<?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>0122-5383</journal-id>
<journal-title><![CDATA[CT&F - Ciencia, Tecnología y Futuro]]></journal-title>
<abbrev-journal-title><![CDATA[C.T.F Cienc. Tecnol. Futuro]]></abbrev-journal-title>
<issn>0122-5383</issn>
<publisher>
<publisher-name><![CDATA[Instituto Colombiano del Petróleo (ICP) - ECOPETROL S.A.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0122-53832022000100013</article-id>
<article-id pub-id-type="doi">10.29047/01225383.380</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[LOW - MEDIUM ENTHALPY GEOTHERMAL RESOURCE ASSESSMENT IN DEEP RESERVOIRS OF THE LLANOS BASIN -COLOMBIA]]></article-title>
<article-title xml:lang="es"><![CDATA[EVALUACIÓN DEL RECURSO GEOTÉRMICO DE BAJA - MEDIA ENTALPÍA EN RESERVORIOS PROFUNDOS DE LA CUENCA LLANOS -COLOMBIA]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Ramos]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gonzalez-Penagos]]></surname>
<given-names><![CDATA[Felipe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Patiño]]></surname>
<given-names><![CDATA[Cesar A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López]]></surname>
<given-names><![CDATA[Albeiro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Ecopetrol S.A  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<volume>12</volume>
<numero>1</numero>
<fpage>13</fpage>
<lpage>44</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0122-53832022000100013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0122-53832022000100013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0122-53832022000100013&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The exploration and exploitation of hydrocarbons in sedimentary basins such as the Llanos Basin of Colombia, have enabled the acquisition of large volumes of surface and subsurface data, for assessing the geothermal potential of deep aquifers. The integrated analysis of geothermal play elements such as temperature, reservoir - fluid properties, and their depth in the basin, with the available hydrogeological-chemical data, allow us to define three regional plays as follows: Play A, characterized by naturally fractured reservoirs, in crystalline basement rocks- Paleozoic, with temperatures above 150 ºC, semi-confined aquifers; b) Play B, composed by Mesozoic quartz sandstone reservoirs, with primary porosity greater than 10%, temperatures between 75 ºC to 150 ºC, semi-confined aquifers, near to high hydraulic head zones with 500 m difference ranges in the regional piezometric surface; c) Play C, composed by Mesozoic quartz sandstones, high primary porosity, temperatures below 100 ºC, confined aquifers. Available well and Oil and Gas production data suggests that Play A is speculative, Play B is hypothetical, and Play C is known.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La exploración y explotación de hidrocarburos en cuencas sedimentarias como la de los Llanos Orientales de Colombia, han hecho posible la adquisición de grandes volúmenes de información de superficie y subsuelo, que permiten evaluar el potencial calórico de los acuíferos profundos. Gracias al análisis integrado de los elementos del play geotérmico como la temperatura, las propiedades del reservorio y su profundidad en la cuenca, con la información hidrogeológica-química disponible, se pueden definir tres plays regionales como: Play A, compuesto por reservorios naturalmente fracturados, en rocas cristalinas del basamento - Paleozoico, con temperaturas superiores a 150ºC, acuíferos semiconfinados; Play B, compuesto por reservorios de areniscas cuarzosas del Mesozoico, con porosidad primaria mayor al 10%, temperaturas entre 75ºC a 150ºC, acuíferos semiconfinados, cercanos a zonas con 500 m de cabeza hidráulica; c) Areniscas cuarzosas del Mesozoico tardío, alta porosidad primaria, temperaturas menores a 75ºC en acuíferos confinados. La información disponible de pozos y producción de Oil and Gas sugieren que el Play A es especulativo, el Play B es hipotetico y el Play C está conocido.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Llanos Basin]]></kwd>
<kwd lng="en"><![CDATA[geothermal play]]></kwd>
<kwd lng="en"><![CDATA[hydrocarbons]]></kwd>
<kwd lng="en"><![CDATA[recoverable resources]]></kwd>
<kwd lng="es"><![CDATA[Cuenca Llanos]]></kwd>
<kwd lng="es"><![CDATA[play geotérmico]]></kwd>
<kwd lng="es"><![CDATA[hidrocarburos]]></kwd>
<kwd lng="es"><![CDATA[recursos recuperables]]></kwd>
</kwd-group>
</article-meta>
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