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Browsing Earth Resources Laboratory Industry Consortia Technical Reports by Title

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Browsing Earth Resources Laboratory Industry Consortia Technical Reports by Title

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  • Chi, Shihong; Zhu, Zhenya; Rao, Rama V. N.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2005)
    In multipole acoustic logging while drilling (LWD), the fundamental modes dominate recorded waveforms. Higher order modes may also appear and complicate the processing of LWD data. In dipole LWD measurements, the dipole ...
  • Ellefsen, K. J.; Burns, D. R.; Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1991)
    A new processing method, which we developed for the guided waves generated during acoustic logging, accurately estimates the wavenumber when only a few seismograms are available or when the seismograms are irregularly ...
  • House, N. J.; Shemeta, J.; Willis, Mark E.; Willis, Kent M.; Burns, Daniel R. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2008)
    The ability to produce from low permeability, tight gas reservoirs is directly tied to the ability to repetitively perform successful hydraulic fracturing in a series of closely spaced wells. The key question is whether ...
  • Li, Yingping; Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1995)
    The hydraulic fracturing technique has become an important tool in the enhancement of hydrocarbons recovery, geothermal energy extraction, and solid waste disposal. The characterization of geometry parameters and growth ...
  • Li, Yingping; Zhu, Xianhuai; Cheng, Arthur C. H.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 1996)
    Hydraulic fracturing is a useful tool for enhancing gas and oil production. High-resolution seismic imaging of the fracture geometry and fracture growth process is the key in determining optimal spacing and location of ...
  • Lu, Rongrong; Willis, Mark E.; Campman, Xander; Ajo-Franklin, Jonathan B.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2006)
    In this paper we define the theory and basic principles to move (redatum) the surface shots from a walk away VSP to be as if they had been located in the borehole. We will refer to this theory using several of the terms ...
  • Concha, Diego Alvaro Pinero (Massachusetts Institute of Technology. Earth Resources Laboratory, 2010-06)
    We applied the double-difference tomography method to image the P and S-wave velocity structure of the European Hot Dry Rock geothermal reservoir (also known as the Soultz Enhanced Geothermal System) at Soultz-sous-Forets, ...
  • Krasovec, Mary; Turpening, Roger; Paulsson, Bjorn; Haldorsen, Jakob; Coates, Richard; Greaves, Robert (Massachusetts Institute of Technology. Earth Resources Laboratory, 2000)
    We present the analysis of a reverse vertical seismic profile (RVSP) acquired over a pinnacle reef in the northern Michigan reef trend. The survey exhibited two features of note: (1) a new, strong, downhole vertical ...
  • Poliannikov, Oleg V.; Willis, Mark E. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2008-06-16)
    Under certain theoretical assumptions, the theory of seismic interferometry allows the construction of artificial (or virtual) sources and receivers at the locations of receivers in a physical experiment. This is done ...
  • Ay, Erkan; Song, Fuxian; Kuleli, Huseyin Sadi; Toksoz, M. Nafi; Zhang, Haijiang (Massachusetts Institute of Technology. Earth Resources Laboratory, 2010)
    The ability to detect small microearthquakes and identify their P and S phase arrivals is a key issue in hydrofracture downhole monitoring because of the low signal-to-noise ratios. We apply an array-based waveform ...
  • Cornish, Bruce; Quirein, John; Ay, Erkan; Pei, Donghong; Zannoni, Steve; Song, Fuxian; Kuleli, Huseyin Sadi; Todreas, M. Nafi; Zhang, Haijiang (Massachusetts Institute of Technology. Earth Resources Laboratory, 2009)
    The ability to detect small microseismic events and identify their P and S phase arrivals is a key issue in hydraulic fracture monitoring because of the low signal-to-noise ratios. We propose a array-based waveform ...
  • 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 ...
  • Chen, Wei; Burns, Daniel R.; Tang, Xiao-ming (Massachusetts Institute of Technology. Earth Resources Laboratory, 1999)
    Permeability estimates from acoustic logs (Stoneley waves) and NMR logs were compared using data from a geologic section consisting of sandstone and shale beds. The permeability results show very good correlation for ...
  • Grandi, Samantha K.; Rao, Rama V. N.; Huang, Xiaojun; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2003)
    In this paper we obtain in-situ stress information based on two methods. The first one consists in matching borehole deformations to the modelling of linear poroelasticity equations around a hole in a plate that is subjected ...
  • Poliannikov, Oleg V.; Willis, Mark E.; Mashele, Bongani Jabulani (Massachusetts Institute of Technology. Earth Resources Laboratory, 2009-05-31)
    Seismic interferometry is a method of obtaining a virtual shot gather from a collection of actual shot gathers. The set of traces corresponding to multiple actual shots recorded at two receivers is used to synthesize a ...
  • Willis, Mark E.; Poliannikov, Oleg V. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2010-04-26)
    Seismic interferometry is a method of obtaining a virtual shot gather from a collection of physical shot gathers. The set of traces corresponding to two common receiver gathers from many physical shots is used to synthesize ...
  • Malcolm, Alison E.; de Hoop, Maarten V. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2010)
    It is well known that reverse-time migration is capable of correctly imaging multiply scattered energy. To do this, one of the interfaces from which the waves scatter must be included in the background velocity model. ...
  • Alshammery, Hafiz J.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 1998)
    The goal of this paper is to study the accuracy of estimating the Quality Factor (Q) from ultrasonic pre-stack P-wave reflection data. Q is estimated by applying the spectral ratio method to the top and bottom reflections ...
  • Cheng, N. Y.; Cheng, C. H.; Toksoz, M. N. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1990)
    The in situ permeability of a formation is obtained by the inversion of Stoneley wave phase velocity and attenuation, which are evaluated by applying the Extended Prony's method to the array sonic logging data. The Maximum ...
  • Tang, Xiaoming; Chi, Shihong; Zhu, Zhenya (Massachusetts Institute of Technology. Earth Resources Laboratory, 2006)
    Deepwater reservoirs use highly deviated wells to reduce cost and enhance hydrocarbon recovery. Due to the strong anisotropic nature of many of the marine sediments, anisotropic seismic imaging and interpretation can improve ...
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