Production Potential Changes During Sweep-Out in a Five-Spot System

Caudle, B.H.; Witte, Pascal

doi:10.2118/1334-g

Cited by 26 publications

(12 citation statements)

References 1 publication

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“…Early experiments in the quarter five-spot configuration, carried out by Simmons et al (1959), Caudle & Witte (1959), Lacey, Faris & Brinkman (1961) and Habermann (1960), demonstrated the decrease in displacement efficiency for adverse mobility ratios. While these authors observe fingering patterns that are qualitatively similar to those documented in the rectilinear experiments by Slobod & Thomas (1963), Perkins, Johnston & Hoffman (1965) and Wooding (1969), there are important differences in the way the governing mechanisms interact in these different geometries.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional miscible displacement simulations in homogeneous porous media with gravity override

Riaz

Meiburg

2003

J. Fluid Mech.

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High-accuracy three-dimensional numerical simulations of miscible displacements with gravity override in homogeneous porous media are carried out for the quarter five-spot configuration. Special emphasis is placed on describing the influence of viscous and gravitational effects on the overall displacement dynamics in terms of the vorticity variable. Even for neutrally buoyant displacements, three-dimensional effects are seen to change the character of the flow significantly, in contrast to earlier findings for rectilinear displacements. At least in part this can be attributed to the time dependence of the most dangerous vertical instability mode. Density differences influence the flow primarily by establishing a narrow gravity layer, in which the effective Péclet number is enhanced owing to the higher flow rate. However, buoyancy forces of a certain magnitude can lead to a pinch-off of the gravity layer, thereby slowing it down. Overall, an increase of the gravitational parameter is found to enhance mostly the vertical perturbations, while larger Pe values act towards amplifying horizontal disturbances. The asymptotic rate of growth of the mixing length varies only with Péclet number. For large Péclet numbers, an asymptotic value of 0.7 is observed. A scaling law for the thickness of the gravity layer is obtained as well. In contrast to immiscible flow displacements, it is found to increase with the gravity parameter.

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Section: Introductionmentioning

confidence: 99%

Three-dimensional miscible displacement simulations in homogeneous porous media with gravity override

Riaz

Meiburg

2003

J. Fluid Mech.

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“…1,2 While most investigations have addressed unidirectional flows, the quarter five-spot arrangement of injection and production wells represents the preferred configuration for evaluating the important role of localized sources and sinks on the flow. Already the early porous media experiments by Caudle and Witte, 3 Simmons et al, 4 Habermann, 5 and Lacey et al 6 show how, for unfavorable mobility ratios, the growth of viscous fingers adversely affects the sweep efficiency. The authors provide data for this efficiency measure at the time of breakthrough and beyond, as a function of the viscosity contrast between the fluids.…”

Section: Introductionmentioning

confidence: 99%

Miscible quarter five-spot displacements in a Hele-Shaw cell and the role of flow-induced dispersion

et al. 1999

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Miscible quarter five-spot displacements in a Hele-Shaw cell are investigated by means of experimental measurements and numerical simulations. The experiments record both the volumetric as well as the surface efficiency at breakthrough as a function of the dimensionless flow rate in the form of a Peclet number and the viscosity contrast. For small flow rates, both of these efficiency measures decrease uniformly with increasing Peclet numbers. At large flow rates, an asymptotic state is reached where the efficiencies no longer depend on the Peclet number. Up to Atwood numbers of approximately 0.5, the less viscous fluid occupies close to 23 of the gap width, which indicates a near-parabolic velocity profile across the gap. Consequently, in this parameter range a Taylor dispersion approach should be well suited to account for flow-induced dispersion effects. For larger viscosity contrasts, accompanying two-dimensional numerical simulations based on Taylor dispersion predict an increased stabilization for high flow rates, which is not confirmed by the experiments. This suggests that, in order to extend the range of applicability to larger viscosity contrasts, the components of the dispersion tensor will have to be amended in order to account for the presence of quasi-steady fingers.

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“…The areal sweep efficieney can be obtained from the work of Caudle and Witte (34) or Claridge(35). Figure 12, from Caudle and Witte (34) shows the areal sweep efficiency versus the viscosity ratio at breakthrough and at various pore volumes of injection.…”

Section: Dementioning

confidence: 99%

Carbon Dioxide Flooding — Fundamentals

Mungan¹

1984

Heavy Crude Oil Recovery

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Production Potential Changes During Sweep-Out in a Five-Spot System

Cited by 26 publications

References 1 publication

Three-dimensional miscible displacement simulations in homogeneous porous media with gravity override

Three-dimensional miscible displacement simulations in homogeneous porous media with gravity override

Miscible quarter five-spot displacements in a Hele-Shaw cell and the role of flow-induced dispersion

Carbon Dioxide Flooding — Fundamentals

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