DOI: http://dx.doi.org/10.18257/raccefyn.243

Artículo original

Caracterización microestructural de tipos de poros en reservorios no convencionales de gas utilizando MEB-FEC: Un ejemplo del Miembro Galembo de la Formación La Luna del Cretáceo, Cuenca del Valle Medio del Magdalena (Colombia

Carlos A. Ríos, Oscar M. Castellanos, Efraín Casadiego Q

Resumen


La mineralogía y la microestructura son variables claves que definen las propiedades físicas de una roca. Las lodolitas muestran distribuciones de tamaño de poro en la matriz inherentemente heterogéneas. Ellos pueden mostrar poros orgánicos e inorgánicos y el mecanismo de transporte a través de poros es diferente, y, por lo tanto, es necesario describir su porosidad orgánica e inorgánica. Este trabajo utiliza Microscopía Electrónica de Barrido de Fuente de Emisión de Campo para caracterizar las lodolitas del Miembro Galembo de la Formación La Luna del Cretácico, Cuenca del Valle Medio del Magdalena, Colombia. Hay varios tipos de poros en las lodolitas, incluyendo poros interpartículas debido a la floculación de minerales de arcilla, porosidad orgánica debida al enterramiento y madurez térmica de la materia orgánica, poros intrapartıculas de organismos, poros intrapartículas dentro de granos minerales, y microcanales y microfracturas, incluyendo disolución, relleno y fracturas entre capas. La existencia de poros interconectados en tal complejo sistema de poros-fracturas ofrece vías eficaces para la migración primariade gas y también proporciona un espacio de almacenamiento para el petróleo residual en las lodolitas, lo cual es importante para la migración primaria y almacenamiento de los recursos de gas asociado a lodolitas. La conectividad entre poros es alta y aumenta hacia la parte superior del Miembro Galembo. © 2016. Acad. Colomb. Cienc. Ex. Fis. Nat. Todos los derechos reservados.

Palabras clave


Lodolitas; Microestructural; Porosidad; Miembro Galembo; Formación La Luna; Cuenca del Valle Medio del Magdalena; Colombia.

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Referencias


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