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dc.contributor.author
Richiano, Sebastián Miguel
dc.contributor.author
Varela, Augusto Nicolás
dc.contributor.author
Gómez Peral, Lucia
dc.contributor.author
Cereceda, Abril
dc.contributor.author
Poire, Daniel Gustavo
dc.date.available
2018-06-19T17:28:09Z
dc.date.issued
2015-09
dc.identifier.citation
Richiano, Sebastián Miguel; Varela, Augusto Nicolás; Gómez Peral, Lucia; Cereceda, Abril; Poire, Daniel Gustavo; Composition of the Lower Cretaceous source rock from the Austral Basin (Río Mayer Formation, Patagonia, Argentina): Regional implication for unconventional reservoirs in the Southern Andes; Elsevier; Marine And Petroleum Geology; 66; Parte 4; 9-2015; 764-790
dc.identifier.issn
0264-8172
dc.identifier.uri
http://hdl.handle.net/11336/49319
dc.description.abstract
The importance of the Río Mayer Formation (Lower Cretaceous, prodelta to marine outer shelf) in the hydrocarbon development of the Austral Basin (Patagonia, Argentina) has been recognized by several authors. This unit plays a key-role as source rock and caprock in the "Inoceramus inferior-Springhill" petroleum system, the most important in the basin. In this work we demonstrate that the composition of the Río Mayer Formation highly matches with the requirements to be considered for shale-oil/gas exploitation. The unit studied mainly consists of laminated black siliciclastic mudtones and shales with interbedded marlstones and sandstone levels, and in subsurface shows TOC values up to 3% and kerogen types between II and III. Compositional studies from outcrops of this unit are almost absent and constitute the main focus of this contribution. A total of ten detailed sedimentological logs were measured from the field and X-ray diffraction analysis (XRD), standard petrography, scanning electron microscopy (SEM) and determination of major elements in clay minerals by EDAX were carried out in order to characterize the composition of the Río Mayer Formation. XRD analyses (in fine-grained sediments) indicate a composition dominated by quartz and calcite, with minor proportions of feldspars and clays. Marine sediments are dominated by illite and chlorite, and commonly accompanied by mixed layered illite-smectite (IS), while the prodelta is smectite-dominated with more than 90% of this clay. Both, authigenic and detrital clays were identified using SEM-EDAX. Sandstones of the Río Mayer Formation are generally lithic and feldspar graywackes. Provenance analyses in sandstones make possible the discrimination of four groups of samples differentiated by their ages and palaeoenvironments. In comparison with other important shale-reservoirs from North America (Barnett, Marcellus, Woodford, Haynesville and Doig), the composition of the unit studied have more quartzitic composition, reflecting in a high brittleness index (BI) that result in a clear brittle pattern.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Clay Assemblages
dc.subject
Petrographic Analysis
dc.subject
Sem-Edax
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Shale-Oil/Gas
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Meteorología y Ciencias Atmosféricas
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Composition of the Lower Cretaceous source rock from the Austral Basin (Río Mayer Formation, Patagonia, Argentina): Regional implication for unconventional reservoirs in the Southern Andes
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-06-18T21:19:51Z
dc.journal.volume
66
dc.journal.number
Parte 4
dc.journal.pagination
764-790
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Richiano, Sebastián Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
dc.description.fil
Fil: Varela, Augusto Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
dc.description.fil
Fil: Gómez Peral, Lucia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
dc.description.fil
Fil: Cereceda, Abril. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
dc.description.fil
Fil: Poire, Daniel Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
dc.journal.title
Marine And Petroleum Geology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.marpetgeo.2015.07.018
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0264817215300398


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