A new technique to measure static and dynamic properties of a partially saturated porous medium

Ramakrishnan, T.S.; Cappiello, Achille

doi:10.1016/0009-2509(91)85109-b

Cited by 72 publications

(73 citation statements)

References 5 publications

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“…The shapes of these profiles constitute the principal fluid dynamical results of this work: they broadly agree with predictions that they be monotonic, nonintersecting, and convex; the expected capillary end effect, with vanishing exit hydrocarbon saturation, is clearly shown. We thus verify key assumptions of the method of Ramakrishnan and Cappiello (1991) for relative permeability measurement. Overall accuracy of the NMR method is assessed from comparison of the final profile with an independent gravimetric determination of final mean hydrocarbon saturation; these agree within 3% of pore volume.…”

Section: Alche Journal September 1993mentioning

confidence: 70%

“…With one empirical assumption in data fitting, we obtain hydrocarbon saturation profiles So ( y ) in an experiment similar to that of Ramakrishnan and Cappiello (1991), for various steady states with constant hydrocarbon flow rates incremented stepwise. The shapes of these profiles constitute the principal fluid dynamical results of this work: they broadly agree with predictions that they be monotonic, nonintersecting, and convex; the expected capillary end effect, with vanishing exit hydrocarbon saturation, is clearly shown.…”

Section: Alche Journal September 1993mentioning

confidence: 99%

“…A new steady-state technique for measuring some two-phase flow properties of a porous medium has recently been proposed (Ramakrishnan and Cappiello, 1991). The measurable properties of interest are nonwetting-phase relative permeability, capillary pressure and electrical resistivity.…”

Section: Introductionmentioning

confidence: 99%

“…In the embodiment described by Ramakrishnan and Cappiello (1991), only integral measurements are made, and no Correspondence concerning this should be addressed to E. 1. Fordham, who is on leave from Schlumberger Cambridge Research Ltd.…”

Section: Introductionmentioning

confidence: 99%

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Saturation gradients in drainage of porous media: NMR imaging measurements

et al. 1993

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A steady-state method recently proposed for measuring two-phase flow properties of a porous medium is supplemented by NMR imaging for measuring the saturation gradients which are allowed to persist in the specimen. The method relies on a strong capillary end effect which is assumed to be enforced by an outlet capillary pressure boundary condition, but direct verification of this has not hitherto been available. For constant flow rates, incremented stepwise, steady-state profiles of hydrocarbon saturation So are obtained which agree with predictions that they be monotonic, nonintersecting, and convex.Using D,O for the aqueous phase allows unambiguous detection of hydrocarbon by NMR, and imaging measurements of transverse relaxation time T2 were included in the protocol. T2 shows a dependence on So which is mild but not negligible for quantitative NMR imaging.

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Section: Alche Journal September 1993mentioning

confidence: 70%

Section: Alche Journal September 1993mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Saturation gradients in drainage of porous media: NMR imaging measurements

et al. 1993

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“…Capillary pressure and relative permeability of the displacing phase can be obtained from low-rate displacement experiments using the data reduction method devised by Ramakrishnan and Cappiello (1991). The method is designed for using pressure drop, flow rate, and average saturation data, all measured after many pore volumes of injection in unsteady-state displacements.…”

Section: Ramakrishnan-cappiello Methodsmentioning

confidence: 99%

Evaluation of methods for measuring relative permeability of anhydride from the Salado Formation: Sensitivity analysis and data reduction

Christiansen¹,

Kalbus

Howarth

1997

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Two‐phase flow properties of a sandstone rock for the CO₂/water system: Core‐flooding experiments, and focus on impacts of mineralogical changes

Manceau

Ma²,

Li³

et al. 2015

Water Resources Research

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The two-phase flow characterization (CO 2 /water) of a Triassic sandstone core from the Paris Basin, France, is reported in this paper. Absolute properties (porosity and water permeability), capillary pressure, relative permeability with hysteresis between drainage and imbibition, and residual trapping capacities have been assessed at 9 MPa pore pressure and 28 C (CO 2 in liquid state) using a single core-flooding apparatus associated with magnetic resonance imaging. Different methodologies have been followed to obtain a data set of flow properties to be upscaled and used in large-scale CO 2 geological storage evolution modeling tools. The measurements are consistent with the properties of well-sorted water-wet porous systems. As the mineralogical investigations showed a nonnegligible proportion of carbonates in the core, the experimental protocol was designed to observe potential impacts on flow properties of mineralogical changes. The magnetic resonance scanning and mineralogical observations indicate mineral dissolution during the experimental campaign, and the core-flooding results show an increase in porosity and water absolute permeability. The changes in two-phase flow properties appear coherent with the pore structure modifications induced by the carbonates dissolution but the changes in relative permeability could also be explained by a potential increase of the water-wet character of the core. Further investigations on the impacts of mineral changes are required with other reactive formation rocks, especially carbonate-rich ones, because the implications can be significant both for the validity of laboratory measurements and for the outcomes of in situ operations modeling.

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A new technique to measure static and dynamic properties of a partially saturated porous medium

Cited by 72 publications

References 5 publications

Saturation gradients in drainage of porous media: NMR imaging measurements

Saturation gradients in drainage of porous media: NMR imaging measurements

Evaluation of methods for measuring relative permeability of anhydride from the Salado Formation: Sensitivity analysis and data reduction

Two‐phase flow properties of a sandstone rock for the CO₂/water system: Core‐flooding experiments, and focus on impacts of mineralogical changes

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A new technique to measure static and dynamic properties of a partially saturated porous medium

Cited by 72 publications

References 5 publications

Saturation gradients in drainage of porous media: NMR imaging measurements

Saturation gradients in drainage of porous media: NMR imaging measurements

Evaluation of methods for measuring relative permeability of anhydride from the Salado Formation: Sensitivity analysis and data reduction

Two‐phase flow properties of a sandstone rock for the CO2/water system: Core‐flooding experiments, and focus on impacts of mineralogical changes

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Product

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Two‐phase flow properties of a sandstone rock for the CO₂/water system: Core‐flooding experiments, and focus on impacts of mineralogical changes