Repositorio Digital Sernageomin
Not a member yet
15512 research outputs found
Sort by
A Holocene tephra layer within coastal aeolian deposits north of Caleta Olivia (Santa Cruz Province, Argentina)
No full textpp.267-28
Reporte de visita técnica: Sector Laguna Foitzick, comuna de Coyhaique, región de Aysén del General Carlos Ibáñez del Campo
No full textRevisor: Alejandro Alfaro.4 p
Evaluación de impacto en acuíferos y peligro de remoción en masa en laderas intervenidas en los loteos “Piedra Hueca-Pilolcura, El Canelal, Cutipay Alto y Cutipay 2”, comuna de Valdivia, región de Los Ríos
No full textRevisor: Carlos Johnson N. ; Código de identificación interno: INF-LOS RÍOS-10.202133 p
Evaluación geológica de puntos de encuentro transitorio en las localidades de Pucura y Traitraico en caso de erupción del volcán Villarrica
No full textRevisor: Alvaro Amigo R. y Virginia Toloza T. ; Código de identificación interno: RNVV/2021-0130 p
Sistemas geotermales de la Zona Volcánica Sur Central de los Andes de Chile (38-41° S): Modelos conceptuales con base en geología y geofísica ZTEM
Get PDFInforme Registrado IR-21-92 ; Contiene Anexos: I.Definición de modelo conceptual ; II.Introducción al método ZTEM ; III.Base de datos químicos123 p
Reporte de visita técnica: sector Curaco Bajo, comuna de Tomé, región del Biobío
No full textRevisor: Alejandro Alfaro6 p
Remoción en masa en el sector del rio Golgol, comuna de Puyehue, Provincia de Osorno, Región de Los Lagos
No full textInforme Técnico INF-Los Lagos-01.2021 -- Unidad Ejecutora: Oficina Técnica Puerto Varas, Región de Los Lagos13 p
Evaluación geológica de puntos de encuentro transitorio en las comunas de Curacautín, Melipeuco, Cunco y Vilcún en caso de erupción del volcán Llaima
No full textRevisor: Alvaro Amigo R. y Virginia Toloza T. ; Código de identificación interno: RNVV/2021-0370 p
Diagenesis and thermal maturity of the Cogollo Group sedimentary rocks in the ANH-CR-Montecarlo-1X well, Cesar-Ranchería Basin, Colombia
No full textThe exploration well ANH-CR-Montecarlo-1X, in the southern part of the Cesar-Ranchería basin in Colombia, cuts sedimentary rocks assigned to the Cogollo Group (Barremian-Cenomanian). The present study integrates petrographic techniques (thin section microscopy and scanning electron microscopy), geochemistry (total organic carbon and pyrolysis rock-eval) and basic petrophysics to establish the thermal maturity and potential of these rocks as a conventional or unconventional hydrocarbon reservoir. The results of petrographic analysis revealed that the rocks correspond to quartz sandstones and greywackes and the carbonate rocks to mudstones and wackestones. These were affected by diagenetic processes such as compaction and mineral neoformations. The latter include minerals from the clays group that cover the grains of the rock framework, and other types of precipitates, such as silica, ferrous and nonferrous carbonate that cement them. Some of these minerals present partial or total dissolution, for which secondary porosity is recognized. Chloritization and illitization of the argillaceous matrix and feldspars alteration to ferrous and non-ferrous carbonate are also observed, which affects the porosity and permeability of the rock. Additionally, during diagenesis micrite is recrystallized to sparite and carbonate precipitation ocurred in the calcareous rocks. The study also shows that the rocks were more affected by compaction than precipitation of the different types of cement, thus reducing their porosity and permeability. Based on these parameters the siliciclastic rocks in study area have a low potential as conventional reservoir but a good potential as non-conventional reservoir (tight sandstones). The geochemical studies in the calcareous rocks exhibit low content of total organic carbon (between 0 and 4.5% with an average of 0.71%), with kerogens type III and IV. They have high levels of organic matter conversion, indicative that the rocks did generate hydrocarbons, but currently are depleted and in a mature state, compatible with a low potential of hydrocarbon generation.pp.472-49