Impact of mixing induced calcite precipitation on the flow and transport

Citation

Material Information

Title:
Impact of mixing induced calcite precipitation on the flow and transport
Series Title:
Carbonates and Evaporites
Creator:
Bouhlila, Rachida
Laabidi, Ezzeddine
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Calcite Precipitation Reaction ( local )
Clogging Effect ( local )
Kinetic Of Precipitation Reaction ( local )
Porosity Change ( local )
Genre:
serial ( sobekcm )

Notes

Abstract:
In several hydrogeochemical situations, there is an interaction between the solid matrix and the carbonate species according to calcite dissolution and precipitation reactions (evaporate deposition in Sebkha and Chotts, calcite dissolution in seawater–freshwater mixing zone). The precipitation of such rocks can easily induce a development of the porosity and permeability as a result of the mixing processes of two different solutions. The purpose of this work is to present a relatively complete modeling tool to evaluate the porosity decrease during calcite precipitation and their impacts on the flow and transport. The modeling of such problem requires a set of highly nonlinearly coupled equations. GEODENS code, used in this work, can solve these equations by a finite element procedure. It can handle geochemical reactions such as mineral dissolution-precipitation reaction. The coupled model iteratively calculates the fluid pressure, the ion concentrations and the quantities of the different salts that may precipitate or dissolve in the domain over time. The porosity is calculated by considering the pore volume invaded during calcite precipitation in every node and each time step. The new porosity value is used to update the permeability using empirical model. The new hydrodynamic distribution is the new inputs for the next time step to solve the flow and reactive transport problem.
Original Version:
Carbonates and Evaporites, Vol. 32 (2016-04-28).

Record Information

Source Institution:
University of South Florida Library
Holding Location:
University of South Florida
Rights Management:
This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.

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University of South Florida
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