<?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>0016-7169</journal-id>
<journal-title><![CDATA[Geofísica internacional]]></journal-title>
<abbrev-journal-title><![CDATA[Geofís. Intl]]></abbrev-journal-title>
<issn>0016-7169</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Geofísica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0016-71692024000301007</article-id>
<article-id pub-id-type="doi">10.22201/igeof.2954436xe.2024.63.3.1742</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Experimental Bedford limestone permeability dependence on confining stress and pore pressure. A comparative study with previous works]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez-Torres]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Serrano-Saldaña]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Coronado]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Díaz-Viera]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Llanos-Rivera]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Mexicano del Petróleo  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2024</year>
</pub-date>
<volume>63</volume>
<numero>3</numero>
<fpage>1007</fpage>
<lpage>1032</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0016-71692024000301007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0016-71692024000301007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0016-71692024000301007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The impact of changes in the state of the confining stress and pore pressure on the permeability of a rock is especially important in the exploitation of oil reservoirs, particularly due to the decreases in the reservoir fluid pressure during the extraction of hydrocarbons. Over the years, numerous experimental studies have been conducted with core samples that have shown a wide range of responses. In the present study, this effect was analyzed in Bedford limestone. Two different modes of confinement, hydrostatic and non-hydrostatic, are investigated. The permeability data obtained from the experiments are fitted to commonly used models based on confining stress, core pressure and effective stress. The results indicate that the linear models offer a satisfactory fit in both confinement modes. A relatively high effective stress coefficient of 5.78 is observed in the hydrostatic mode, while an unusual negative value of -1.63 is found in the non-hydrostatic mode. These results were examined in the context of published permeability data and fitting models. To facilitate this analysis, complete tables were prepared that integrate the information available from the literature on permeability experiments in sandstones and limestones.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El impacto de los cambios en el estado del esfuerzo de confinamiento y de la presión de poro sobre la permeabilidad de una roca es muy importante en la explotación de yacimientos de petróleo, particularmente los cambios por la disminución de la presión del yacimiento durante la extracción de hidrocarburos. A lo largo de los años, se han realizado numerosos estudios experimentales con muestras de núcleos que han mostrado una amplia gama de respuestas. En el presente estudio, se analizó dicho efecto en una muestra de roca caliza Bedford. Se investigan dos modos diferentes de confinamiento, hidrostático y no hidrostático. Los datos de permeabilidad obtenidos de los experimentos se ajustan a modelos comúnmente utilizados basados en el esfuerzo de confinamiento, la presión de poro y el esfuerzo efectivo. Los resultados indican que los modelos lineales ofrecen un ajuste satisfactorio en ambos modos de confinamiento. Se observa un coeficiente efectivo de presión relativamente grande de 5.78 en el modo hidrostático, mientras que se encuentra un inusual valor negativo de -1.63 en el modo no hidrostático. Estos resultados se examinaron en el contexto de los datos de permeabilidad y modelos de ajuste publicados. Para facilitar este análisis, se elaboraron tablas completas que integran la información disponible de la literatura sobre experimentos de permeabilidad en areniscas y calizas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Permeability]]></kwd>
<kwd lng="en"><![CDATA[confining stress]]></kwd>
<kwd lng="en"><![CDATA[pore pressure]]></kwd>
<kwd lng="en"><![CDATA[effective stress and effective stress coefficient]]></kwd>
<kwd lng="es"><![CDATA[Permeabilidad]]></kwd>
<kwd lng="es"><![CDATA[esfuerzo de confinamiento]]></kwd>
<kwd lng="es"><![CDATA[presión de poro]]></kwd>
<kwd lng="es"><![CDATA[esfuerzo efectivo y coeficiente efectivo de presión]]></kwd>
</kwd-group>
</article-meta>
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