MIT Libraries homeMIT Libraries logoDSpace@MIT

MIT
Search 
  • DSpace@MIT Home
  • Earth Resources Laboratory
  • Search
  • DSpace@MIT Home
  • Earth Resources Laboratory
  • Search
JavaScript is disabled for your browser. Some features of this site may not work without it.

Search

Show Advanced FiltersHide Advanced Filters

Filters

Use filters to refine the search results.

Now showing items 1-10 of 19

  • Sort Options:
  • Relevance
  • Title Asc
  • Title Desc
  • Issue Date Asc
  • Issue Date Desc
  • Results Per Page:
  • 5
  • 10
  • 20
  • 40
  • 60
  • 80
  • 100
Thumbnail

Fracture Spacing and Orientation Estimation from Spectral Analyses of Azimuth Stacks 

Willis, Mark E.; Rao, Rama V. N.; Burns, Daniel R.; Toksoz, M. Nafi; Vetri, Laura (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 ...
Thumbnail

Dispersive Wave Analysis – Method and Applications 

Rao, Rama V. N.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2005)
A technique for estimating the dispersion characteristics of propagating waves as measured by an array is detailed. The technique consists of bandpass filtering the data through a filterbank and then processing the filtered ...
Thumbnail

An Experimental Study Of Seismoelectric Signals In Logging While Drilling 

Zhan, Xin; Zhu, Zhenya; Chi, Shihong; Rao, Rama V. N.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2005)
Acoustic logging while drilling (LWD) may be complicated because of contamination by waves propagating along the drill collar (the tool waves). In this paper we propose a new method for separating tool waves from the true ...
Thumbnail

Simultaneous Inversion of cross-dipole acoustic waveforms in anisotropic media for azimuthal angle and dispersion of fast and slow shear waves 

Briggs, Victoria; Rao, Rama V. N.; Burns, Daniel R. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2003)
A method to jointly invert for azimuthal angle and dispersion relations from cross-dipole data is presented. Dispersion curves from the joint inversion are compared to both Prony’s method and a simple back propagation ...
Thumbnail

Measured radiation patterns of the scale model dipole tool 

Lu, Rongrong; Rao, Rama V. N.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2003)
The sound field of finite dipole acoustic transducers in a steel tool was investigated and their horizontal by measuring their vertical radiation patterns in water at two different frequencies. Measurements were also made ...
Thumbnail

Fracture Density Estimation Using Spectral Analysis of Reservoir Reflections: A Numerical Modeling Approach 

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 ...
Thumbnail

Higher Order Modes in Acoustic Logging While Drilling 

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 ...
Thumbnail

Effects of source mismatch on multipole Logging 

Byun, Joongmoo; Toksoz, M. Nafi; Rao, Rama V. N. (Massachusetts Institute of Technology. Earth Resources Laboratory, 2004)
The effects of mismatched multipole sources were investigated. Multipole sources considered here are those that they are constructed of monopoles with appropriate sign combination. To simulate mismatched dipole and ...
Thumbnail

Spatial Orientation And Distribution Of Reservoir Fractures From Scattered Seismic Energy 

Willis, Mark E.; Rao, Rama V. N.; Burns, Daniel R.; Byun, Joongmoo; Vetri, Laura (Massachusetts Institute of Technology. Earth Resources Laboratory, 2004)
Expanded details and additional results are presented using a new method (Willis et al, 2003) for determining the reflection and scattering characteristics of seismic energy from subsurface fractured formations. The method ...
Thumbnail

A comparison of LWD and wireline dipole sonic data 

Briggs, Victoria; Rao, Rama V. N.; Grandi, Samantha K.; Burns, Daniel R.; Chi, Shihong (Massachusetts Institute of Technology. Earth Resources Laboratory, 2004)
Data measured by both wireline and LWD tools in the same borehole are compared. Discrepancies in shear velocities as calculated from the data are on average around 5% and discrepancies between compressional velocities are ...
  • 1
  • 2

Browse

All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CommunityBy Issue DateAuthorsTitlesSubjects

My Account

Login

Discover

Author
Rao, Rama V. N. (19)
Toksoz, M. Nafi (13)Burns, Daniel R. (12)Willis, Mark E. (6)Chi, Shihong (4)Vetri, Laura (4)Zhu, Zhenya (4)Briggs, Victoria (3)Byun, Joongmoo (3)Grandi, Samantha K. (2)... View MoreDate Issued2003 (5)2005 (5)2004 (4)2002 (3)2006 (2)Has File(s)Yes (19)

Statistics

OA StatisticsStatistics by CountryStatistics by Department
MIT Libraries homeMIT Libraries logo

MIT Libraries navigation

HomeSearchHours & locationsBorrow & requestResearch supportAbout the Libraries
MIT
Massachusetts Institute of Technology77 Massachusetts AvenueCambridge MA 02139-4307
All items in DSpace@MIT are protected by original copyright, with all rights reserved, unless otherwise indicated. Notify us about copyright concerns.