A theoretical model of air and steam co-injection to prevent the downward migration of DNAPLs during steam-enhanced extraction

Kaslusky, Scott F.; Udell, Kent S.

doi:10.1016/s0169-7722(01)00191-7

Cited by 30 publications

(20 citation statements)

References 7 publications

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“…Once the steam front reaches the NAPL zone, it instigates interphase mass transfer from the NAPL to the steam. Reverse mass transfer can occur in the form of re-condensation and accumulation of the vaporized NAPL at the steam front due to heat loss [141][142][143]. Several factors have been shown to impact NAPL mass transfer and recovery including, the presence of air with the steam [112], injection pressure [113] and field conditions such as soil type and well distance [144][145][146].…”

Section: Field Scalementioning

confidence: 99%

Interphase mass transfer between fluids in subsurface formations: A review

Agaoglu

Copty

Scheytt

et al. 2015

Advances in Water Resources

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Section: Field Scalementioning

confidence: 99%

Interphase mass transfer between fluids in subsurface formations: A review

Agaoglu

Copty

Scheytt

et al. 2015

Advances in Water Resources

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“…In [7], we showed that a solution of the system (26)- (28), satisfying (23) and (24) can only be a fast rarefaction with u = 1 in the steam region {x < vt } , with a shock at the SCF {x = vt } , and with two-phase Buckley-Leverett behavior in the cold region {x > vt } where S g = 0 (see figure 1).…”

Section: Hyperbolic Setting and Previous Resultsmentioning

confidence: 99%

“…Recently, there is renewed interest for the purpose of removing oil spills from the subsurface [3,19,20,23,37,38]. The processes involved are extremely complex and pose challenging questions concerning theory [12,26,45,46], experiment [13,24,43] and numerical modeling [1,5,8,11,[29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Traveling waves in a finite condensation rate model for steam injection

Bruining

Duijn

2006

Comput Geosci

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Steam drive recovery of oil is an economical way of producing oil even in times of low oil prices and is used worldwide. This paper focuses on the onedimensional setting, where steam is injected into a core initially containing oil and connate water while oil and water are produced at the other end. A three-phase (oil, water, steam) hot zone develops, which is abruptly separated from the two-phase (oil + water) cold zone by the steam condensation front. The oil, water and energy balance equations (Rankine-Hugoniot conditions) cannot uniquely solve the system of equations at the steam condensation front. In a previous study, we showed that two additional constraints follow from an analysis of the traveling wave equation representing the shock; however, within the shock, we assumed local thermodynamic equilibrium. Here we extend the previous study and include finite condensation rates; using that appropriate scaling requires that the Peclet number and the Damkohler number are of the same order of magnitude. We give a numerical proof, using a colorcoding technique, that, given the capillary diffusion behavior and the rate equation, a unique solution can be obtained. It is proven analytically that the solution for large condensation rates tends to the solution obtained assuming local thermodynamic equilibrium.

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“…Kaslusky and Udell (1985) studied heat transfer with phase change in the presence of capillary movement. More recently, Kaslusky and Udell (2002) studied flow through drying in the context of remediation of hydrocarbon-contaminated soils by a method called soil vapor extraction or soil venting. However, in all these studies the effect of compressibility of gas on drying rates is neglected.…”

Section: Introductionmentioning

confidence: 99%

Water removal from porous media by gas injection: experiments and simulation

2007

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The flow of a saturated gas through a porous medium, partially occupied by a liquid phase, causes evaporation due to gas expansion. This process, referred to as flow-through drying, is important in a wide variety of natural and industrial applications, such as natural gas production, convective drying of paper, catalysts, fuel cells and membranes. X-ray imaging experiments were performed to study the flow-through drying of water-saturated porous media during gas injection. The results show that the liquid saturation profile and the rate of drying are dependent on the viscous pressure drop, the state of saturation of the gas and the capillary characteristics of the porous medium. During the injection of a completely saturated gas, drying occurs only due to gas expansion. Capillary-driven flow from regions of high saturation to regions of low saturation lead to more uniform saturation profiles. During the injection of a dry gas, a drying front develops at the inlet and propagates through the porous medium. The experimental results are compared with numerical results from a continuum model. A good agreement is found for the case of sandstone. The comparison is less satisfactory for the experiments with limestone.

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A theoretical model of air and steam co-injection to prevent the downward migration of DNAPLs during steam-enhanced extraction

Cited by 30 publications

References 7 publications

Interphase mass transfer between fluids in subsurface formations: A review

Interphase mass transfer between fluids in subsurface formations: A review

Traveling waves in a finite condensation rate model for steam injection

Water removal from porous media by gas injection: experiments and simulation

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