New Concepts on the Development of East Brazilian Marginal Basins

Chang, Hung Kiang; Kowsmann, Renato Oscar; Figueiredo, António

doi:10.18814/epiiugs/1988/v11i3/007

Cited by 88 publications

(45 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…After obtaining the tectonic subsidence history of the wells from backstripping, we tried to find forward models that reproduce this observed subsidence pattern. All tested models involve an initial lithospheric thickness of 125 km (Chang et al 1988;Karner & Gambôa 2007) and a crustal thickness of 32 km (Chang et al 1992;Karner & Gambôa 2007;Aslanian et al 2009). The model that best fits the observed tectonic subsidence is plotted for all wells in Figure 4.…”

Section: Forward Modelsmentioning

confidence: 99%

“…*no information available highstand in eustatic sea-level (Chang et al 1992), resulting in transgressive sedimentary patterns (Contreras et al 2010). The end of this period of basin starvation is essentially controlled by a lack of sediment supply driven by local tectonics (Chang et al 1988;. This period was followed by a phase of higher subsidence rates during the Tertiary, which was mainly the effect of sedimentary loading of the lithosphere in response to high clastic supply, resulting in rapid shallowing of the basin and seaward progradation of the shelf (Chang et al 1992).…”

Section: Basin Cycle Evolutionmentioning

confidence: 99%

See 1 more Smart Citation

Tectonic subsidence history and source-rock maturation in the Campos Basin, Brazil

Beglinger

Wees

Cloetingh

et al. 2012

View full text Add to dashboard Cite

The Campos Basin is a petroleum-productive, marginal sag basin along the Brazilian margin. It contains a stratigraphic sequence recording lithospheric extension and rift tectonics developing to a fully evolved post-break-up setting. We present a combined approach using subsidence analysis and basin history inversion models to make predictions on source-rock maturation. The classical uniform stretching model does not account for the observed tectonic subsidence , and so we consider the thermal and subsidence implications of incorporating different events of magmatic underplating. The post-rift is characterized by one major phase of post-rift thermal subsidence: changes in sediment supply and load, as well as halokinetic movements, cause deviations from normal thermal subsidence and relaxation. The dimensions of these events have been examined and quantified. Our best-fit forward model is tested against measured borehole temperature (BHT) data. Results show a systematic overestimation of present-day temperatures in the shallow-water wells. Including the effects of hydrothermal convection by raising the conductivity of the top part of the stratigraphic sequence results in an almost perfect fit between predicted and measured BHTs in the shallow-water wells. Based on these forward models, we predict that the lacustrine shales of the syn-rift Lagoa Feia Fm. could be mature to generate oil and/or gas over a larger area than previously expected. Furthermore, our results suggest that the early post-rift Macaé Fm. is locally mature to generate oil, and that the middle/late post-rift Carapebus/Ubatuba Fm. shales are likely to generate oil as well, if organic-rich facies are indeed present. In light of the most recent pre- and post-salt discoveries made near established oil fields in the Campos Basin, our results support the idea that many more such accumulations may be found.

show abstract

Section: Forward Modelsmentioning

confidence: 99%

Section: Basin Cycle Evolutionmentioning

confidence: 99%

Tectonic subsidence history and source-rock maturation in the Campos Basin, Brazil

Beglinger

Wees

Cloetingh

et al. 2012

View full text Add to dashboard Cite

show abstract

“…1a), located at the continental margin of eastern Brazil, formed as a result of the rifting of Gondwana and the opening of the South Atlantic ocean during Mesozoic and Cenozoic times (cf. Asmus and Ponte, 1973;Ojeda, 1982;Chang et al, 1988). Basement rocks are composed mainly of Precambrian granites, gneisses, granulites and low-grade metasediments.…”

Section: Geological Settingmentioning

confidence: 99%

“…The overlying sedimentary cover can be divided into four units (cf. Chang et al, 1988;Cainelli and Mohriak, 1999) (Fig. 1b), as follows: (i) A Neocomian to Early Aptian syn-rift unit consisting of continental fluvial to lacustrine-deltaic conglomerates and sandstones associated with organicrich lacustrine shales of the Mariricu Formation.…”

Section: Geological Settingmentioning

confidence: 99%

Reservoir Quality Assessment and Petrofacies of the Lower Cretaceous Siliciclastic, Carbonate and Hybrid Arenites From the Jequitinhonha Basin, Eastern Brazil

Jardim

Ros

Ketzer

2011

Journal of Petroleum Geology

View full text Add to dashboard Cite

A study of the rift to early drift phase, fluvial, deltaic and shallow-marine Lower Cretaceous (Upper Aptian to Lower Albian) siliciclastic sandstones, hybrid arenites and calcarenites from the Jequitinhonha Basin, eastern Brazilian margin, has shown that the distribution of diagenetic alterations and of related reservoir quality evolution can be constrained within a sequence stratigraphic framework. Description of cores, wireline logs, thin sections and petrophysical (porosity and permeability) analyses were integrated in order to investigate the controls on patterns of diagenesis in these rocks, and hence of reservoir quality distribution. The results of this study will be relevant to the exploration of rift and early drift successions in Atlantic-type passive margin settings. The study suggests that depositional facies and detrital composition impact the diagenetic evolution and the characterization and prediction of reservoir quality.Reservoir quality assessment was based on the concept of reservoir petrofacies, which is defined in terms of the main attributes affecting reservoir quality including depositional structures, textures, primary composition, diagenetic processes and products, and pore types. This paper demonstrates the practical use of the reservoir petrofacies concept in the evaluation of the controls on porosity and permeability, as well as on seismic and log signatures.

show abstract

“…Esses fluidos bacinais são aprisionados nas inclusões durante a formação de minerais autigênicos durante diferentes estágios da história diagenética e no selamento de microfraturas em grãos detríticos (ROEDDER, 1984;REYNOLDS, 1994;GOLDSTEIN, 2001 (MCMILANS, 1987;KARLSEN et al, 1993, NEILSON et al, 1998, e como fonte de hidrocarbonetos pouco alterados para análises de biomarcadores (ISAKSEN et al, 1998;GEORGE et al, 2007). Gondwana, processo que se iniciou no Neojurássico (CHANG et al, 1988;MATOS, 1992MATOS, , 1999, esta bacia tem como embasamento as rochas précambrianas da Província Borborena (ALMEIDA et al 1977(ALMEIDA et al , 1981 VAN SCHMUS et al, 1995;MARTINS et al, 1998;FETTER et al, 2000;CASTRO et al, 2003;CASTRO, 2004) BORGES, 1993;ROSSETTI, 2005). Na porção submersa, os grabens assimétricos tem a orientação de seus eixos próxima a atual linha costa (BERTANI et al, 1990).…”

Section: Lista De Figurasunclassified

Aplicação de inclusões fluidas à reconstrução da história de migração de hidrocarbonetos na Bacia Potiguar, RN

Pestilho¹

View full text Add to dashboard Cite

Fluid inclusions are an invaluable source of information in the reconstruction of the reservoir hydrocarbon filling history and in the understanding of sedimentary basin evolution. In this study, fluid inclusions were used with the primary aim of unravelling the diagenetic and hydrocarbon migration history in the Potiguar Basin which is an important petroliferous province located in the easternmost section of the Brazilian equatorial margin. Applied methods included facies analysis, ultraviolet epifluorescence petrography, cathodoluminescence and scanning electron microscopy, ultraviolet fluorescence spectrophotometry of petroleum inclusions, confocal scanning laser microscopy, organic geochemistry (biomarkers) analysis and unidimensional basin modeling. Aiming to study the main petroleum systems in this basin, a total of four wells located in four oilfields were chosen: (1) three onshore -Lorena (reservoir: Pendência Formation), Canto do Amaro and Baixa do Algodão (reservoir: Açu Formation); (2) one offshore -Ubarana Oilfield (reservoir: Açu Formation; and the adjacent carbonates from the Ponta do Mel Formation). The results indicated that the pervasive clay infiltration in the Açu Formation fluvial sandstones during the eodiagenesis inhibited the cementation and petroleum inclusion formation in the Canto do Amaro and Baixa do Algodão reservoirs. As a result, the use of fluid inclusions to understand petroleum migration was unfeasible in the onshore Açu Formation. In contrast, in the Ubarana area, petroleum inclusion entrapment in quartz pebble microcracks of the Açu Formation fan-delta conglomerates occurred during the late mesodiagenesis. In Ponta do Mel Formation shallow shelf carbonates, petroleum inclusions were entrapped in saddle dolomite veins during late mesodiagenesis. In the Lorena Oilfield, petroleum inclusions were entrapped in quartz and albite cements during the mesodiagenesis of the arkose hyperpycnites of the Pendência Formation. The petroleum fluorescence spectra showed that the Ubarana and Lorena petroleum inclusions had different API gravity, variable proportion of saturate, aromatic, resin and asphaltene compounds and were not biodegraded. Moreover, Pendência and Ponta do Mel inclusions suggest multiple pulses of hydrocarbon migration, while Açu inclusions record a homogeneous pulse. Biomarkers indicate that the Pendência and iv Açu inclusion oils correlate with reservoir oil extracts. The Pendência inclusion oils are similar to the lacustrine oils of the Umbuzeiro Graben (Pendência Formation), whereas the Açu inclusion oil displays closer biomarker signature to the Areia Branca trend of mixed oils (Alagamar Formation source rock). However, the oil from fluid inclusions of the Ponta do Mel has characteristics of the Alagamar Formation lacustrine organic facies. The absence of mixed-oils in the Ponta do Mel suggests an earlier lacustrine oil migration through the carbonate fractures prior to the main infill of mixed-oils in the Ubarana Oilfield. The fluid inclusion microthermometry, confocal ...

show abstract

New Concepts on the Development of East Brazilian Marginal Basins

Cited by 88 publications

References 1 publication

Tectonic subsidence history and source-rock maturation in the Campos Basin, Brazil

Tectonic subsidence history and source-rock maturation in the Campos Basin, Brazil

Reservoir Quality Assessment and Petrofacies of the Lower Cretaceous Siliciclastic, Carbonate and Hybrid Arenites From the Jequitinhonha Basin, Eastern Brazil

Aplicação de inclusões fluidas à reconstrução da história de migração de hidrocarbonetos na Bacia Potiguar, RN

Contact Info

Product

Resources

About