5932

5547

كارشناسي ارشد

مهندسي معدن

اصفهان: دانشگاه صنعتي اصفهان، دانشكده معدن

1389

دوازده،71ص.: مصور،جدول

ص.ع.به فارسي و انگليسي

عليرضا باغبانان، نادر فتحيان پور

حميدرضا هاشم الحسيني

28/2/90

مهندسي معدن

ID5547

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Fluid flow modeling in fractured rocks Amir Joolaei a joolaei@mi iut ac ir Date of Submission 2011 03 14 Department of Mining Engineering Isfahan University of Technology Isfahan84156 83111 Iran Degree M Sc Language Farsi Alireza Baghbanan Bagh110@cc iut ac ir Nader fathianpoor fathian@cc iut ac ir Abstract In fractured rock masses when the permeability of intact rock matrix is negligible the main part of fluid flows through a connected Discrete Fracture Network DFN model Practical and theoretical studies show that the discrete fracture network models are the most appropriate model for fluid flow and particle transport modeling in fractured rocks for which an equivalent continuum model is difficult to establish The FRACIUT 2D and FRACIUT3D codes have been developed for generating of 2D and 3D DFN models based on the density function of geometrical properties of fractures such as fracture location aperture and orientation using Monte Carlo method A large number of 3D DFN realizations in different block sizes and fracture shapes such as elliptical circular or polynomial may be generated and visualized in FRACIUT 3D code Down scaling modeling with different sizes in different orientation is also available in FRACIUT 2D models For fluid flow simulation in 2D and 3D fractured rocks two different numerical codes FLUIUT2D and FLUIUT3D codes were developed respectively Both codes are able to determine the intersections between the fracture traces and planes All fracture networks in 2D and 3D are regularized and therefore single isolated and not connected segments which do not have any contribution in fluid flow are discarded A pipe network modeling are considered for fluid flow modeling in FLUIUT3D codes in which an equivalent pipe is located in DFN models instead of each fracture plane Using numerical Discrete Element Method DEM fluxes are determined and permeability tensor of fracture network is calculated The calculated permeability by FLUIUT 2D is well fitted with results of fluid flow simulation using commercial code UDEC It has also shown that the calculated permeability by FLUIUT3D code when the polynomial fracture shape is considered is significantly different from the circular shape which is most popular form in other commercial codes Key words Discrete Fracture Network Monte Carlo Algorithm Fluid Flow Modeling Permeability

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