Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
Detection of Calcium Carbonate Precipitation by Sensors Based on Fiber Optic Bragg Networks
Submission Author:
Luila Saidler , ES
Co-Authors:
Luila Saidler, Bruno Loureiro, Renato Siqueira, Arnaldo Leal Junior, Leandro Macedo
Presenter: Luila Saidler
doi://10.26678/ABCM.ENCIT2022.CIT22-0468
Abstract
Scale has been recognized as a major operational problem in oil production. This mineral deposition comes from the accumulation of inorganic salts and interferes with the guarantee of flow, causing production losses and equipment changes. In particular, the precipitation of calcium carbonate (CaCO3) can occur from the incompatibility between the chemical compositions of the formation and injection waters and/or by the thermodynamic changes of the system during production. In this scenario, estimating the mass of precipitated crystals as a function of operational variables is necessary to propose actions to mitigate scale in producing wells. The fiber optic sensor technology based on Fiber Bragg Gratings (FBG) has been used in several important application areas from the measurement of spectral variations. These sensors have intrinsic sensitivity to variations of temperature and deformation, thus, they are important devices for the sensing of several physical quantities. The aim of this article, therefore, is to present the response of fiber optic systems to the measurement of deposited mass of CaCO3 crystals. The experimental setup for this study consists of a reservoir for mixing aqueous solutions of NaHCO3 and CaCl2, under controlled temperature conditions, a precision balance to measure the mass of crystals formed, an optical interrogator, a computer and a part developed in 3D printer to receive the inlay coupons with the FBG sensors. The results are used to establish a correlation between the optical fiber sensor response and the precipitated CaCO3 mass, in order to develop a method of measuring mass accumulation rates through optical fiber sensor systems.
Keywords
Calcium carbonate scaling, oil production, fiber bragg gratings sensors
