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Research and Teaching Output of the MIT Community

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Browsing Earth Resources Laboratory by Title

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  • Grandi, Samantha; Rao, Rama V. N.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2002)
    In this paper, we present a modelling of the in-situ stress state associated with the severe hole enlargement of a wellbore. Geomechanical information is relevant to assure wellbore stability, i.e., to prevent damages ...
  • Paillet, F . L. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1988)
    A full suite of geophysical logs, including nuclear, electric, acoustic transit-time, acoustic waveform, and acoustic televiewer logs, and high-resolution flowmeter measurements have been used to investigate the lithologic ...
  • Kane, Jonathan; Al-Moqbel, Abdulrahman; Rodi, William; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2002)
    We present a method for combining seismic deconvolution and geostatistical interpolation. Both problems are posed as a single joint inverse problem in the maximum likelihood framework. Joint inversion allows for well ...
  • Kane, Jonathan; Rodi, William; Herrmann, Felix; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 1999)
    Information about reservoir properties usually comes from two sources: seismic data and well logs. The former provide an indirect, low resolution image of rock velocity and density. The latter provide direct, high ...
  • Ellefsen, K. J.; Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1989)
    A method of calculating dispersion curves for guided waves in slight, azimuthally anisotropic formations is developed with perturbation theory. The fluid is assumed to be inviscid, the formation perfectly elastic and ...
  • 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 ...
  • 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 ...
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