Hydrodynamic thickness of petroleum oil adsorbed layers in the pores of reservoir rocks

Alkafeef, Saad F.; Algharaib, Meshal; Alajmi, Abdullah F.

doi:10.1016/j.jcis.2005.12.038

Cited by 17 publications

(20 citation statements)

References 31 publications

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“…Effectively slip is equivalent to increasing the pipe radius R by the slip length b to R + b. 2 Similar considerations are used to determine the thickness of adsorbate layers in porous media (Alkafeef et al 2006). …”

Section: Microscopic Origins Of Slipmentioning

confidence: 99%

Two-Phase Flow in Porous Media with Slip Boundary Condition

et al. 2008

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Flow in porous media described by Darcy's law extended to two-phase flow using the concept of relative permeabilities k r naturally assumes a maximum value of 0 ≤ k r ≤ 1. Reports in literature and our own experimental data show endpoint relative permeabilities k r > 1. In the porous medium, the flux of the non-wetting phase is in many cases about 2-4 times higher when a small amount of the wetting phase is present. Here, we draw an analogy between k r > 1 and a slip-boundary condition for the pore scale flow. We use a model description assuming flow in capillary tubes with a slip boundary condition. This model predicts that the flux increase due to slip depends on the equivalent capillary radius of the flow channels. Our k r data specifically follows this dependence indicating that slip is a plausible explanation for the observation of k r > 1.

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Section: Microscopic Origins Of Slipmentioning

confidence: 99%

Two-Phase Flow in Porous Media with Slip Boundary Condition

et al. 2008

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“…The reason may lie in the larger pore diameters and a completely open porous structure in ceramic. According to Poiseuille's law (R = 8 ηL × (π r4) – 1) where R denotes flow resistance, η viscosity, and L the length of the pores with radius r (Alkafeef et al 2006). Larger pore diameters give less flow resistance, thereby facilitating higher penetration.…”

Section: Discussionmentioning

confidence: 99%

Comparison of flanged and unflanged acetabular cup design

et al. 2010

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Background and purposeAdequate depth of cement penetration and cement mantle thickness is important for the durability of cemented cups. A flanged cup, as opposed to unflanged, has been suggested to give a more uniform cement mantle and superior cement pressurization, thus improving the depth of cement penetration. This hypothesis was tested experimentally.Materials and methodsThe same cup design with and without flange (both without cement spacers) was investigated regarding intraacetabular pressure, cement mantle thickness, and depth of cement penetration. With machine control, the cups were inserted into open-pore ceramic acetabular models (10 flanged, 10 unflanged) and into paired cadaver acetabuli (10 flanged, 10 unflanged) with prior pressurization of the cement.ResultsNo differences in intraacetabular pressures during cup insertion were found, but unflanged cups tended to migrate more towards the acetabular pole. Flanged cups resulted in thicker cement mantles because of less bottoming out, whereas no differences in cement penetration into the bone were observed.InterpretationFlanged cups do not generate higher cementation pressure or better cement penetration than unflanged cups. A possible advantage of the flange, however, may be to protect the cup from bottoming out, and there is possibly better closure of the periphery around the cup, sealing off the cement-bone interface.

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“…We can determine also an order of magnitude of the DC‐value of the streaming potential coupling coefficient of a sandstone filled with a polar oil. For the Berea sandstone (permeability ∼10 −13 m 2 , porosity ∼0.18), an analysis of the data displayed by Alkafeef et al. (2006) for the streaming current density versus the fluid pressure gradient yields C m −3 .…”

Section: Properties Of the Porous Materialsmentioning

confidence: 99%

“…(2006) for the streaming current density versus the fluid pressure gradient yields C m −3 . Alkafeef et al. (2006) used a crude oil containing asphaltene, a strongly polar polymer responsible for a high dielectric constant for this fluid.…”

Section: Properties Of the Porous Materialsmentioning

confidence: 99%

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Seismoelectric response of heavy oil reservoirs: theory and numerical modelling

Revil

Jardani²

2010

Geophysical Journal International

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International audienceWe consider a linear poroelastic material filled with a linear viscoelastic solvent like wet heavy oils (oil as opposed to water or brines is wetting the surfaces of the pores). We extend the electrokinetic theory in the frequency domain accounting for the relaxation effects associated with resonance of the viscoelastic fluid. The fluid is described by a generalized Maxwell rheology with a distribution of relaxation times given by a Cole–Cole distribution. We use the assumption that the charges of the diffuse layer are uniformly distributed in the pore space (Donnan model). The macroscopic constitutive equations of transport for the seepage velocity and the current density have the form of coupled Darcy and Ohm equations with frequency-dependent material properties. These equations are combined with an extended Frenkel–Biot model describing the deformation of the poroelastic material filled with the viscoelastic fluid. In the mechanical constitutive equations, the effective shear modulus is frequency dependent. An amplification of the seismoelectric conversion is expected in the frequency band where resonance of the generalized Maxwell fluid occurs. The seismic and seismoelectric equations are modelled using a finite element code with PML boundary conditions. We found that the DC-value of the streaming potential coupling coefficient is also very high. These results have applications regarding the development of new non-intrusive methods to characterize shallow heavy oil reservoirs in tar sands and DNAPL contaminant plumes in shallow aquifers

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Hydrodynamic thickness of petroleum oil adsorbed layers in the pores of reservoir rocks

Cited by 17 publications

References 31 publications

Two-Phase Flow in Porous Media with Slip Boundary Condition

Two-Phase Flow in Porous Media with Slip Boundary Condition

Comparison of flanged and unflanged acetabular cup design

Seismoelectric response of heavy oil reservoirs: theory and numerical modelling

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