rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Phosphonic-Based HF Acid
    sub title: Interactions With Clay Minerals and Flow in Sandstone Cores
  name:
    name part: Zhou, Lijun
    role:
      role term: creator
    role:
      role term: author.
  name:
    name part: Nasr-El-Din, Hisham
    role:
      role term: thesis advisor.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2015
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: remote
    extent: 1 online resource.
  abstract: Regular mud acid, which is composed of HCl and HF, has been extensively used to remove the formation damage in sandstone reservoirs; however, many problems may occur during stimulation treatments with this acid. To overcome many of these drawbacks, phosphonic-based HF acid systems (HF and a phosphonic acid) have been used as an alternative to mud acid. However, very limited research has been performed to investigate the interactions of phosphonic-based acid systems with clay minerals in sandstone reservoirs. Phosphonic-based acid has been used in the field. Reactions of this acid with clays and its propagation in sandstone cores have not been examined previously. Therefore, the main objectives of this study are to: 1) investigate the reaction of phosphonic-based acid systems with clay minerals; 2) evaluate the effect of acid concentration, temperature, and reaction time on the acid performance; 3) determine the nature of precipitate that might form during the reaction of this acid system with various clay minerals, and 4) conduct coreflood tests to determine the impact of this acid system on core permeability. In this study, a phosphonic-based HF acid system with two HF concentrations (1.5 and 3 wt %) was used to evaluate the solubility of various clay minerals (kaolinite, bentonite, chlorite, and illite) as a function of time and temperature. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were used to identify the reaction products. The pH of the solutions was measured using a HF resistant electrode. The concentrations of key cations in the supernatant were analyzed using inductively coupled plasma optical emission spectrometry (ICP-OES). 19F, 31P, and 27Al liquid nuclear magnetic resonance (NMR) spectroscopy were used for the first time to evaluate the reaction of this phosphonic-based HF acid system with clay minerals. Coreflood experiments on Berea sandstone cores were conducted at 300°F at a flow rate of 2 cm³ /min using full …
  note: by Lijun Zhou.
  note: "Major Subject: Petroleum Engineering"
  note: Includes vita.
  note: Doctor of Philosophy Texas A & M University 2015 http://hdl.handle.net/1969.1/155235
  note: Includes bibliographical references.
  note: Text (Dissertation)
  subject:
    topic: Major Petroleum Engineering
  subject:
    topic: Phosphonic-based HF acid
  subject:
    topic: Clay minerals
  subject:
    topic: Chemical interactions
  subject:
    topic: Sandstone cores
  identifier: http://hdl.handle.net/1969.1/155235
  record info:
    record content source: TXA
    record creation date: 160216
    record change date: 20170928111812.0
    record identifier: in00003616660
    language of cataloging:
      language term: eng