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Multiscale Simulation of Acid Treatment in a Carbonate Reservoir

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 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Fluid Dynamics Springer Journals

Multiscale Simulation of Acid Treatment in a Carbonate Reservoir

Fluid Dynamics , Volume 57 (2) – Apr 1, 2022

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References (40)

Publisher
Springer Journals
Copyright
Copyright © Pleiades Publishing, Ltd. 2022. ISSN 0015-4628, Fluid Dynamics, 2022, Vol. 57, No. 2, pp. 158–172. © Pleiades Publishing, Ltd., 2022. Russian Text © The Author(s), 2022, published in Izvestiya RAN. Mekhanika Zhidkosti i Gaza, 2022, Vol. 57, No. 2, pp. 51–65.
ISSN
0015-4628
eISSN
1573-8507
DOI
10.1134/s0015462822020057
Publisher site
See Article on Publisher Site

Abstract

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.

Journal

Fluid DynamicsSpringer Journals

Published: Apr 1, 2022

Keywords: acid treatment; fracture acidizing; multiscale simulation; reaction kinetics; wormholes

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