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Previous issue date: 2013-01-31 / Petr?leo Brasileiro SA - PETROBRAS / The aim of this work was to describe the methodological procedures that were
mandatory to develop a 3D digital imaging of the external and internal geometry of the analogue
outcrops from reservoirs and to build a Virtual Outcrop Model (VOM). The imaging process of
the external geometry was acquired by using the Laser Scanner, the Geodesic GPS and the
Total Station procedures. On the other hand, the imaging of the internal geometry was
evaluated by GPR (Ground Penetrating Radar).The produced VOMs were adapted with much
more detailed data with addition of the geological data and the gamma ray and permeability
profiles. As a model for the use of the methodological procedures used on this work, the
adapted VOM, two outcrops, located at the east part of the Parnaiba Basin, were selected. On
the first one, rocks from the aeolian deposit of the Piaui Formation (Neo-carboniferous) and tidal
flat deposits from the Pedra de Fogo Formation (Permian), which arises in a large outcrops
located between Floriano and Teresina (Piau?), are present. The second area, located at the
National Park of Sete Cidades, also at the Piau?, presents rocks from the Cabe?as Formation
deposited in fluvial-deltaic systems during the Late Devonian. From the data of the adapted
VOMs it was possible to identify lines, surfaces and 3D geometry, and therefore, quantify the
geometry of interest. Among the found parameterization values, a table containing the thickness
and width, obtained in canal and lobes deposits at the outcrop Pared?o and Biblioteca were the
more relevant ones. In fact, this table can be used as an input for stochastic simulation of
reservoirs. An example of the direct use of such table and their predicted radargrams was the
identification of the bounding surface at the aeolian sites from the Piau? Formation. In spite of
such radargrams supply only bi-dimensional data, the acquired lines followed of a mesh profile
were used to add a third dimension to the imaging of the internal geometry. This phenomenon
appears to be valid for all studied outcrops. As a conclusion, the tool here presented can
became a new methodology in which the advantages of the digital imaging acquired from the
Laser Scanner (precision, accuracy and speed of acquisition) were combined with the Total
Station procedure (precision) using the classical digital photomosaic technique / Neste trabalho s?o apresentados os procedimentos metodol?gicos necess?rios para
realizar o imageamento digital 3D da geometria externa e interna de afloramentos an?logos a
reservat?rios, e elaborar seus Modelos Virtuais de Afloramentos (MVA). Para imagear a
geometria externa foram utilizados o Laser Scanner, o GPS Geod?sico e a Esta??o Total,
enquanto que para imagear a geometria interna foi utilizado o GPR. Nos MVA elaborados
foram acrescidas ainda as informa??es geol?gicas e as obtidas nas perfilagens com raios
gama e de permeabilidade. Como estudo de caso, para exemplificar os procedimentos
metodol?gicos propostos, foram escolhidos dois conjuntos de afloramentos na borda leste da
Bacia do Parna?ba. Na primeira ?rea ocorrem rochas de origem e?lica da Forma??o Piau?
(Neocarbon?fero) e plan?cie de mar? da Forma??o Pedra de Fogo (Permiano), que afloram em
um amplo corte de estrada, situado entre Floriano e Teresina (Piau?). A segunda ?rea, situada
no Parque Nacional de Sete Cidades, tamb?m no Piau?, envolve rochas da Forma??o Cabe?as
depositadas em sistemas fl?vio-deltaicos, durante o Neodevoniano. Com os MVA elaborados
foi poss?vel identificar, linhas, superf?cies e geometrias 3D e, assim, quantificar as geometrias
de interesse. Dentre as parametriza??es mais relevantes, ressaltam-se a tabela com valores de
espessura e largura, obtidas em dep?sitos de canais e em lobos, nos afloramentos Pared?o e
Biblioteca. Esta tabela pode ser utilizada como entrada (input) para simula??o estoc?stica de
reservat?rios. Um exemplo da aplica??o direta dos radargramas interpretados foi a
identifica??o de superf?cies limitantes, em dep?sitos e?licos, da Forma??o Piau?. Apesar dos
radargramas oferecerem apenas dados bidimensionais, a aquisi??o de linhas distribu?das
segundo uma malha acrescentou a terceira dimens?o ao imageamento das geometrias
internas em todos os afloramentos estudados. ? ainda proposta uma nova metodologia que
busca conciliar as vantagens obtidas com o imageamento digital com Laser Scanner (precis?o,
acur?cia e velocidade de aquisi??o) e a Esta??o Total (precis?o), com o uso cl?ssico de
fotomosaicos digitais
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/18365 |
| Date | 31 January 2013 |
| Creators | Souza, Anderson de Medeiros |
| Contributors | CPF:13893700382, http://lattes.cnpq.br/9888320802954176, C?rdoba, Val?ria Centurlon, CPF:59176911691, http://lattes.cnpq.br/8212523609187259, Vieira, Marcela Marques, CPF:83933212715, http://lattes.cnpq.br/0930845549110627, Lima Filho, M?rio Ferreira de, CPF:33343268453, http://lattes.cnpq.br/2799936991546818, Santos, Paulo Roberto dos, CPF:42393442804, SANTOS, Paulo Roberto dos Santos., Lima Filho, Francisco Pinheiro |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Geodin?mica e Geof?sica, UFRN, BR, Geodin?mica; Geof?sica |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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