A geochemical reaction-transport simulator for matrix acidizing analysis and design

Liu, Xinghui; Ormond, Anne; Bartko, Kirk; Li, Ying; Ortoleva, P.

doi:10.1016/s0920-4105(96)00064-2

Cited by 114 publications

(60 citation statements)

References 12 publications

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“…Conversely, precipitation-driven sealing is observed in tuff at a range of temperatures [9]. Gaping is observed in hydrocarbon reservoir rocks [10,11], and spontaneous or induced switching from sealing to gaping is reported at ambient temperatures ð208CÞ in limestone [12] and at modest temperatures (20-1208CÞ in novaculite [13]. These limited studies on fractures provide no conclusive view of the effects controlling the evolution of the transport properties, and the evolving rates and magnitudes of fracture permeability driven by interaction between the mechanical and chemical processes remain poorly constrained.…”

Section: Introductionmentioning

confidence: 99%

A numerical model simulating reactive transport and evolution of fracture permeability

Yasuhara

Elsworth

2006

Int. J. Numer. Anal. Meth. Geomech.

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SUMMARYA numerical model is presented to describe the evolution of fracture aperture (and related permeability) mediated by the competing chemical processes of pressure solution and free-face dissolution/precipitation; pressure (dis)solution and precipitation effect net-reduction in aperture and free-face dissolution effects netincrease. These processes are incorporated to examine coupled thermo-hydro-mechano-chemo responses during a flow-through experiment, and applied to reckon the effect of forced fluid injection within rock fractures at geothermal and petroleum sites. The model accommodates advection-dominant transport systems by employing the Lagrangian-Eulerian method. This enables changes in aperture and solute concentration within a fracture to be followed with time for arbitrary driving effective stresses, fluid and rock temperatures, and fluid flow rates. This allows a systematic evaluation of evolving linked mechanical and chemical processes. Changes in fracture aperture and solute concentration tracked within a wellconstrained flow-through test completed on a natural fracture in novaculite (Earth Planet. Sci. Lett. 2006, in press) are compared with the distributed parameter model. These results show relatively good agreement, excepting an enigmatic abrupt reduction in fracture aperture in the early experimental period, suggesting that other mechanisms such as mechanical creep and clogging induced by unanticipated local precipitation need to be quantified and incorporated. The model is applied to examine the evolution in fracture permeability for different inlet conditions, including localized (rather than distributed) injection. Predictions show the evolution of preferential flow paths driven by dissolution, and also define the sense of permeability evolution at field scale.

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Section: Introductionmentioning

confidence: 99%

A numerical model simulating reactive transport and evolution of fracture permeability

Yasuhara

Elsworth

2006

Int. J. Numer. Anal. Meth. Geomech.

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“…Among the different approaches proposed in the literature, we can cite the works of Hoefner and Fogler [18], Wang et al [40], Daccord et al [7], Liu et al [23] or Fredd and Fogler [10]. The reader can refer to the paper by Fredd and Miller [12] for a detailed presentation of these different models.…”

Section: Introductionmentioning

confidence: 99%

Core-scale description of porous media dissolution during acid injection - Part I: theoretical development

Golfier¹,

Bazin²,

Lenormand³

et al. 2004

Mat. apl. comput.

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Abstract. Dissolution mechanisms in porous media may lead to unstable dissolution fronts ("wormholing"). It has been shown in the literature that Darcy-scale models may reproduce all the characteristics of such dissolution patterns. This paper considers the core-scale averaged behavior of these Darcy-scale dissolution models. The form of core-scale equations is discussed based on the volume averaging of the Darcy-scale equations. The uncertainty about the choice of the unit cell (and boundary conditions) to solve the closure problems and the impact of the dissolution history on the core-scale properties is emphasized.Mathematical subject classification: 76V05, 76S05, 80A32.

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“…Steefel and Lasaga (19901, Ortoleva (1994) and Holstad (1995) presented similar rate expressions to represent the dissolution and precipitation-induced porosity variation. The validity and empirical parameters of these expressions have been determined by matching of the reaction-transport models to experimental data (Liu et al, 1997). The effect of scale formation or dissolution at the pore surface on the permeability of porous media has been investigated by several researchers, including Schechter and Gidley (1969) and Glover and Guin (19731, who developed mathematically complicated models based on the realization of porous media as a bundle of randomly distributed capillary tubes with a population, varying by surface reaction.…”

mentioning

confidence: 99%

Scale effect on porosity and permeability: Kinetics, model, and correlation

2001

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A geochemical reaction-transport simulator for matrix acidizing analysis and design

Cited by 114 publications

References 12 publications

A numerical model simulating reactive transport and evolution of fracture permeability

A numerical model simulating reactive transport and evolution of fracture permeability

Core-scale description of porous media dissolution during acid injection - Part I: theoretical development

Scale effect on porosity and permeability: Kinetics, model, and correlation

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