite difference) models of fractures show that scattered energy ...
  • House, Nancy J.; Willis, Mark E.; Burns, Daniel R.; Lu, Rongrong; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2007)
    Tight gas reservoirs are problematic to produce, often requiring multiple stages of hydraulic fracturing in order to create connected pathways through which hydrocarbons may flow. In this paper, we propose a new methodology ...
  • Shemeta, Julie; House, Nancy J.; Willis, Mark E.; Willis, Kent M.; Burns, Daniel R. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2009)
    Natural and induced fractures provide the only means of production in tight gas sand reservoirs. The objective of this work is to locate and characterize natural and induced fractures from the analysis of scattered waves ...
  • Vetri, Laura; Willis, Mark E.; Rao, Rama V. N.; Burns, Daniel R.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2005)
    Discrete, vertically aligned fracture systems impart one or more notches in the spectral ratios of stacked reflected seismic traces. This apparent attenuation is due to the azimuth dependant scattering introduced by the ...
  • Paillet, Frederick L. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1983)
    Previously formulated scaling laws relating acoustic waveforms in boreholes to frequency, tool size and borehole diameter were investigated by repeated logging of the same test interval with different frequencies, and ...
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