<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0120-0283</journal-id>
<journal-title><![CDATA[Boletín de Geología]]></journal-title>
<abbrev-journal-title><![CDATA[Bol. geol.]]></abbrev-journal-title>
<issn>0120-0283</issn>
<publisher>
<publisher-name><![CDATA[Universidad Industrial de Santander]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-02832022000200199</article-id>
<article-id pub-id-type="doi">10.18273/revbol.v44n2-2022010</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Determinación del ángulo de giro para la extracción de plugs en núcleos preservados usando imágenes de tomografía de rayos X]]></article-title>
<article-title xml:lang="en"><![CDATA[Determination of turning angle for extraction of plugs from preserved cores using X-ray images tomography]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera-Otero]]></surname>
<given-names><![CDATA[Edwar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Badillo-Requena]]></surname>
<given-names><![CDATA[Juan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pereira-Santana]]></surname>
<given-names><![CDATA[Zaida Carolina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Industrial de Santander Escuela de Ingeniería de Petróleos Grupo de Investigación en Tomografía Computarizada para Caracterización de Yacimientos]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2022</year>
</pub-date>
<volume>44</volume>
<numero>2</numero>
<fpage>199</fpage>
<lpage>210</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-02832022000200199&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-02832022000200199&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-02832022000200199&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los plugs son submuestras extraídas de núcleos de perforación, los cuales son usados para medir directamente propiedades asociadas a la roca y a la interacción con el fluido; cualquier modelo petrofísico debe tener datos de laboratorio provenientes de estos para su debida calibración, de allí su importancia. En consecuencia, el presente trabajo plantea una metodología que permite determinar con exactitud la ubicación de puntos de interés, incluido el ángulo de giro del núcleo, para su posterior extracción; esto asegura la integridad y representatividad, una vez que exista la ubicación de la zona de interés mediante registros de pozo. La metodología usa imágenes de tomografía de rayos X en los cortes axiales, radiales y verticales. Se encontraron ecuaciones que permiten medir directamente en imágenes escaladas el ángulo de buzamiento real en las imágenes cilíndricas y el aparente en los cortes verticales; adicionalmente, se crearon dos nomogramas que permiten determinar el ángulo de giro del núcleo de perforación, una vez calculados los datos de buzamiento de la estructura planar de interés.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The plugs are subsamples extracted from drilling cores, which are used to measure directly the properties associated with the rock and its interactions with the fluid. Any petrophysics model must have laboratory data from the samples to be calibrated. Due to this, it is important that samples are representative and in a good condition. This research proposes a methodology to determine exactly the location of interest points, including the turning angle of the core for its further extraction. This guarantees the integrity and representativeness when the interest zone is selected through well logging. The methodology uses X-ray tomography images on axial, radial, and vertical cuts. It was possible to create equations to measure in scaled images the real dip angle in the cylindric images and vertical cuts. It was also possible to create two nomograms that allow calculating the turning angle of the drilling core, once the dip data of the interest structure is calculated.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Plugs]]></kwd>
<kwd lng="es"><![CDATA[Tomografía de rayos X]]></kwd>
<kwd lng="es"><![CDATA[Nomograma]]></kwd>
<kwd lng="es"><![CDATA[Núcleos de perforación]]></kwd>
<kwd lng="es"><![CDATA[Ángulo de giro]]></kwd>
<kwd lng="en"><![CDATA[Plugs]]></kwd>
<kwd lng="en"><![CDATA[X-ray tomography]]></kwd>
<kwd lng="en"><![CDATA[Nomogram]]></kwd>
<kwd lng="en"><![CDATA[Drilling core]]></kwd>
<kwd lng="en"><![CDATA[Turning angle]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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