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Numerical modeling of hydraulic frac...
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Pak, Ali.
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Numerical modeling of hydraulic fracturing.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Numerical modeling of hydraulic fracturing./
作者:
Pak, Ali.
面頁冊數:
231 p.
附註:
Source: Dissertation Abstracts International, Volume: 58-09, Section: B, page: 5094.
Contained By:
Dissertation Abstracts International58-09B.
標題:
Geotechnology. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ21618
ISBN:
9780612216181
Numerical modeling of hydraulic fracturing.
Pak, Ali.
Numerical modeling of hydraulic fracturing.
- 231 p.
Source: Dissertation Abstracts International, Volume: 58-09, Section: B, page: 5094.
Thesis (Ph.D.)--University of Alberta (Canada), 1997.
Hydraulic fracturing is a widely used method for enhancing oil extraction in the petroleum industry. Application of this method has been extended from rocks to porous media such as oilsand. In spite of the technological advances in the techniques of in-situ hydraulic fracturing, the industry lacks a realistic and reliable numerical model in order to design a cost-effective and efficient hydraulic fracturing treatment. This is due to the complex interactions among the different mechanisms that are involved in hydraulic fracturing, namely ground deformation, fluid flow, heat transfer and fracturing process.
ISBN: 9780612216181Subjects--Topical Terms:
1018558
Geotechnology.
Numerical modeling of hydraulic fracturing.
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Thesis (Ph.D.)--University of Alberta (Canada), 1997.
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Hydraulic fracturing is a widely used method for enhancing oil extraction in the petroleum industry. Application of this method has been extended from rocks to porous media such as oilsand. In spite of the technological advances in the techniques of in-situ hydraulic fracturing, the industry lacks a realistic and reliable numerical model in order to design a cost-effective and efficient hydraulic fracturing treatment. This is due to the complex interactions among the different mechanisms that are involved in hydraulic fracturing, namely ground deformation, fluid flow, heat transfer and fracturing process.
520
$a
In modeling the hydraulic fracturing process in a multiphase medium in a non-isothermal condition, three governing partial differential equations of equilibrium, continuity of fluid flow, and heat transfer are solved simultaneously in a fully implicit (coupled) manner using the finite element method. In order to model discrete fractures the node splitting technique and 6-node isoparametric rectangular fracture elements are used. The fracture element is capable of transmitting fluid and heat as well as modeling the leak-off of fluid from the fracture into the surrounding material.
520
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The thermal hydro-mechanical fracture finite element model developed in this research has been verified by comparing the numerical results with existing analytical and numerical solutions for thermal consolidation problems. The model was also validated by simulating large scale hydraulic fracture laboratory experiments.
520
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The numerical results from modeling large scale hydraulic fracture tests agree well with the experimental observations which indicate that fracture propagation in the uncemented granular materials (such as oilsand) can be different from fracture in rocks and other cemented materials. In granular materials, a fracture zone is more likely to occur rather than a distinct planar fracture. The numerical model emphasizes the importance of the pore fluid pressures in the initiation and propagation of fractures in the soils. Elastic and elastoplastic analysis show that in uncemented porous materials, tensile fracture and shear failure occur simultaneously due to the effect of high pore pressure.
520
$a
The developed model can be used in other engineering applications such as well communication problem, geotechnical aspects of temperature variation in soils, study of hydraulic fracturing in embankment dams, and increasing soil permeability through hydraulic fracturing for remediation of contaminated sites.
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School code: 0351.
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