Efficient Scheme for Chemical Flooding Simulation

Braconnier, Benjamin; Flauraud, E.; Nguyen, Quang Van

doi:10.2516/ogst/2013189

Cited by 18 publications

(7 citation statements)

References 12 publications

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“…In order to propose methods to improve this process, the mechanisms by which polymers increase the oil recovery should be firstly analyzed. For a long time it was considered that the polymer flooding only affected the macroscopic displacement [23,[105][106][107]. This was achieved by lowering the mobility ratio and avoiding the unstable flow Fig.…”

Section: Polymer Floodingmentioning

confidence: 99%

Chemical enhanced oil recovery and the role of chemical product design

2019

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Section: Polymer Floodingmentioning

confidence: 99%

Chemical enhanced oil recovery and the role of chemical product design

2019

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“…Thus, the mobility reduction R m is a function of the mobile polymer concentration C p w only. IFP Energies nouvelles reservoir simulator PumaFlow [25] is considered herein for the only purpose of demonstrating the results of this paper. To finish with, the water-oil capillary pressure is neglected in this work.…”

Section: Macroscopic Equations Underlying Polymer Flooding Models In mentioning

confidence: 99%

“…The mass conservation equation (1) involve the local and time-dependent adsorbed polymer mass fraction on the rock C p r which is computed from an equilibrium between rock and polymer solution that transports the mobile polymer mass fraction C p w . This equilibrium is driven by an adsorption function A which may depend on C p w and yields the adsorbed polymer mass per mass of rock (see [25] for more details). Irreversible and instantaneous polymer adsorption is modeled by setting A = A 0 where A 0 is a positive constant and denotes the rock adsorption capacity.…”

Section: Impact Of Mobility Reduction On Polymer Flooding Stabilitymentioning

confidence: 99%

Characterization of Viscous Fingering and Channeling for the Assessment of Polymer-Based Heavy Oil Displacements

et al. 2019

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The ability to determine a predictive stability criterion is of great practical importance for designing stable polymer-based displacements. Where one usually resorts to a limited number of core-scale experiments or coarse-scale reservoir simulations, the first ones are potentially impacted by lengthscale issues while the second ones possibly smooth out sharp displacing fronts and physical instability due to numerical diffusion. This paper proposes a new hydrodynamical stability criterion based on previous linear stability analysis results. This criterion is tested for 2D polymer oil displacement by performing high viscosity contrasts, high-resolution numerical experiments at pilot scale. We investigate mesh resolution issues and several perturbation ideas. Different factors are considered such as mobility ratios, polymer adsorption and degradation, and heterogeneities. The analysis is based on a combination of reservoir simulation and image processing techniques. We show the development of viscous fingering in homogeneous porous media is driven by the shock mobility ratio defined as the ratio of the total fluids upstream mobility over the total fluids downstream mobility. This stability criterion proves to predict both the polymer upstream and polymer-free downstream saturation fronts stability, typical of a polymer displacement, whether polymer adsorbs on the rock or degradates, or not. The observed fingers dynamical behavior is in line with previous works addressing single phase miscible flow or immiscible oil displacement in porous media: fingers transversally merge while growing in the flow direction. Time evolution of fingers spreading and number is linear. Investigation on porous media of variable heterogeneity distributions shows how viscous fingering couples with heterogeneity and leads to even more marked, distorded and unstable flow patterns. In that cases, flow patterns are not solely driven by the porous medium heterogeneity. The more unstable the flow is, the more sensitive it is to heterogeneity. In-depth fingers analysis shows a very specific time evolution behavior, quite different from viscous fingering in homogeneous media. Such a flow pattern is related with production data such

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“…This paper deals with the design of a numercial scheme devoted to the SWCTT method simulation to be integrated in industrial simulators. This scheme must rely on finite volume method because widely used by industrial simulators [4,5], must be almost easy to implement and must improve significantly the results accuracy in comparison with a first-order upwind scheme [5]. Regarding the flow model, we adopt a classical black-oil system [6] upgraded with the chemical tracers mole conservation, phase partitioning, adsorption, degradation and chemical reaction.…”

Section: Introductionmentioning

confidence: 99%

MUSCL scheme for Single Well Chemical Tracer Test simulation, design and interpretation

Braconnier

Preux

Douarche

et al. 2019

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Our paper presents an improved numerical scheme to simulate Single Well Chemical Tracer Test (SWCTT) method. SWCTT is mainly applied to determine the residual oil saturation of reservoirs. It consists in injecting an aqueous slug of a primary tracer into the reservoir formation and displacing it at a certain distance from the well. This tracer is partly miscible with oil on the one hand, and generates in situ a secondary tracer on the other hand. As a consequence, a shift is observed between the primary and the secondary tracers arrival times when production is resumed. This time shift is used to evaluate the residual oil saturation. In our paper, we propose a numerical scheme based on a fractional time stepping technique to decouple the resolution of the phases mass conservation equations and the chemical tracers mole conservation equations. For the phases resolution, we use an implicit scheme to ensure stability and robustness. For the chemical tracers, we propose an explicit second-order scheme in time and in space via MUSCL technique to improve the tracers time-shift calculation. The proposed numerical method is implemented on a realistic simulation model consisting of a vertical well crossing a reservoir consisting of a stack of homogeneous layers. By reducing the numerical dispersion, the proposed scheme improves the accuracy of predicted concentration profiles, without significantly increasing the computation time. Finally, the advantages of using a second-order scheme for residual oil saturation assessment are discussed on the basis of a radial 1D mesh convergence study.

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Efficient Scheme for Chemical Flooding Simulation

Cited by 18 publications

References 12 publications

Chemical enhanced oil recovery and the role of chemical product design

Chemical enhanced oil recovery and the role of chemical product design

Characterization of Viscous Fingering and Channeling for the Assessment of Polymer-Based Heavy Oil Displacements

MUSCL scheme for Single Well Chemical Tracer Test simulation, design and interpretation

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