Papers by Jorge Luis Balino
Nonlinear Stability Analysis for Severe Slugging in an Air-Water Two-Phase Flow
Social Science Research Network, 2022
Experimental study of horizontal annular channels under non-developed conditions
Thermal Effects in Multiphase Flow Analysis for Offshore Oil Systems
Lecture notes in mechanical engineering, 2022
Stability Solver For Offshore Oil Flows
An offshore flow system is designed to operate at steady state. However, it is possible that this... more An offshore flow system is designed to operate at steady state. However, it is possible that this condition does not exist. The stability of an offshore flow system depends on the set of parameters that defines the operational state and can be numerically determined. The stationary solution is given as initial condition for the numerical simulation; if the numerical solution does not go away from the initial condition with time, the stationary solution is stable and it is the system steady state. If the numerical solution goes away with time, the stationary state is unstable, there is no steady state and an oscillatory solution develops. As a numerically cost efficient alternative to time simulations, the linear stability theory is a powerful technique to identify the stable and unstable regions. This paper presents the main features of a stability solver developed for oil production systems. Numerical results are presented for two oil fields. Stability maps are obtained and compare to field data. The comparison showed an excellent agreement with the operational conditions presented.
Numerical Analysis of Linear Thermal Expansion of Pipes During the Thermal Transient
Proceedings of the ... International Congress of Mechanical Engineering, 2015
Montagem do laboratório multipropósito de escoamentos multifásicos e projeto de experimentos de intermitência severa
Resumos, 2012
Journal of Petroleum Science and Engineering, Dec 1, 2018
Most of the applications dealing with multiphase flow applied to petroleum production systems ass... more Most of the applications dealing with multiphase flow applied to petroleum production systems assume a steady state operation, mainly because this is the condition envisaged in the design stage; nevertheless, steady state may not exist, resulting in a unstable behavior. Flow dynamic studies are far more complex because they involve issues related to modeling, mathematical well-posedness and adherence to transient field data. The stability of multiphase flows is usually studied by using commercial computer codes as a black box; this approach is computationally costly if many operating points have to be investigated, as in the design stage of offshore systems. As a more efficient alternative to time domain simulations, the linear stability analysis is a powerful technique to identify the stable and unstable regions. In this paper a stability solver, suitable for oil-gas-water production fluids in offshore oil production systems, is presented. The solver is based on a linear stability analysis applied to a dynamic model. Black oil approximation is considered for the mass transfer between the oil and gas phases. Numerical results were presented for three offshore oil production systems. Stability maps were obtained and compared to field data, showing an excellent agreement with the operational conditions presented.
Nonlinear stability analysis for severe slugging in an air–water two-phase flow
International Journal of Multiphase Flow, Feb 1, 2023
Journal of Petroleum Science and Engineering, Sep 1, 2020
This work is an improvement of a previous work ) by including a tubing as a subsystem of the pipe... more This work is an improvement of a previous work ) by including a tubing as a subsystem of the pipeline-riser system, a realistic choke valve model to predict the two-phase critical flow and pressure drop before the separator and boundary conditions between stretches of the geometry, in order to improve the determination of the stability boundary. The improved stability solver is applied for a three phase flow (gas, oil and water). Stability for operational points obtained from actual measurements are successfully predicted with the stability maps generated by the solver considering the tubing connected to the Wet Christmas Tree (WCT). A parametric analysis is made in order to evaluate a choke valve influence over stability maps. The stability maps are built by using field conditions at Santos and Campos basins (Brazil). The numerical results present a good agreement with numerical data and real operational conditions. The analysis to evaluate and verify the choke valve influence over stabilization shows a good agreement with the expected behavior.
Assessment of Uncertainties and Parameter Estimation in a Offshore Gas Pipeline
Lecture notes in mechanical engineering, Jul 19, 2018
Natural gas has a great importance in actual economy, and its transport is done usually through p... more Natural gas has a great importance in actual economy, and its transport is done usually through pipeline networks. The operation of a gas pipeline uses numerical models for calculation of intermediate properties, prediction of future behavior and estimation of the integrated flow capacity. These models are based on physical assumptions, closure laws and field measurements of boundary conditions such as pressure, flow, temperature and composition of the natural gas. This paper presents a development proposed for state and parameter estimation based on the implementation of an extended Kalman filter, in order to determine appropriate values for the flow parameters and use of complementary measurements in the boundary conditions. These results are compared to the ones obtained by using the Equal Error Fraction Method. It was found reduced pressure and flow systematic errors when the Kalman filter was used to estimate parameters.
Two-phase virtual flow rate meter: experimental evaluation under intermittent flow
In this study, a mathematical model is proposed to investigate the dynamics of gas, oil and water... more In this study, a mathematical model is proposed to investigate the dynamics of gas, oil and water flow in a pipeline-riser system. The pipeline is modeled as a lumped parameter system and considers two switchable states, one in which the gas is able to penetrate into the riser, and another in which there is a liquid accumulation front, preventing the gas from penetrating the riser. The riser model considers a distributed parameter system, in which movable nodes are used to evaluate local conditions along the subsystem. The method of characteristics allows the simplification of the differentiation in the hyperbolic system of equations obtained. The resulting equations are discretized and integrated using an implicit method with a predictor-corrector scheme for the treatment of the nonlinearities. Simulations corresponding to severe slugging conditions are presented. As result of the simulations, pressure, volume fractions and superficial velocities for the phases along the tubes are calculated.
Engenharia térmica, Dec 31, 2004
To carry out sensitivity analysis on a finned surface, the differential perturbative method is ap... more To carry out sensitivity analysis on a finned surface, the differential perturbative method is applied in a heat conduction problem within a thermal system, made up of a onedimensional circumferential fin on a nuclear fuel element. The model is described by the temperature distribution equation and the further specific boundary conditions. The adjoint system is used to determine the sensitivity coefficients for the case of interest. Both, the direct model and the resultant equations of the perturbative formalism are solved. The convective heat flow rate of the fin and the average excess temperature were the response functionals studied. The half thickness, the thermal conductivity and heat transfer coefficients, and the excess temperature at the base of the fin were the parameters of interest for the sensitivity analysis. The results obtained through the perturbative method and the direct variation had, in a general form and within acceptable physical limits, good concordance and excellent representativeness for the analyzed cases. It evidences that the differential formalism is an important tool for the sensitivity analysis and also it validates the application of the methodology in heat transmission problems on extended surfaces. The method proves to be necessary and efficient while elaborating thermal engineering projects
CFD study of the transient wet gas flow behavior through orifice plate flow meters
Flow Measurement and Instrumentation, Dec 1, 2021
Journal of Petroleum Science and Engineering, Aug 1, 2017
The flow of oil in pipes is, in general, a multiphase flow where water, oil, gas, emulsions and s... more The flow of oil in pipes is, in general, a multiphase flow where water, oil, gas, emulsions and sediments are transported in a co-current flow. Various complex phenomena, including mass transfer between phases, phase slip, friction pressure drop, variable geometry, compression, heat transfer and other thermodynamic effects make the flow modeling quite complex. Mixture models considering simplified empirical correlations derived from experimental observations, such as friction pressure drop and drift-flux models, are becoming increasingly used in the oil industry because of their good accuracy and simplicity. Fluid characterization is complex because it deals with multicomponent systems; therefore, empirical approaches such as black-oil models have been widely used. Modeling oil flows in real systems also requires suitable computer tools to solve equations that often need to be discretized in space and time and solved iteratively. In this paper, a stationary flow model based on a drift-flux formulation and a black-oil fluid model is developed. We present a method to integrate numerically the stationary equations and test the accuracy of a few drift-flux and two-phase multiplier correlations using steady state field data. Specifically a high pressure, three-phase flow system in deep water consisting of an offshore oil well with a 8, 000 m length, 6 in diameter pipeline-riser system located at Tupi oilfield (Santos basin, Brazil) is used as a case study. Results show that the proposed method, as well as the fluid and flow models adopted, is suitable for the analysis of stationary * Corresponding author.
Influence of thermal effects in stability analysis for severe slugging
Proceedings of the 26th International Congress of Mechanical Engineering, 2021
Stability Analysis for Severe Slugging Including Self-Lifting
SPE Journal, 2020
SummaryIn this paper we investigate stability for severe slugging including self-lifting by using... more SummaryIn this paper we investigate stability for severe slugging including self-lifting by using a stability solver. The stability solver is a tool in which a numerical linear stability analysis is applied to a mathematical model for a two-phase flow in a pipeline-riser system. The self-lifting approach is interesting because different configurations for the stationary state may occur. Depending on the system parameters, experiments show that two unstable regions may exist. Several parametric analyses are realized to evaluate the influence of self-lifting and to determine an optimal operational condition. Stability maps for severe slugging are built, and experimental data from literature are included, showing a very good agreement; in particular, the two unstable regions were satisfactorily predicted by the stability solver.
This paper shows distinctive features and some results obtained with a new numerical methodology ... more This paper shows distinctive features and some results obtained with a new numerical methodology for Computational Fluid Dynamics (CFD), which is the result of the right combination of Bond Graph concepts with elements of Numerical Methods. This methodology was used so far to model single-phase, single-component and single-phase, multicomponent flows. The main characteristics of this new methodology, called BG-CFD, are summarized. Some results of one-dimensional, single-component problems corresponding to heat conduction, convection-diffusion and compressible flows are discussed, showing that this methodology is a foundation of a bridge between Bond Graphs and CFD.
Linear stability analysis of two-phase flows in pipeline riser systems
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Papers by Jorge Luis Balino