Multiscale Simulation of Acid Treatment in a Carbonate Reservoir

The problem of acid treatment in carbonate reservoirs at different scales is considered. The problem of two-phase multicomponent Darcy flow through a porous medium with chemical reactions is solved at the core scale. The regimes of acid injection into the core that lead to the wormholing phenomena a...

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Bibliographic Details
Published inFluid dynamics Vol. 57; no. 2; pp. 158 - 172
Main Authors Kanevskaya, R. D., Novikov, A. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.04.2022
Springer
Springer Nature B.V
Subjects
Acids
Carbonates
Chemical reaction, Rate of
Chemical reactions
Classical and Continuum Physics
Classical Mechanics
Electric properties
Engineering Fluid Dynamics
Fluid- and Aerodynamics
Mathematical models
Permeability
Physics
Physics and Astronomy
Porous media
Process parameters
Reaction kinetics
Reservoirs
Scale models
Two phase flow
Wormholes
fracture acidizing
acid treatment
reaction kinetics
multiscale simulation
wormholes
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Summary:The problem of acid treatment in carbonate reservoirs at different scales is considered. The problem of two-phase multicomponent Darcy flow through a porous medium with chemical reactions is solved at the core scale. The regimes of acid injection into the core that lead to the wormholing phenomena are investigated. The present study makes it possible to determine the wormhole growth rate at various reaction kinetics parameters and injection rates and for various permeability distributions. The dependences obtained are used in the large-scale model of fracture acidizing in a reservoir (FAR) that also includes the model of two-phase multicomponent flow with chemical reactions through a porous medium and the model of acid transport through a fracture. Additional contribution of wormholes to the conductivity is simulated. Based on the model proposed, a series of calculations of fracture acidizing in a reservoir is carried out, the effect of taking into account the wormholes in the large-scale model proposed is investigated, and the influence of the constitutive parameters of the process considered such as the fracture length, the reservoir permeability, and the solution injection rate on the effectiveness of treatment estimated in terms of the production ability of well after treatment is studied.
ISSN:0015-4628
1573-8507
DOI:10.1134/S0015462822020057