Abstract

A mathematical model to predict the dissolution of salt particles suspended in a brine flow is provided. The model consists of a system of three partial differential equations (PDE) based on mass conservation of salt dissolved in the fluid phase, on mass conservation of salt particles in the solid phase and on the overall conservation of energy. A fluid flow experimental unit was built to determine the kinetics of the dissolution of salt particles in a brine flow. Fluid samples free from particled solid material retrieved through the flow line at several predefined points were collected to determine salt dissolution profile. The global convective mass transfer coefficient was evaluated based on the experimental data. Simulations validated the mathematical model and relative deviations between experimental data and simulations were less than 10%.

Highlights

  • The exploration of oil reservoirs in the pre-salt layer provides relevant technological challenges that stem from the technical difficulties the region posits

  • Current paper models the dissolution in systems composed of salt particles in brine flowing in eaves

  • Current researchers designed and built an experimental fluid flow loop where particles of salt could dissolve along the eaves so that the mathematical model could be validated

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Summary

Introduction

The exploration of oil reservoirs in the pre-salt layer provides relevant technological challenges that stem from the technical difficulties the region posits. Their application is limited due to high costs and degree of aggression to the environment. Another way of reducing the salt dissolution effect is to use water saturated as fluid. Morse and Arvidson (2002) studied the dissolution of carbonate minerals on the surface of earth considering the same concept around the mass transfer coefficient. Current paper models the dissolution in systems composed of salt particles in brine flowing in eaves. Current researchers designed and built an experimental fluid flow loop where particles of salt could dissolve along the eaves so that the mathematical model could be validated. The model was developed in one-dimensional cartesian coordinates for fluid and solid particle flow

Material and methods
Experiments
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