A Simulator for Predicting Thermal Recovery Behavior Based on Streamline Method

Pasarai, Usman; Arihara, Norio

doi:10.2523/97411-ms

Cited by 3 publications

(2 citation statements)

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“…The latter are important in the numerical simulation of enhanced oil recovery processes such as steam flooding and in situ combustion. Relevant methodologies have been reported in recent papers by Christensen et al (2004), Nilsson et al (2005), Pasarai et al (2005), Huang et al (2007) and Liu et al (2007). Thermal process simulation also plays an important role in the modelling of geothermal reservoirs (the reader is referred to the recent survey by O' Sullivan et al (2001)).…”

Section: Introductionmentioning

confidence: 99%

The mathematical structure of multiphase thermal models of flow in porous media

et al. 2008

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This paper is concerned with the formulation and numerical solution of equations for modelling multicomponent, two-phase, thermal fluid flow in porous media. The fluid model consists of individual chemical component (species) conservation equations, Darcy's law for volumetric flow rates and an energy equation in terms of enthalpy. The model is closed with an equation of state and phase equilibrium conditions that determine the distribution of the chemical components into phases. It is shown that, in the absence of diffusive forces, the flow equations can be split into a system of hyperbolic conservation laws for the species and enthalpy and a parabolic equation for pressure. This decomposition forms the basis of a sequential formulation where the pressure equation is solved implicitly and then the component and enthalpy conservation laws are solved explicitly. A numerical method based on this sequential formulation is presented and used to demonstrate some typical flow behaviour that occurs during fluid injection into a reservoir.

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Section: Introductionmentioning

confidence: 99%

The mathematical structure of multiphase thermal models of flow in porous media

et al. 2008

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“…This system has applications to a variety of thermal oil recovery processes such as steam flooding and in situ combustion. Relevant work in this area can be found in Liu et al (2007), Huang et al (2007), Pasarai et al (2005), Nilsson et al (2005), Christensen et al (2004) and Kristensen et al (2009). Soil remediation is another important field in which thermal compositional solvers play a role (Class & Helmig 2002).…”

Section: Introductionmentioning

confidence: 99%

An efficient shock capturing scheme for multicomponent multiphase thermal flow in porous media

et al. 2012

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This paper is concerned with multicomponent, two-phase, thermal fluid flow in porous media. The fluid model consists of component conservation equations, Darcy's law for volumetric flow rates and an enthalpy conservation equation. The model is closed with an equation of state and phase equilibrium conditions that determine the distribution of the chemical components into phases. The sequential formulation described in a previous article is used to build a second-order shock capturing scheme for the conservation equations using a primitive-variable-based linear reconstruction. The fluxes at the cell faces are calculated using an approximate Riemann solver. The method is validated and evaluated by means of one-and two-dimensional problems, including a gravity inversion test.

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Numerical Simulation of 2D Hot Waterflooding Using Analytical Solutions Along Streamlines

Vicente

Priimenko

Pires

2014

SPE Latin America and Caribbean Petroleum Engineering Conference

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Streamline simulation is an alternative method to conventional finite difference methods, more suited to complex reservoir physics but limited in size by computational effort. The main feature of streamline modeling is replacing the space variable by the time-of-flight. In this approach, the fluid transport equation is solved along each streamline. This method is more attractive in convection-dominated flow and in large heterogeneous models. In high paraffinic oil reservoirs cold water flooding does not lead to satisfactory ultimate recovery factors due to the precipitation of solid paraffin from the liquid in the pore space. For this particular case, hot water flooding is an enhanced oil recovery technique option to increase oil production. In this work the process of displacement of waxy crude by a hot water slug followed by cold water drive in porous media was modeled. The liquid phase is composed by two pseudo-components, oil and paraffin. It was assumed that the viscosities of the components and paraffin concentration in the liquid phase are functions of temperature only. The simulations were run in 2D incompressible models without heat losses to adjacent layers and neglecting gravity and capillary effects. The system of hyperbolic equations that represents the mass conservation of each component was solved analytically. The solution of the continuous injection problem is self-similar, but in the case of slug injection interaction between waves of different families occurs. An important characteristic arising from the use of analytical solutions along streamlines is the ability to capture correctly the saturation and temperature shocks. Using analytical solutions along streamlines allowed to reduce the number of time steps and achieved results free of numerical diffusion. The results of streamline simulations were compared a commercial finite difference based simulator and presented close agreement with lower computational cost. The simulations were performed for two cases. The first one considers the injection of a high temperature water slug followed by water drive at the reservoir initial temperature. The second case analyzes the injection of a water slug at a lower temperature followed by water drive at a temperature higher than the reservoir temperature.

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A Simulator for Predicting Thermal Recovery Behavior Based on Streamline Method

Cited by 3 publications

References 0 publications

The mathematical structure of multiphase thermal models of flow in porous media

The mathematical structure of multiphase thermal models of flow in porous media

An efficient shock capturing scheme for multicomponent multiphase thermal flow in porous media

Numerical Simulation of 2D Hot Waterflooding Using Analytical Solutions Along Streamlines

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