Finite element with embedded discontinuities analysis of well production decline due to fracture closure in naturally fr
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.3997/2214-4609.201802156 http://hdl.handle.net/11449/221509 |
Resumo: | In naturally fractured reservoirs, the fractures may represent the main pathway for fluid flow. Therefore, the magnitude of fracture permeability plays a fundamental role in the productivity of such type of reservoir. In reservoirs sensitive to the stress state, the depletion due to production can lead to the closure of the fractures, as a function of the increase of effective confining stress, promoting a significant decrease in the overall permeability of the reservoir. Thus, understanding the hydraulic characteristics of the fracture network as a function of the effective confining stress is fundamental for the design of reservoir development, besides the predictability of its behavior. In this paper, a strong discontinuity approach to embed discontinuities into finite elements was adopted to represent the behavior of fractures in rock formations. To properly derive embedded discontinuity finite element formulations, fundamental aspects regarding to the kinematics and statics of the discontinuity must be considered. The kinematic enrichment must correctly reflect the position of the interface in the element as well as the relative displacement (opening and sliding) between the two opposite faces of the interface. Furthermore, the traction continuity condition must be properly imposed to ensure a correct relationship between the tractions in the internal interface and the stresses in the surrounding continuum portion. The simulation of the problem of closing natural fractures by reservoir depletion was carried out. A numerical tool was used to embed the natural fracture network into the finite element mesh, with respect to the geological mapping of these fractures. To model the mechanical behavior of material, it was adopted a hyperbolic model of fracture closure proposed by Barton & Bandis. It was possible to observe a decrease in the rate of production due to the collapse of the existing fractures that decreased the permeability around the production wells. |
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Finite element with embedded discontinuities analysis of well production decline due to fracture closure in naturally frIn naturally fractured reservoirs, the fractures may represent the main pathway for fluid flow. Therefore, the magnitude of fracture permeability plays a fundamental role in the productivity of such type of reservoir. In reservoirs sensitive to the stress state, the depletion due to production can lead to the closure of the fractures, as a function of the increase of effective confining stress, promoting a significant decrease in the overall permeability of the reservoir. Thus, understanding the hydraulic characteristics of the fracture network as a function of the effective confining stress is fundamental for the design of reservoir development, besides the predictability of its behavior. In this paper, a strong discontinuity approach to embed discontinuities into finite elements was adopted to represent the behavior of fractures in rock formations. To properly derive embedded discontinuity finite element formulations, fundamental aspects regarding to the kinematics and statics of the discontinuity must be considered. The kinematic enrichment must correctly reflect the position of the interface in the element as well as the relative displacement (opening and sliding) between the two opposite faces of the interface. Furthermore, the traction continuity condition must be properly imposed to ensure a correct relationship between the tractions in the internal interface and the stresses in the surrounding continuum portion. The simulation of the problem of closing natural fractures by reservoir depletion was carried out. A numerical tool was used to embed the natural fracture network into the finite element mesh, with respect to the geological mapping of these fractures. To model the mechanical behavior of material, it was adopted a hyperbolic model of fracture closure proposed by Barton & Bandis. It was possible to observe a decrease in the rate of production due to the collapse of the existing fractures that decreased the permeability around the production wells.Federal University of PernambucoSão Paulo State UniversitySão Paulo State UniversityUniversidade Federal de Pernambuco (UFPE)Universidade Estadual Paulista (UNESP)Beserra, L.Guimarães, L.Manzoli, O. L. [UNESP]Berrio, L.2022-04-28T19:29:10Z2022-04-28T19:29:10Z2018-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjecthttp://dx.doi.org/10.3997/2214-4609.20180215616th European Conference on the Mathematics of Oil Recovery, ECMOR 2018.http://hdl.handle.net/11449/22150910.3997/2214-4609.2018021562-s2.0-85088074415Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPeng16th European Conference on the Mathematics of Oil Recovery, ECMOR 2018info:eu-repo/semantics/openAccess2022-04-28T19:29:10Zoai:repositorio.unesp.br:11449/221509Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:49:04.987285Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Finite element with embedded discontinuities analysis of well production decline due to fracture closure in naturally fr |
title |
Finite element with embedded discontinuities analysis of well production decline due to fracture closure in naturally fr |
spellingShingle |
Finite element with embedded discontinuities analysis of well production decline due to fracture closure in naturally fr Beserra, L. |
title_short |
Finite element with embedded discontinuities analysis of well production decline due to fracture closure in naturally fr |
title_full |
Finite element with embedded discontinuities analysis of well production decline due to fracture closure in naturally fr |
title_fullStr |
Finite element with embedded discontinuities analysis of well production decline due to fracture closure in naturally fr |
title_full_unstemmed |
Finite element with embedded discontinuities analysis of well production decline due to fracture closure in naturally fr |
title_sort |
Finite element with embedded discontinuities analysis of well production decline due to fracture closure in naturally fr |
author |
Beserra, L. |
author_facet |
Beserra, L. Guimarães, L. Manzoli, O. L. [UNESP] Berrio, L. |
author_role |
author |
author2 |
Guimarães, L. Manzoli, O. L. [UNESP] Berrio, L. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de Pernambuco (UFPE) Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Beserra, L. Guimarães, L. Manzoli, O. L. [UNESP] Berrio, L. |
description |
In naturally fractured reservoirs, the fractures may represent the main pathway for fluid flow. Therefore, the magnitude of fracture permeability plays a fundamental role in the productivity of such type of reservoir. In reservoirs sensitive to the stress state, the depletion due to production can lead to the closure of the fractures, as a function of the increase of effective confining stress, promoting a significant decrease in the overall permeability of the reservoir. Thus, understanding the hydraulic characteristics of the fracture network as a function of the effective confining stress is fundamental for the design of reservoir development, besides the predictability of its behavior. In this paper, a strong discontinuity approach to embed discontinuities into finite elements was adopted to represent the behavior of fractures in rock formations. To properly derive embedded discontinuity finite element formulations, fundamental aspects regarding to the kinematics and statics of the discontinuity must be considered. The kinematic enrichment must correctly reflect the position of the interface in the element as well as the relative displacement (opening and sliding) between the two opposite faces of the interface. Furthermore, the traction continuity condition must be properly imposed to ensure a correct relationship between the tractions in the internal interface and the stresses in the surrounding continuum portion. The simulation of the problem of closing natural fractures by reservoir depletion was carried out. A numerical tool was used to embed the natural fracture network into the finite element mesh, with respect to the geological mapping of these fractures. To model the mechanical behavior of material, it was adopted a hyperbolic model of fracture closure proposed by Barton & Bandis. It was possible to observe a decrease in the rate of production due to the collapse of the existing fractures that decreased the permeability around the production wells. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-01 2022-04-28T19:29:10Z 2022-04-28T19:29:10Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.3997/2214-4609.201802156 16th European Conference on the Mathematics of Oil Recovery, ECMOR 2018. http://hdl.handle.net/11449/221509 10.3997/2214-4609.201802156 2-s2.0-85088074415 |
url |
http://dx.doi.org/10.3997/2214-4609.201802156 http://hdl.handle.net/11449/221509 |
identifier_str_mv |
16th European Conference on the Mathematics of Oil Recovery, ECMOR 2018. 10.3997/2214-4609.201802156 2-s2.0-85088074415 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
16th European Conference on the Mathematics of Oil Recovery, ECMOR 2018 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808129465197264896 |