<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>J.J. Thordsen</dc:contributor>
  <dc:contributor>S.D. Hovorka</dc:contributor>
  <dc:contributor>H.S. Nance</dc:contributor>
  <dc:contributor>D.R. Cole</dc:contributor>
  <dc:contributor>T.J. Phelps</dc:contributor>
  <dc:contributor>K.G. Knauss</dc:contributor>
  <dc:creator>Y.K. Kharaka</dc:creator>
  <dc:date>2007</dc:date>
  <dc:description>&lt;div class="nova-legacy-l-flex__item nova-legacy-l-flex__item--grow research-detail-middle-section__item"&gt;&lt;div class="nova-legacy-c-card nova-legacy-c-card--spacing-m nova-legacy-c-card--elevation-1-above"&gt;&lt;div class="nova-legacy-c-card__body nova-legacy-c-card__body--spacing-inherit"&gt;&lt;div class="nova-legacy-e-text nova-legacy-e-text--size-m nova-legacy-e-text--family-sans-serif nova-legacy-e-text--spacing-none nova-legacy-e-text--color-grey-800 research-detail-middle-section__abstract"&gt;To investigate the potential for the long-term storage of CO 2 in deep saline aquifers, 1600 t of CO 2 were injected at 1500m depth into a 24-m-thick "C" sandstone of the Frio Formation near Houston, Texas. Fluid samples obtained before CO 2 injection from the injection well and an observation well 30m updip showed a Na-Ca-Cl type brine with ∼93,000 mg/L TDS at saturation with CH 4, but only 0.3% CO 2. Following CO 2 breakthrough, samples showed sharp drops in pH, pronounced increases in alkalinity and Fe, and significant shifts in the isotopic compositions of H 2O, and DIC. These parameters, together with perfluorocarbon tracer gases were used for monitoring migration of injected CO 2 into the overlying Frio "B", a 4-m-thick sandstone, separated from the "C" by ∼15m of shale and siltstone beds. Results from "B" 6 mo after injection show significant CO 2 (2.9% vs. 0.3% CO 2) migration into the "B" sandstone. Results of samples collected 15 mo after injection, however, show no indications of additional CO 2 in the "B" sandstone.&lt;/div&gt;&lt;/div&gt;&lt;/div&gt;&lt;/div&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:language>en</dc:language>
  <dc:title>Subsurface monitoring of anthropogenic CO 2 injected in sedimentary basins: Results from the Frio-I brine test, Texas, USA</dc:title>
  <dc:type>text</dc:type>
</oai_dc:dc>