Spelling suggestions: "subject:"rocks permeability"" "subject:"rocks ermeability""
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The theoretical determination of the fluid potential distribution in jointed rocksCaldwell, Jack A 13 January 2015 (has links)
No description available.
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Multiscale flow and transport in highly heterogeneous carbonatesZhang, Liying, Bryant, Steven L. Jennings, James W., January 2005 (has links) (PDF)
Thesis (Ph. D.)--University of Texas at Austin, 2005. / Supervisors: Steven L. Bryant and James W. Jennings Jr. Vita. Includes bibliographical references.
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Scaling parameters for characterizing gravity drainage in naturally fractured reservoirMiguel-Hernandez, Nemesio 28 August 2008 (has links)
Not available / text
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Permeability evolution as a result of fluid-rock interactionAstakhov, Dmitriy Konstantinovich 05 1900 (has links)
No description available.
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Permeability studies in rock fracturesWong, Wing-yee, 黃詠儀 January 2002 (has links)
published_or_final_version / Applied Geosciences / Master / Master of Science
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Group invariant solutions for a pre-existing fracture driven by a non-Newtonian fluid in permeable and impermeable rockFareo, Adewunmi Gideon 02 May 2013 (has links)
A thesis submitted to the Faculty of Science, University of the
Witwatersrand, Johannesburg, South Africa, in fulfilment of the requirements for
the degree of Doctor of Philosophy, 2013. / The aim of the thesis is to derive group invariant, exact, approximate analytical and numerical
solutions for a two-dimensional laminar, non-Newtonian pre-existing hydraulic fracture propagating
in impermeable and permeable elastic media. The fracture is driven by the injection
of an incompressible, viscous non-Newtonian fluid of power law rheology in which the fluid
viscosity depends on the magnitude of the shear rate and on the power law index n > 0. By
the application of lubrication theory, a nonlinear diffusion equation relating the half-width of
the fracture to the fluid pressure is obtained.
When the interface is permeable the nonlinear diffusion equation has a leak-off velocity
sink term. The half-width of the fracture and the net fluid pressure are linearly related through
the PKN approximation. A condition, in the form of a first order partial differential equation
for the leak-off velocity, is obtained for the nonlinear diffusion equation to have Lie point symmetries.
The general form of the leak-off velocity is derived. Using the Lie point symmetries
the problem is reduced to a boundary value problem for a second order ordinary differential
equation. The leak-off velocity is further specified by assuming that it is proportional to the
fracture half-width. Only fluid injection at the fracture entry is considered. This is the case of
practical importance in industry.
Two exact analytical solutions are derived. In the first solution there is no fluid injection
at the fracture entry while in the second solution the fluid velocity averaged over the width of
the fracture is constant along the length of the fracture. For other working conditions at the
fracture entry the problem is solved numerically by transforming the boundary value problem
to a pair of initial value problems. The numerical solution is matched to the asymptotic solution
at the fracture tip. Since the fracture is thin the fluid velocity averaged over the width
of the fracture is considered. For the two analytical solutions the ratio of the averaged fluid
velocity to the velocity of the fracture tip varies linearly along the fracture. For other working
conditions the variation is approximately linear. Using this observation approximate analytical
solutions are derived for the fracture half-width. The approximate analytical solutions are
compared with the numerical solutions and found to be accurate over a wide range of values
of the power-law index n and leak-off parameter β.
The conservation laws for the nonlinear diffusion equation are investigated. When there
is fluid leak-off conservation laws of two kinds are found which depend in which component
of the conserved vector the leak-off term is included. For a Newtonian fluid two conservation
laws of each kind are found. For a non-Newtonian fluid the second conservation law does
not exist. The behaviour of the solutions for shear thinning, Newtonian and shear thickening
fluids are qualitatively similar. The characteristic time depends on the properties of the fluid
which gives quantitative differences in the solution for shear thinning, Newtonian and shear
thickening fluids.
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Hydraulic fracture with Darcy and non-Darcy flow in a porous mediumNchabeleng, Mathibele Willy January 2017 (has links)
A dissertation submitted to the Faculty of Science,University of the
Witwatersrand, in fulfilment of the requirements for the
degree of Master of Science.
December 2016. / This research is concerned with the analysis of a two-dimensional Newtonian
fluid-driven
fracture in a permeable rock. The
fluid
flow in the fracture is laminar and the fracture
is driven by the injection of a Newtonian
fluid into it. Most of the problems in litera-
ture involving
fluid
flow in permeable rock formation have been modeled with the use
of Darcy's law. It is however known that Darcy's model breaks down for
flows involv-
ing high
fluid velocity, such as the
flow in a porous rock formation during hydraulic
fracturing. The Forchheimer
flow model is used to describe the non-Darcy
fluid
flow
in the porous medium. The objective of this study is to investigate the problem of a
fluid-driven fracture in a porous medium such that the
flow in the porous medium is
non-Darcy. Lubrication theory is applied to the system of partial di erential equations
since the fracture that is considered is thin and its width slowly varies along its length.
For this same reason, Perkins-Kern-Nordgren approximation is adopted. The theory of
Lie group analysis of differential equations is used to solve the nonlinear coupled sys-
tem of partial differential equations to obtain group invariant solutions for the fracture
half-width, leak-o depth and length of the fracture. The strength of
fluid leak-off at
the fracture wall is classi ed into three forms, namely, weak, strong and moderate. A
group invariant solution of the traveling wave form is obtained and an exact solution for
the case in which there is weak
fluid leak-off at the interface is found. A dimensionless
parameter, F0, termed the Forchheimer number was obtained and investigated. Nu-
merical results are obtained for both the case of Darcy and non-Darcy
flow. Computer
generated graphs are used to illustrate the analytical and numerical results. / MT2017
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A laboratory facility for testing the performance of borehole plugs in rocks subjected to polyaxial loadingCobb, Steven Lloyd January 1981 (has links)
No description available.
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Lithofacies control of porosity trends, Leduc formation, Golden Spike reef complex, AlbertaMcGillivray, J.G. January 1970 (has links)
No description available.
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Seismic velocities in porous rocks : direct and inverse problems/Cheng, Chuen Hon Arthur January 1978 (has links)
Thesis. 1978. Sc.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Science. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND LINDGREN. / Vita. / Bibliography: leaves 212-219. / by Cheng, Chuen Hon Arthur. / Sc.D.
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