Título: | AN XFEM ELEMENT TO MODEL INTERSECTIONS BETWEEN HYDRAULIC AND NATURAL FRACTURES IN POROUS ROCKS | |||||||
Autor: |
RUI FRANCISCO PEREIRA MOITAL LOUREIRO DA CRUZ |
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Colaborador(es): |
DEANE DE MESQUITA ROEHL - Orientador EURIPEDES DO AMARAL VARGAS JUNIOR - Coorientador |
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Catalogação: | 19/DEZ/2018 | Língua(s): | ENGLISH - UNITED STATES |
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Tipo: | TEXT | Subtipo: | THESIS | |||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=35888&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=35888&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.35888 | |||||||
Resumo: | ||||||||
A large number of hydrocarbon reservoirs are naturally fractured. When
subjected to hydraulic fracturing treatments, the natural fractures may influence the
propagation of the hydraulic fracture, which can grow in a complicated manner
creating complex fracture networks in the reservoir. In order to better understand
and simulate such phenomena an element based on the eXtended Finite Element
Method is proposed. The element formulation comprises fracture intersection and
crossing, fracture frictional behaviour, fully coupled behaviour between
displacements, pore and fracture fluid pressure, leak-off from the fracture to the
surrounding medium and the eventual loss of pressure due to filter cake. The
theoretical background and implementation aspects are presented. A set of analyses
is performed in order to validate different features of the implemented element.
Finally, the results of four practical applications are analysed and discussed: two
laboratory hydraulic fracture tests, hydraulic fracture propagation in a multifractured
synthetic model and percolation through a dam fractured foundation. It is
concluded that the implemented code provides very good predictions of the coupled
fluid-rock fracture behaviour and is capable of correctly simulating the interaction
between hydraulic and natural fractures. Moreover, it is shown that the hydraulic
behaviour of the models and the intersection between fractures are very sensible to
parameters such as differential in-situ stresses, angle between fractures, initial
hydraulic aperture and fracture face transversal conductivity.
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