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dc.contributor.author
Cesaretti, Nora Noemi
dc.contributor.author
Parnell, John
dc.contributor.author
Dominguez, Eduardo Alejandro
dc.date.available
2019-07-31T16:31:26Z
dc.date.issued
2000-10
dc.identifier.citation
Cesaretti, Nora Noemi; Parnell, John; Dominguez, Eduardo Alejandro; Pore fluid evolution within a hydrocarbon reservoir: Yacoraite formation (upper Cretaceous), northwest basin, Argentina; Wiley Blackwell Publishing, Inc; Journal Of Petroleum Geology; 23; 4; 10-2000; 375-398
dc.identifier.issn
0141-6421
dc.identifier.uri
http://hdl.handle.net/11336/80677
dc.description.abstract
Hydrocarbon and aqueous fluid inclusions in quartz and anhydrite cements in sandstones and carbonates in the upper part of the Yacoraite Formation (Upper Cretaceous) were studied in wells in the Lomas de Olmedo Sub-basin, Northwest Basin, Argentina. Intergranular, mouldic and vuggy primary porosity in these rocks was reduced by quartz overgrowths, anhydrite cement and bitumen, and was increased by dolomite recrystallization and fracturing. High porosities are thought to reflect high pore fluid pressures; the highest porosities are associated with a greater abundance of secondary fluid inclusions, reflecting healing of microfractures produced by the release of overpressured fluids. Paraffinic (light) and asphaltic (heavy to medium?) hydrocarbon fluid inclusions are recognized by their light-blue and yellow-greenish fluorescence colours. In the stratigraphically lower levels of the Yacoraite Formation, reddish-fluorescent asphaltic fluid inclusions with lower cloud points predominate, whereas in the upper levels, lighter hydrocarbons with higher cloud points, propane, ethane and methane occur in the inclusions. For aqueous fluid inclusions, data from freezing experiments indicate that NaCl-MgCl2-Na2SO4-NaHCO3-NaCO3 brines were present during cementation with 17 equiv. wt.% NaCl. Temperatures during cementation were in the range 121-137°C, indicating that the samples are in the oil and gas window. The petrographic data indicate that a hydrocarbon fluid has been present since early diagenesis began. An increase in burial depth is correlated with an increase in the temperature and pressure in the pore fluids. This caused the maturation of organic matter in the carbonates, generating CO2 and carboxyl ions, which in turn caused carbonate dissolution and anhydrite and dolomite precipitation. In the sandstones, the maturation of oil resulted in bitumen pore-fillings and secondary fluorescing inclusions.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Pore
dc.subject
Fluid Evolution
dc.subject
Within
dc.subject
Hydrocarbon Reservoir
dc.subject.classification
Geología
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Pore fluid evolution within a hydrocarbon reservoir: Yacoraite formation (upper Cretaceous), northwest basin, Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-07-11T19:19:37Z
dc.journal.volume
23
dc.journal.number
4
dc.journal.pagination
375-398
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Cesaretti, Nora Noemi. Universidad Nacional del Sur. Departamento de Geología; Argentina
dc.description.fil
Fil: Parnell, John. University of Aberdeen; Reino Unido
dc.description.fil
Fil: Dominguez, Eduardo Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
dc.journal.title
Journal Of Petroleum Geology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1747-5457.2000.tb00493.x
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1111/j.1747-5457.2000.tb00493.x


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