Advanced Search
DSpace@MIT

Browsing ERL Industry Consortia Technical Reports by Title

Research and Teaching Output of the MIT Community

Browsing ERL Industry Consortia Technical Reports by Title

Sort by: Order: Results:

  • Toksoz, M. N.; Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1985)
    This report contains results from the third year of the Full Waveform Acoustic Logging Consortium and rock physics studies at M.J.T. This year marks the completion of the first phase of the project which has been directed ...
  • Toksoz, M. Nafi; Cheng, C. H.; Garcia, Gilles (Massachusetts Institute of Technology. Earth Resources Laboratory, 1984)
    We have now completed the second year of the Full Waveform Acoustic Logging Consortium. During these two years, we have developed a good understanding of seismic wave propagation in a borehole through both theoretical ...
  • Garcia, G. H.; Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1985)
    This paper presents the full waveform acoustic log inversion problem for a multisource - multireceiver tool logging a cylindrical fluid-filled borehole. The problem is formulated in the frequency-depth domain. A priori ...
  • Song, Fuxian; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2011)
    Downhole microseismics has gained increasing popularity in recent years as a way to characterize hydraulic fracturing and to estimate in-situ stress state. Conventional approaches only utilize part of the information ...
  • 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 ...
  • 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 ...
  • Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1987)
    We present an indirect method of determining shear wave velocities from full waveform acoustic logs based on the inversion of the spectral ratio of the P-wave trains at two source-receiver separations. This method ...
  • Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1987)
    We present an indirect method of determining shear wave velocities from full waveform acoustic logs based on the inversion of the spectral ratio of the P-wave trains at two source-receiver separations. This method ...
  • Cheng, C. H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 1987)
    We present an indirect method of determining shear wave velocities from full waveform acoustic logs based on the inversion of the spectral ratio of the P-wave trains at two source-receiver separations. This method ...
  • Bouchon, Michel; Schmitt, Denis (Massachusetts Institute of Technology. Earth Resources Laboratory, 1988)
    We present a boundary integral equation formulation for the problem of wave propagation in a borehole of irregular cross-section. The method consists in representing the wave field diffracted at the borehole-rock interface ...
  • 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 ...
  • Brown, Stephen (Massachusetts Institute of Technology. Earth Resources Laboratory, 2011)
    4-D seismic techniques rely on measuring changes in velocity over time in order to detect changes during activities such as CO[subscript 2] flooding and storage in a reservoir. Wang et al. [1998] detail a laboratory study ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Seher, T.; Rondenay, Stephane; Djikpesse, H. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2011)
    Hydraulic fracturing involves the injection of a fluid to fracture oil and gas reservoirs, and thus increase their permeability. The process creates numerous microseismic events, which can be used to monitor subsurface ...
MIT-Mirage