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Previous issue date: 2010-04-14 / This work aims to study the fluctuation structure of physical properties of oil well profiles. It was used as technique the analysis of fluctuations without trend (Detrended Fluctuation Analysis - DFA). It has been made part of the study 54 oil
wells in the Campo de Namorado located in the Campos Basin in Rio de Janeiro. We studied five sections, namely: sonic, density, porosity, resistivity and gamma rays. For most of the profiles , DFA analysis was available in the literature, though the sonic perfile was estimated with the aid of a standard algorithm. The comparison between the exponents of DFA of the five profiles was performed using linear correlation of variables, so we had 10 comparisons of profiles. Our null hypothesis is that the values of DFA for the various physical properties are independent. The main result indicates that no refutation of the null hypothesis. That is, the fluctuations observed by DFA in the profiles do not have a universal character, that is, in general
the quantities display a floating structure of their own. From the ten correlations studied only the profiles of density and sonic one showed a significant correlation (p> 0.05). Finally these results indicate that one should use the data from DFA with caution, because, in general, based on geological analysis DFA different profiles can lead to disparate conclusions / Esta disserta??o tem como objetivo estudar a estrutura de flutua??o de propriedades f?sicas dos perfis de po?os de petr?leo. Usou-se como t?cnica a an?lise de flutua??es sem tend?ncia (Detrended Fluctuation Analysis DFA). Fizeram parte do estudo 54 po?os de petr?leo do Campo de Namorado localizado na Bacia de Campos, no Estado do Rio de Janeiro. Foram estudados cinco perfis, quais sejam: s?nico, densidade, porosidade, resistividade e raios gama. Para a maioria dos perfis, a an?lise de DFA j? estava dispon?vel na literatura; entretanto o perfil s?nico foi estimado com o aux?lio de um algoritmo padr?o. A compara??o entre os expoentes de DFA dos cinco perfis foi feita usando correla??o linear de vari?veis; assim t?nhamos 10 compara??es de perfis. Nossa hip?tese nula ? que os valores de DFA para as diversas propriedades f?sicas s?o independentes. O principal resultado indica a n?o refuta??o da hip?tese nula. Isto ?, as flutua??es apresentadas pelos
DFA dos perfis n?o apresentam um car?ter universal; ou seja, em geral, as grandezas exibem uma estrutura de flutua??o que lhes ? pr?pria. Das dez correla??es estudadas, apenas os perfis de densidade e o s?nico apresentaram uma correla??o significativa (p<0,05). Enfim, estes resultados indicam que se devem usar os dados de DFA com cautela, pois, em geral, an?lises geol?gicas baseadas em DFA de perfis diferentes podem levar a conclus?es d?spares
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/12917 |
| Date | 14 April 2010 |
| Creators | Ribeiro, Robival Alves |
| Contributors | CPF:36990485000, http://lattes.cnpq.br/0274040885278760, Lucena, Liacir dos Santos, CPF:00405663404, http://lattes.cnpq.br/7151949476055522, Fulco, Umberto Laino, CPF:67196675487, http://lattes.cnpq.br/9579151361576173, Mohan, Madras Viswanathan Gandhi, CPF:04295882755, http://lattes.cnpq.br/1995273890709490, Corso, Gilberto |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Ci?ncia e Engenharia do Petr?leo, UFRN, BR, Pesquisa e Desenvolvimento em Ci?ncia e Engenharia de Petr?leo |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| 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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