Instantaneous Equilibrium Approximation Analysis

Jennings, Aaron A.; Kirkner, David J.

doi:10.1061/(asce)0733-9429(1984)110:12(1700)

Cited by 95 publications

(28 citation statements)

References 11 publications

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“…The Damkohler number has been used by others as an LEA validity criterion. Results of their analyses showed the LEA to be valid when the limiting Damkohler number was approximately 100 or greater [Jennings and Kirkner, 1984;Valocchi, 1985;Bahr and Rubin, 1987]. These results are in agreement with those reported herein.…”

Section: The Criterion Represented Insupporting

confidence: 85%

“…(22) is an absolute measure. It can be shown that LEA validity is, in fact, independent of P if a relative approach is employed [Jennings and Kirkner, 1984;Brusseau et al, 1989]. Thus the two sets of parameters influencing relative LEA validity for the MPNEG model are the/3 terms representing the three rate-limited mass transfer domains and the three Damkohler numbers associated with these domains.…”

Section: Heterogeneity (W)mentioning

confidence: 99%

“…These results are in agreement with those reported herein. Jennings and Kirkner [ 1984] reported a Damkohler number of 10 as being sufficient to produce a "reasonably good approximation" of LEA; this value is also in accord with the results presented above. It should be noted that, while the sensitivity analyses presented above were performed for one value of P and of R, the conclusions drawn from the analyses are applicable, in a relative sense, to all values of P and R.…”

Section: The Criterion Represented Inmentioning

confidence: 99%

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Transport of Organic Chemicals by Gas Advection in Structured or Heterogeneous Porous Media: Development of a Model and Application to Column Experiments

Brusseau¹

1991

Water Resources Research

116

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The use of soil venting or vacuum extraction for remediation of contaminated soil has lead to an increased interest in modeling gas‐phase processes. The majority of existing transport models have been developed assuming homogeneous porous media properties. It is well known, however, that the assumption of homogeneity will almost always be invalid for field systems. In addition, sorption has been described using the local equilibrium assumption. This assumption has also been shown to be invalid under certain conditions. A one‐dimensional model is presented that accounts for a structured or heterogeneous porous medium and for rate‐limited sorption. The model is designed for cases where transport occurs by advection and dispersion in the gas phase and where the liquid phase is immobile. A sensitivity analysis is presented, and parameter determination is discussed. The performance of the model was evaluated by comparing predicted simulations to data obtained from the literature. The model performed well, especially considering that the values for all input parameters were obtained independent of curve fitting.

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Section: The Criterion Represented Insupporting

confidence: 85%

Section: Heterogeneity (W)mentioning

confidence: 99%

Section: The Criterion Represented Inmentioning

confidence: 99%

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Transport of Organic Chemicals by Gas Advection in Structured or Heterogeneous Porous Media: Development of a Model and Application to Column Experiments

Brusseau¹

1991

Water Resources Research

116

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“…In reality, equilibrium-controlled desorption requires an infinitely fast desorption rate. However, if the critical interphase transfer rates are sufficiently fast, the equilibrium assumption can yield results indistinguishable from full kinetic modeling (Jennings and Kirkner 1984;Valocchi 1985;Bahr and Rubin 1987).…”

Section: Equilibrium-controlled Desorption In a Cdfmentioning

confidence: 99%

Leachate Testing and Evaluation for Freshwater Sediments. Long-Term Effects of Dredging Operations Program

Myers¹,

Brannon²,

Tardy³

et al. 1994

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“…Neglecting the dispersion effect, the transport equation for Nnd = 1 + (1.013 X 10 6 f l K u P ~ I 11 (14) particulate matter in the flowing solution is written as Substituting Eq.13 into Eq.S yields Eq.15 is subject to the foUowing initial and boundary conditions X pt comes across this pore throat. The pore throats can also be plugged due to bridging when the particle concentration in the (16) flowing solution is sufficiently high.…”

Section: Momentum Balance Equationmentioning

confidence: 99%

Predictability of Formation Damage by Modeling Chemical and Mechanical Processes

Chang

Civan

1992

SPE Formation Damage Control Symposium

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Previous modeling efforts in formation damage have A phenomenological model for formation damage by addressed some aspects of the penneability impairment phenomena. chemical and mechanical processes in petroleum reservoirs is The applicability of these models is limited to specific cases. Ohen presented. Geochemical reactions involving dissolution/precipitation and Civan 1 developed a phenomenological model to account for and ion exchange are modeled. The precipitates are considered fines migration and clay swelling during fluid flow through porous mobile and mixed with formation particles to contribute to the pore media. In their model, the ionic concentration and pH effects on throat plugging. Size distribution of both precipitates and clay fines fines release and deposition were not considered. The rate of is represented by a bimodal distribution function. A semi-empirical particle deposition and entrainment was assumed only approach is used to estimate the fraction of the plugged pore throats. hydrodynamically governed. Walsh et al. 2 developed a geochemical The mOdel parameters are determined through an optimization model to simulate the reactive fluid flow in porous media. Their method by matching the model predictions to laboratory core test model requires detailed information about the chemical reactions data.The capability and Validity of the model are demonstrated by comparing the predictions obtained from this model with experimental data for four cases. The predicted and the experimental data are shown to be in good agreement in each case. This model can be used for diagnosis, evaluation, and simulation of damage and alteration of reservoir formation during drilling. production, and chemical flooding processes.

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Instantaneous Equilibrium Approximation Analysis

Cited by 95 publications

References 11 publications

Transport of Organic Chemicals by Gas Advection in Structured or Heterogeneous Porous Media: Development of a Model and Application to Column Experiments

Transport of Organic Chemicals by Gas Advection in Structured or Heterogeneous Porous Media: Development of a Model and Application to Column Experiments

Leachate Testing and Evaluation for Freshwater Sediments. Long-Term Effects of Dredging Operations Program

Predictability of Formation Damage by Modeling Chemical and Mechanical Processes

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