Computation of polymer in-situ rheology using direct numerical simulation

Zamani, Nematollah; Bondino, Igor; Kaufmann, Roland; Skauge, Arne

doi:10.1016/j.petrol.2017.09.011

Cited by 28 publications

(25 citation statements)

References 13 publications

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“…In contrast to the capillary bundle approach, pore network modeling envisages porous media as interconnected bundles with idealized geometries where larger pores (pore bodies) are connected via smaller ones (pore throats). Pore network models have been used by Sorbie et al [20] to study non-Newtonian fluids that exhibit shear thinning properties; later, several authors studied these phenomena [21,[32][33][34][35]. Using network modeling, Sorbie et al [20] showed that in connected (2D) networks of porous media, the average shear rate in the network correlates linearly with the flow rate.…”

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confidence: 99%

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Polymer Flow in Porous Media: Relevance to Enhanced Oil Recovery

Skauge

Zamani

Jacobsen

et al. 2018

Colloids and Interfaces

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Polymer flooding is one of the most successful chemical EOR (enhanced oil recovery) methods, and is primarily implemented to accelerate oil production by sweep improvement. However, additional benefits have extended the utility of polymer flooding. During the last decade, it has been evaluated for use in an increasing number of fields, both offshore and onshore. This is a consequence of (1) improved polymer properties, which extend their use to HTHS (high temperature high salinity) conditions and (2) increased understanding of flow mechanisms such as those for heavy oil mobilization. A key requirement for studying polymer performance is the control and prediction of in-situ porous medium rheology. The first part of this paper reviews recent developments in polymer flow in porous medium, with a focus on polymer in-situ rheology and injectivity. The second part of this paper reports polymer flow experiments conducted using the most widely applied polymer for EOR processes, HPAM (partially hydrolyzed polyacrylamide). The experiments addressed highrate, near-wellbore behavior (radial flow), reservoir rate steady-state flow (linear flow) and the differences observed in terms of flow conditions. In addition, the impact of oil on polymer rheology was investigated and compared to single-phase polymer flow in Bentheimer sandstone rock material. Results show that the presence of oil leads to a reduction in apparent viscosity.

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“…Zamani et al [35] studied the effects of rock microstructures on in-situ rheology using digital rock physics and reported that microscopic properties such as aspect ratio, coordination number and tortuosity may affect deviation of in-situ from bulk rheology.…”

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confidence: 99%

Polymer Flow in Porous Media: Relevance to Enhanced Oil Recovery

Skauge

Zamani

Jacobsen

et al. 2018

Colloids and Interfaces

Self Cite

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“…Viscoelasticity is an important characteristic in the performance of solutions. It usually refers to the obvious viscous and elastic characteristics when multiple macromolecular motion units respond to forces [61,62,63,64,65,66]. At present, there are mainly two methods for measuring solution viscoelasticity: steady shear test and dynamic mechanical test.…”

Section: Resultsmentioning

confidence: 99%

Molecular Morphology and Viscoelasticity of ASP Solution under the Action of a Different Medium Injection Tool

Huang

et al. 2019

Polymers

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In order to improve the oil displacement effect of alkali/surfactant/polymer (ASP) solution in low-permeability oil layers, Daqing Oilfield has proposed a separate injection technology. The objective of separate injection technology is to reduce the viscosity of ASP solution through a different medium injection tool and increase the injection amount of ASP solution in low permeability oil layer, thus improving the oil displacement effect. In order to study the effect of the different medium injection tool on ASP solution, SEM is used to observe the changes in molecular micromorphology before and after the ASP solution flows through the tool. Then, the influence of the tool on viscosity and the first normal stress difference of the solution are studied through static shear experiments. Finally, the storage and loss modulus of the solution are measured through dynamic mechanical experiments and the relaxation time and zero shear viscosity of the solution are verified and compared. The results show that molecular chains are obviously broken and the grid structure is destroyed after the ASP solution is acted on by the different medium injection tool. The viscosity and elasticity of ASP solution decrease, and the influence degree of the different medium injection tool on viscosity is greater than elasticity. The results of the steady shear experiment and dynamic mechanics experiment are consistent. Therefore, the different medium injection tool can achieve the purpose of use, which is conducive to the injection of displacement fluid into low-permeability oil layers and enhance the recovery ratio.

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“…Several studies on rheological behavior and flow properties in aqueous solutions were reported in the literature [8][9][10][11]. In situ-rheology using direct numerical simulation has also been studied [12]. Polymer flooding was reported in the literature and has currently been undergoing successful research steps for a long time with encouraging results produced by several studies for San Francisco and Huntington Beach in the USA, Taber South, in Canada, and Bohai Bay and Daqing, in China [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Biopolymer Solution Evaluation Methodology: Thermal and Mechanical Assessment for Enhanced Oil Recovery with High Salinity Brines

et al. 2019

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The methodology to study an eco-friendly and non-toxic, Schizophyllan, biopolymer for enhanced oil recovery (EOR) polymer flooding is described. The methodology is divided into two parts; the first part estimates the molar concentration of the biopolymer, which is needed to prepare the biopolymer solution with optimal viscosity. This is required to improve the sweep efficiency for the selected reservoir in Kuwait. The second part of this generalized methodology evaluates the biopolymer solution capability to resist degradation and maintain its essential properties with the selected reservoir conditions. The evaluation process includes thermal and mechanical assessment. Furthermore, to study the biopolymer solution behavior in both selected reservoir and extreme conditions, the biopolymer solution samples were prepared using 180 g/L and 309 g/L brine. It was found that the prepared biopolymer solution demonstrated great capability in maintaining its properties; and therefore, can be introduced as a strong candidate for EOR polymer flooding with high salinity brines.

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Computation of polymer in-situ rheology using direct numerical simulation

Cited by 28 publications

References 13 publications

Polymer Flow in Porous Media: Relevance to Enhanced Oil Recovery

Polymer Flow in Porous Media: Relevance to Enhanced Oil Recovery

Molecular Morphology and Viscoelasticity of ASP Solution under the Action of a Different Medium Injection Tool

Biopolymer Solution Evaluation Methodology: Thermal and Mechanical Assessment for Enhanced Oil Recovery with High Salinity Brines

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