Influence of polymer properties on selection of production strategy for a heavy oil field

Lamas, L. F.; Botechia, Vinícius Eduardo; Correia, Manuel Gomes; Schiozer, Denis José; Delshad, Mojdeh

doi:10.1016/j.petrol.2017.12.074

Cited by 9 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After comparing Figure 16c and Figure 10b, we observed that the polymer leading edge in the simulation, with a first-order dynamic degradation rate constant of 0.100 day −1 , was faster than that in the simulation without polymer degradation. The reason for this result is that a reduction in the polymer solution viscosity caused by polymer degradation led to an increase in the water-oil mobility ratio [53], resulting in the faster polymer leading edge. Figure 17 shows the 3D remaining oil saturation distribution after a cumulative injection volume of 1.67 PV of the simulation, with a first-order dynamic degradation rate constant of 0.100 day −1 .…”

Section: Resultsmentioning

confidence: 99%

Effect of Polymer Degradation on Polymer Flooding in Heterogeneous Reservoirs

Xin

Chen

et al. 2018

Polymers

View full text Add to dashboard Cite

Polymer degradation is critical for polymer flooding because it can significantly influence the viscosity of a polymer solution, which is a dominant property for polymer enhanced oil recovery (EOR). In this work, physical experiments and numerical simulations were both used to study partially hydrolyzed polyacrylamide (HPAM) degradation and its effect on polymer flooding in heterogeneous reservoirs. First, physical experiments were conducted to determine basic physicochemical properties of the polymer, including viscosity and degradation. Notably, a novel polymer dynamic degradation experiment was recommended in the evaluation process. Then, a new mathematical model was proposed and an in-house three-dimensional (3D) two-phase polymer flooding simulator was designed to examine both polymer static and dynamic degradation. The designed simulator was validated by comparison with the simulation results obtained from commercial software and the results from the polymer flooding experiments. This simulator further investigated and validated polymer degradation and its effect. The results of the physical experiments showed that the viscosity of a polymer solution increases with an increase in polymer concentration, demonstrating their underlying power law relationship. Moreover, the viscosity of a polymer solution with the same polymer concentration decreases with an increase in the shear rate, demonstrating shear thinning. Furthermore, the viscosity of a polymer solution decreased with an increase in time due to polymer degradation, exhibiting an exponential relationship. The first-order dynamic degradation rate constant of 0.0022 day−1 was greater than the first-order static degradation rate constant of 0.0017 day−1. According to the simulation results for the designed simulator, a 7.7% decrease in oil recovery, after a cumulative injection volume of 1.67 pore volume (PV) was observed between the first-order dynamic degradation rate constants of 0 and 0.1 day−1, which indicates that polymer degradation has a detrimental effect on polymer flooding efficiency.

show abstract

Section: Resultsmentioning

confidence: 99%

Effect of Polymer Degradation on Polymer Flooding in Heterogeneous Reservoirs

Xin

Chen

et al. 2018

Polymers

View full text Add to dashboard Cite

show abstract

“…Based on the technique of separate injection and the theory of solution shear degradation [21,22,23,24,25], the concept of the different medium injection tool is proposed, that is, a tool for active shearing of solution to solve the injection problem of a displacement agent in a low permeability oil layer [26,27,28,29] Huang et al [30] established a rheological model of polymer solution in the different medium injection tool by combining the rheological characteristics of polymer and local perturbation theory, and determined the maximum injection speed. Chen et al [31] and Huang et al [32] analyzed the flow characteristics of ASP solution in the different medium injection tool by finite element analysis.…”

Section: Introductionmentioning

confidence: 99%

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

Huang

et al. 2019

Polymers

View full text Add to dashboard Cite

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.

show abstract

Global enhanced oil recovery assessment: A comprehensive data-driven analysis using self-organizing maps

Niedermaier Custodio,

Carneiro

2024

Geoenergy Science and Engineering

View full text Add to dashboard Cite

Influence of polymer properties on selection of production strategy for a heavy oil field

Cited by 9 publications

References 6 publications

Effect of Polymer Degradation on Polymer Flooding in Heterogeneous Reservoirs

Effect of Polymer Degradation on Polymer Flooding in Heterogeneous Reservoirs

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

Global enhanced oil recovery assessment: A comprehensive data-driven analysis using self-organizing maps

Contact Info

Product

Resources

About