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mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Wettability of porous media by nuclear magnetic resonance relaxation methods
  name:
    name part: Hsu, Wen-Fu.
    role:
      role term: creator
  name:
    name part: Flumerfelt, Raymond W.
    role:
      role term: degree supervisor.
  name:
    name part: Haw, James F.
    role:
      role term: degree committee member.
  name:
    name part: Ploehn, Harry J.
    role:
      role term: degree committee member.
  name:
    name part: Slattery, John C.
    role:
      role term: degree committee member.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses.
  origin info:
    place:
      place term: xx
    date issued: 1994
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xi, 148 leaves : illustrations ; 28 cm
  abstract: Wettability is a major factor which influences the distribution of multiphase fluids in reservoir rocks. However, the conventional methods for determining wetting characteristics of reservoir rocks are difficult and time-consuming. NMR (nuclear magnetic resonance) relaxation time measurements provide a quantitative, fast, and relatively easy technique for determining rock wettabilities. The use o f NMR relaxation time methods to characterize wettability of porous media is based on the observation that the surface of porous media significantly influences the relaxation times of fluids in the pores. NMR relaxation measurements o f Tx (spin-lattice relaxation time in laboratory) and Tip (spin-lattice relaxation time in the rotating frame) for H2O and D2 O in bead packs are initially investigated in this study. The apparent contradictory observations of previous investigators are explained. Both H2 O and D2 O have shorter relaxation times in water-wet porous m edia than in oil-wet m edia in the absence o f magnetic impurities. Deuteron relaxation times are less affected by magnetic impurities, but are also less sensitive to the surface wettability changes. The determination of fractional wettability by NMR relaxation time methods are also demonstrated. Carbonate core samples are treated to create preferentially water-wet and preferentially oil-wet surfaces. NMR relaxation time measurements of such cores show good agreement with the results from the Amott/USBM methods. The pore level wetdng distribution of core samples are also obtained using NMR relaxation techniques. A new approach to esdmate the surface energy of a non-polar solid surface from NMR relaxation time methods is developed. This method is based on proton Tlp measurements o f a series o f homologous hydrocarbons with different surface tensions in bead packs. The solid surface energy is also compared with the Zisman method which uses contact angle measurements to obtain a solid surface energy. The results sho…
  note: by Wen-Fu Hsu.
  note: "Major subject: Chemical Engineering."
  note: Vita.
  note: Ph. D. Texas A & M University 1994
  note: Includes bibliographical references.
  subject:
    topic: Major chemical engineering
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-1551603
  identifier: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-1551603
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  record info:
    record content source: TXA
    record creation date: 960515
    record change date: 20220103134931.0
    record identifier: in00001300447
    language of cataloging:
      language term: eng