A ray model for head waves in a fluid-filled borehole

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dc.contributor.advisorParks, Thomas W.en_US
dc.contributor.committeeMemberJohnson, Don H.en_US
dc.contributor.committeeMemberFigueiredo, Rui J. P. deen_US
dc.creatorScheibner, David Jamesen_US
dc.date.accessioned2018-12-18T21:25:11Zen_US
dc.date.available2018-12-18T21:25:11Zen_US
dc.date.issued1982en_US
dc.description.abstractA model, suggested by tbe ray expansion of Roever et al., is constructed to rapidly generate the compressional and shear refracted arrivals, known as head waves, received from a point source on the axis of an ideal fluid-filled borehole. An impulse response is derived, and its frequency characteristics are investigated. The waves are compared to those obtained by the real axis integration method of Tsang and Rader, which results in a complete waveform, including the modes as well as the refracted arrivals. The ray model gives accurate results for the compressional head wave. The shear region of the complete waveform contains strong modal interference, making it difficult to evaluate the quality of the ray model shear wave. A useful filter results from insight provided by the basic structure of the model. This filter can be used to estimate the borehole diameter or formation compressional velocity. It can also remove the second and later compressional arrivals, thus providing an accurate estimate of the source pulse and and a relatively uncorrupted vie of the initial arrival in the shear region.en_US
dc.format.digitalOriginreformatted digitalen_US
dc.format.extent75 ppen_US
dc.identifier.callnoTHESIS E.E. 1982 SCHEIBNERen_US
dc.identifier.citationScheibner, David James. "A ray model for head waves in a fluid-filled borehole." (1982) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/104543">https://hdl.handle.net/1911/104543</a>.en_US
dc.identifier.digitalRICE2178en_US
dc.identifier.urihttps://hdl.handle.net/1911/104543en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.titleA ray model for head waves in a fluid-filled boreholeen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentElectrical Engineeringen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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