Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Experimental and Theoretical Characterization of Thermophysical Properties and Electrical Permittivity of CO2 and Dodecane Mixtures
Submission Author:
Erich Takenore Tiuman , PR
Co-Authors:
Erich Takenore Tiuman, Jean Paulo Nakatu Longo, Felipe Kneip Marozo, David Kabacznik , Eduardo Nunes dos Santos, Marco Jose Da Silva, Rigoberto Morales, Moisés Marcelino Neto
Presenter: Erich Takenore Tiuman
doi://10.26678/ABCM.COBEM2023.COB2023-0551
Abstract
Multiphase flow meter (MPFM) is a device used to measure the flow rate of multiple fluids in a single pipe. It is an important tool for measuring the production, distribution and consumption of oil and gas in an efficient manner. All current MPFMs require accurate fluid properties as part of their PVT configuration in order to deliver accurate flow rate of production fluids. Due to recent discoveries of pre-salt and its characteristics of having a high content of carbon dioxide the need of evaluating the performance of nowadays technologies related to flow meters' behavior in presence of high content of CO2 was created. The molar fraction of CO2 in these fields can reach 80%. For this reason, investigating the impact of carbon dioxide content in the thermophysical properties of a multiphase mixture and consequently also the impact in the performance of flow meters has received much attention these days. In this work, we conduct an experimental and theoretical study of thermophysical properties (electrical permittivity, density, solubility and viscosity) of a mixture composed by dodecane and carbon dioxide, as model fluids. A test bench has been developed with a circuit for circulation of the mixture and measurements of the properties aforementioned. This test bench operates with a range of temperature from 5 to 80°C, pressure from 1 to 170 bar and content of CO2 from 0 to 100%. With the experimental points, it will be possible to evaluate the influence of CO2 and there will be enough data to calibrate an equation of state that will be implemented as a second part of the work. The theoretical study will be the implementation and calibration of an equation of state (EoS) using the experimental data obtained from the test bench. The EoS that will be implemented shall be the Cubic Plus Association and the parameter to be calibrate shall be the binary interaction parameters of this equation also known as kij. With all these experimental and theorical study it will be possible to evaluate the influence of carbon dioxide content on parameters of solubility, viscosity, electrical permittivity and density as well as to evaluate the impact of high CO2 content on the performance of multiphase flow meters.
Keywords
multiphase flow metering, equation of state, Carbon dioxide
