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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
Effect of barium sulphate precipitation in a pressurized environment
Submission Author:
Vitória Felicio Dornelas , ES
Co-Authors:
Vitória Felicio Dornelas, Cristiano Severo AIolfi, Valéria Santos, Daniel Ribeiro, Fabio de Assis Ressel Pereira, Andre Leibsohn Martins, Ana Paula Meneguelo
Presenter: Vitória Felicio Dornelas
doi://10.26678/ABCM.ENCIT2020.CIT20-0668
Abstract
Currently, the oil sector is facing new challenges, such as ultra-deep waters and pre-salt. One of the main concerns is the inorganic precipitation in production equipment. Precipitation can occur throughout the oil production chain, from the reservoir to the surface facilities. The most common type of scale in the region close to the reservoir is barium sulphate due to its low solubility. This work proposes an experimental study that aims to monitor the effect of barium sulphate precipitation on the petrophysical properties of Berea Buff type samples such as, porosity and permeability. Unlike other works in the area, this study used a simpler methodology to observe the impact of the precipitation reaction. At the end of the experiment, there was a reduction in the two petrophysical properties studied, porosity and permeability. In addition, the decay of the concentration of chloride ions, indicate the consumption of the reagents and the consequent production of barium sulphate in the porous medium. Were observed a reduction of 11,7% in the permeability and 7,9% in porosity. However, tomography analyses were needed to better understand which form and local barium sulfate form a scale in the porous medium.
Keywords
Barium sulphate, permeability, Porosity, Inorganic scale
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