Publications
254 results found
Mathias SA, Zimmerman RW, 2003, Laplace transform inversion for late-time behavior of groundwater flow problems, WATER RESOURCES RESEARCH, Vol: 39, ISSN: 0043-1397
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- Citations: 5
Sisavath S, Al-Yaarubi A, Pain CC, et al., 2003, A simple model for deviations from the cubic law for a fracture undergoing dilation or closure, PURE AND APPLIED GEOPHYSICS, Vol: 160, Pages: 1009-1022, ISSN: 0033-4553
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- Citations: 95
Sisavath S, Al-Yaarubi A, Pain CC, et al., 2003, A simple model for deviations from the cubic law for a fracture undergoing dilation or closure, Pure and Applied Geophysics, Vol: 160, Pages: 1009-1022, ISSN: 0033-4553
Experimental observations show that flow through a fracture decreases more rapidly than the cube of the mean aperture (COOK, 1992). In order to provide a possible explanation of these experimental findings, we study creeping flow through a fracture of varying aperture that is symmetric about its midplane, using the power series of the stream function obtained by VAN DYKE (1987) for low Reynolds numbers. For the case of sinusoidally-varying walls, a simple expression relating the effective hydraulic aperture of the channel to the mean aperture and to the amplitude and wavelength of the sinusoidal wall profiles is obtained. Comparison is made to previous studies (KITANIDIS and DYKAAR, 1997) and to finite element calculations, and good agreement is obtained. The effect of fracture closure is then modelled as a decrease of the mean aperture without a change in the roughness. A power law relationship can be obtained between the flowrate and the mean aperture, with an exponent as high as 10, thus providing a potential mechanistic explanation of the experimental findings of PYRAK-NOLTE et al. (1987).
Mathias SA, Zimmerman RW, 2003, Laplace transform inversion for late-time behavior of groundwater flow problems, Water Resources Research, Vol: 39, ISSN: 0043-1397
Laplace transforms are widely used in solving groundwater flow problems. In the groundwater literature, it has frequently been asserted or assumed that the late-time behavior is governed by the behavior of the Laplace transform for small values of the Laplace variable. Careful reading of authoritative monographs on Laplace transforms shows that this correspondence does not generally hold. In this article the proper asymptotic formula is reviewed and is applied to the problem of water influx into a slab-like matrix block in a dual-porosity medium. In doing so, we clear up a long-standing discrepancy between the fracture/matrix transfer coefficient that has been calculated by Laplace methods and the coefficient which has been found by applying Fourier methods in the time domain.
G Grasselli, J Wirth, R W Zimmerman, 2003, Surface parameters for quantifying the hydro-mechanical anisotropy of rock discontinuities, Int. Congress on Rock Mechanics, Publisher: South African Institute of Mining and Metallurgy, Pages: 415-423
Lock PA, Jing XD, Zimmerman RW, et al., 2002, Predicting the permeability of sandstone from image analysis of pore structure, JOURNAL OF APPLIED PHYSICS, Vol: 92, Pages: 6311-6319, ISSN: 0021-8979
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- Citations: 66
Grattoni CA, Al-Sharji HH, Dawe RA, et al., 2002, Segregated pathways mechanism for oil and water flow through an oil-based gelant, JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING, Vol: 35, Pages: 183-190, ISSN: 0920-4105
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- Citations: 9
Yang CH, Grattoni CA, Muggeridge AH, et al., 2002, Flow of water through channels filled with deformable polymer gels, JOURNAL OF COLLOID AND INTERFACE SCIENCE, Vol: 250, Pages: 466-470, ISSN: 0021-9797
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- Citations: 16
Grattoni CA, Jing XD, Zimmerman RW, 2002, Wettability alteration by aging of a gel placed within a porous medium, 6th International Symposium on Reservoir Wettability and Its Effect on Oil Recovery, Publisher: ELSEVIER SCIENCE BV, Pages: 135-145, ISSN: 0920-4105
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- Citations: 4
Sisavath S, Jing XD, Pain CC, et al., 2002, Creeping flow through an axisymmetric sudden contraction or expansion, JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, Vol: 124, Pages: 273-278, ISSN: 0098-2202
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- Citations: 38
R Al-Mjeni, F Günzel, X D Jing, et al., 2002, The influence of clay fraction on the complex impedance of shaly sands, 2002 International Conference Society of Core Analysts
G Grasselli, J Wirth, R W Zimmerman, 2002, Functional parameters for quantifying the surface anisotropy of rock discontinuities, Rotterdam, Int. Symp. Rock Engineering in Mountainous Regions, Publisher: A. A. Balkema, Pages: 715-721
G P Karmakar, C A Grattoni, R W Zimmerman, 2002, Relative permeability modification using an oil-soluble gelant to control water (SPE 77414), Dallas, 2002 SPE International Oil and Gas Conference, Publisher: Society of Petroleum Engineers
Sisavath S, Jing XD, Zimmerman RW, 2001, Creeping flow through a pipe of varying radius, PHYSICS OF FLUIDS, Vol: 13, Pages: 2762-2772, ISSN: 1070-6631
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- Citations: 57
Grattoni CA, Al-Sharji HH, Yang CH, et al., 2001, Rheology and permeability of crosslinked polyacrylamide gel, JOURNAL OF COLLOID AND INTERFACE SCIENCE, Vol: 240, Pages: 601-607, ISSN: 0021-9797
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- Citations: 143
Moysset L, Fernández E, Cortadellas N, et al., 2001, Intracellular localization of phytochrome in Robinia pseudoacacia pulvini., Planta, Vol: 213, Pages: 565-574, ISSN: 0032-0935
The intracellular localization of phytochrome in the pulvini of Robinia pseudoacacia L. was analyzed by immunogold electron microscopy after red (R; 15 min) and far-red (FR; 5 min) irradiation 2 h after the beginning of the photoperiod. Screening of the available antibodies by immunoblotting demonstrated that none of the oat (Avena sativa L.) anti-phytochrome A (phy A) monoclonal antibodies) (MAbs) detected Robinia phytochrome. A putative Robinia phy A was detected by immunoblotting using a MAb to mustard (Sinapis alba L.) phy A (CP 2/9). No cross-reactivity was observed in blots probed with a MAb against Cucumis sativus L. phy B (mAT1). Ultrathin sections of LR White resin-embedded pulvini were immunolabelled with CP 2/9 MAb. The labelling was restricted to cortical cells and there was no evidence of labelling either in the vascular system or in the epidermis. The pattern of labelling was the same in both extensor and flexor cells irrespective of whether phytochrome was in the far-red-absorbing (Pfr) state or had reverted to the red-absorbing (Pr) form. Isolated labels and clusters of labels were randomly distributed throughout the cytoplasm. Gold particles were also found in the interior of nuclei, chloroplasts and mitochondria.
Grattoni CA, Jing XD, Zimmerman RW, 2001, Disproportionate Permeability Reduction When a Silicate Gel is Formed In-Situ to Control Water Production
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- Citations: 44
Al-Sharji HH, Grattoni CA, Dawe RA, et al., 2001, Disproportionate permeability reduction due to polymer adsorption entanglement
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- Citations: 20
Grattoni CA, Jing XD, Zimmerman RW, 2001, Disproportionate permeability reduction when a silicate gel is formed in-situ to control water production (SPE 69534), Richardson, Texas, SPE Latin American and Carribean petroleum engineering conference, Buenos Aires, Argentina, 25 - 28 March 2001, Publisher: Society of Petroleum Engineers
Yeo IW, Zimmerman RW, 2001, Accuracy of the renormalization method for computing effective conductivities of heterogeneous media, TRANSPORT IN POROUS MEDIA, Vol: 45, Pages: 129-138, ISSN: 0169-3913
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- Citations: 23
Sisavath S, Jing XD, Zimmerman RW, 2001, Laminar flow through irregularly-shaped pores in sedimentary rocks, TRANSPORT IN POROUS MEDIA, Vol: 45, Pages: 41-62, ISSN: 0169-3913
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- Citations: 39
Al-Sharji HH, Grattoni CA, Dawe RA, et al., 2001, Disproportionate permeability reduction due to polymer adsorption entanglement (SPE 68972), Richardson, Texas, SPE European formation damage conference, The Hague, The Netherlands, 21 - 22 May 2001, Publisher: Society of Petroleum Engineers
Al-Sharji HH, Grattoni CA, Dawe RA, et al., 2001, Disproportionate permeability reduction due to polymer adsorption entanglement (SPE 68972), Richardson, Texas, SPE European formation damage conference, The Hague, The Netherlands, 21 - 22 May 2001, Publisher: Society of Petroleum Engineers
Yang CH, Grattoni CA, Muggeridge AH, et al., 2000, A model for steady laminar flow through a deformable gel-coated channel, JOURNAL OF COLLOID AND INTERFACE SCIENCE, Vol: 226, Pages: 105-111, ISSN: 0021-9797
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- Citations: 16
Zimmerman RW, 2000, Coupling in poroelasticity and thermoelasticity, International Journal of Rock Mechanics and Mining Sciences, Vol: 37, Pages: 79-87, ISSN: 0148-9062
Bartosek, Grattoni CA, Stavland, et al., 2000, Relative Permeability Modification, Well Treatment and Water Shutoff by Polymer Gels, Editors: Zitha, Zitha, Delft, Publisher: Delft University Press, Pages: 1-117, ISBN: 9789040720451
Romero CE, Carter J, Gringarten AC, et al., 2000, A modified genetic algorithm for reservoir characterisation, SPE Int. Oil Gas Conf, Beijing, 7-10 Nov
Zimmerman RW, Yeo IW, 2000, Fluid flow in rock fractures: From the Navier-Stokes equations to the cubic law, Dynamics of Fluids in Fractured Rocks, Editors: Faybishenko, Benson, Witherspoon, Washington, DC, Publisher: American Geophysical Union, Pages: 213-224, ISBN: 9780875909806
Romero CE, Carter J, Gringarten AC, et al., 2000, A modified genetic algorithm for reservoir characterisation, SPE Int. Oil Gas Conf, Beijing, 7-10 Nov
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