DOI: 10.1306/08131413170
Scopus记录号: 2-s2.0-84927139362
论文题名: Mineralogical signature of hydrocarbon circulation in Cretaceous red beds of the Barda González area, Neuquén Basin, Argentina
作者: Pons M.J. ; Rainoldi A.L. ; Franchini M. ; Giusiano A. ; Cesaretti N. ; Beaufort D. ; Patrier P. ; Impiccini A.
刊名: AAPG Bulletin
ISSN: 0149-1469
EISSN: 1558-9199
出版年: 2015
发表日期: 2015
卷: 99, 期: 3 起始页码: 525
结束页码: 554
语种: 英语
Scopus关键词: Calcite
; Carbon dioxide
; Cements
; Dissolution
; Isotopes
; Oil bearing formations
; Petroleum deposits
; Petroleum reservoirs
; Pyrites
; Sandstone
; Authigenic minerals
; Calcite crystals
; Carbon dioxide pressures
; Hydrocarbon compositions
; Hydrocarbon-bearing fluid inclusions
; Isotope compositions
; Microbial reduction
; Permeable layers
; Hydrocarbons
; authigenic mineral
; calcite
; carbon dioxide
; cement
; Cretaceous
; dissolution
; formation water
; hydrocarbon
; mineralogy
; red bed
; Argentina
; Neuquen Basin
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: The Portezuelo Formation is part of a red bed sequence in the Neuquén Basin assigned to the Neuquén Group (lower Cenomanian-middle Campanian). In outcrops of the Portezuelo Formation in the Barda González region, iron oxide and hydroxide cements are only preserved in the less permeable claystone layers. Paleomigration of hydrocarbons and formation waters along the most permeable layers bleached the rocks due to partial to total dissolution of cements and grains and formation of several authigenic minerals: (1) montmorillonite and pyrite in the medium- to fine-grained sandstones and mudstones, and (2) multistage calcite and pyrite in the coarse-grained sandstones and conglomerates. The δ34SCDT (Canyon Diablo troilite) of -24.4 to -60‰ values in pyrite point to microbial reduction of a sulfate precursor. The oxidation of hydrocarbons and fluctuations in pH and carbon dioxide pressure caused by organic acids resulted in multiple stages of dissolution and precipitation of calcite. Calcite crystals host hydrocarbon-bearing fluid inclusions (± pyrite) with variable fluorescence color, indicating that hydrocarbon composition changed with time. The intermediate δ13CPDB (Peedee belemnite) (-8.1 ‰ to -8.52‰) and δ18OPDB (-9.76 to -9.83%o) isotope composition of calcites may have resulted from mixtures of 13C-rich CO2 after the dissolution of local calcrete with 13C-poor CO2 from oxidizing hydrocarbons. This contribution provides for the first time key information to predict the distribution of authigenic minerals in reservoir rocks in the basin and improves understanding of the diagenetic history of the Portezuelo Formation. Copyright © 2015. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84927139362&doi=10.1306%2f08131413170&partnerID=40&md5=0e4632f0becefad554de726a0ea72416
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13040
Appears in Collections: 过去全球变化的重建 影响、适应和脆弱性 科学计划与规划 气候变化与战略 全球变化的国际研究计划 气候减缓与适应 气候变化事实与影响
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Recommended Citation:
Pons M.J.,Rainoldi A.L.,Franchini M.,et al. Mineralogical signature of hydrocarbon circulation in Cretaceous red beds of the Barda González area, Neuquén Basin, Argentina[J]. AAPG Bulletin,2015-01-01,99(3)