Características de la estructura porosa y potencial de almacenamiento de gas de la Formación La Luna del Cretáceo, Cuenca del Valle Medio del Magdalena, Colombia
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Keywords
Reservorio de gas, mineralogía, petrografía, microestructural, Formación La Luna
Resumen
Las rocas de interés en el presente estudio (lodolitas) muestran inherentemente una distribución heterogénea de tamaño de poro en la matriz. Pueden presentar poros orgánicos e inorgánicos y el mecanismo de transporte a través de los poros es diferente y, por lo tanto, es necesario describir su porosidad orgánica e inorgánica. Este trabajo recurre al uso de diferentes técnicas de microscopía para caracterizar las lodolitas del miembro de Galembo de la Formación La Luna del Cretáceo, Cuenca del Valle Medio del Magdalena, Colombia. Estas rocas presentan varios tipos de poros, incluidos los poros entre partículas debido a la floculación de los minerales arcillosos, la organoporosidad debido a la maduración térmica y el enterramiento, los poros intraparticulares de los organismos, los poros dentro de los granos minerales y los microcanales y microfracturas. La existencia de poros interconectados en este complejo sistema de poro-fractura proporciona vías efectivas para la migración de gas primario y también proporciona un espacio de almacenamiento para el hidrocarburo residual en las lodolitas, lo cual es importante para la migración primaria y el almacenamiento en rocas reservorio de gas. La conectividad de los poros es alta y aumenta hacia la parte superior de la secuencia sedimentaria.
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Referencias
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