Effect of viscoelasticity on the filtration loss characteristics of aqueous polymer solutions

Dehghanpour, Hassan; Kuru, Ergün

doi:10.1016/j.petrol.2010.12.005

Cited by 22 publications

(7 citation statements)

References 22 publications

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“…After adding distilled water, an outstanding gelled structure was formed ( Figure 8 b), suggesting polymer–water hydrogen bonding due to the amphiphilic character of PNIPAM. The literature states that filtration of a polymer-based fluid through a porous medium can be considerably reduced by increasing the elastic properties of the polymer [ 36 ]. The insertion of flexible PNIPAM chain grafts in the rigid structure of cellulose nanocrystals may produce the extensional viscosity needed to support the shear imposed during the filtration process at high pressure.…”

Section: Resultsmentioning

confidence: 99%

Polymer-Decorated Cellulose Nanocrystals as Environmentally Friendly Additives for Olefin-Based Drilling Fluids

Pinheiro

Marques

Villetti

et al. 2020

IJMS

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In this study, we intended to evaluate the performance of olefin-based drilling fluids after addition of cellulose nanocrystal (CNC) derivatives. For this purpose, firstly, cellulose nanocrystals, produced from sulfuric acid hydrolysis of cotton fibers, were functionalized with poly(N-isopropylacrylamide) (PNIPAM) chains via free radicals. The samples were then characterized via Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), confocal microscopy, dynamic light scattering (DLS), and zeta potential measurements in water. The FTIR and NMR spectra exhibited the characteristic signals of CNC and PNIPAM groups, indicating successful grafting. As expected, X-ray diffractograms showed that the crystallinity of CNCs reduces after chemical modification. TGA revealed that the surface-functionalized CNCs present higher thermal stability than pure CNCs. The confocal microscopy, zeta potential, and DLS results were consistent with the behavior of cellulose nanocrystals decorated by a shell of PNIPAM chains. The fluids with a small amount of modified CNCs presented a much lower volume of filtrate after high-temperature and high-pressure (HTHP) filtration tests than the corresponding standard fluid, indicating the applicability of the environmentally friendly particles for olefin-based drilling fluids.

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Section: Resultsmentioning

confidence: 99%

Polymer-Decorated Cellulose Nanocrystals as Environmentally Friendly Additives for Olefin-Based Drilling Fluids

Pinheiro

Marques

Villetti

et al. 2020

IJMS

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“…The non‐Newtonian behavior of polymer solutions influences the flow resistance in porous media. [ 43 , 184 ] The equation describing the flow of non‐Newtonian fluids in a porous medium has to consider the viscosity as a variable parameter and depends on the actual flow conditions through the porous medium. [169] Some authors have proposed equations to describe the flow of non‐Newtonian fluids in porous medium.…”

Section: Effect Of Polymer Solution Viscosity For Plastic Purification Recycling Processesmentioning

confidence: 99%

State‐Of‐The‐Art Quantification of Polymer Solution Viscosity for Plastic Waste Recycling

et al. 2021

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Solvent-based recycling is a promising approach for closed-loop recovery of plastic-containing waste. It avoids the energy cost to depolymerize the plastic but still allows to clean the polymer of contaminants and additives. However, viscosity plays an important role in handling the polymer solutions at high concentrations and in the cleaning steps. This Review addresses the viscosity behavior of polymer solutions, available data, and (mostly algebraic) models developed. The non-Newtonian viscosity models, such as the Carreau and Yasuda-Cohen-Armstrong models, pragmatically describe the viscosity of polymer solutions at different concentrations and shear rate ranges. This Review also describes how viscosity influences filtration and centrifugation processes, which are crucial steps in the cleaning of the polymer and includes a polystyrene/ styrene case study.

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“…Consequently, this can result in a higher pressure drop and thus minimize the invasion of the fluid into the formation (Martins et al 2005, Blanco et al 2007, Dehghanpour and Kuru 2011. This is because the elastic component is related to the ability to maintain solids in suspension, as well as to provide greater resistance to the flow in the porous medium.…”

Section: Conceptsmentioning

confidence: 99%

Rheological Roles on the Dynamic Behavior of Drill-in Fluid Invasion and Oil Permeability Restoration of the Damage Zone

Moreno

Silveira

2013

All Days

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The formation damage caused by drilling fluid invasion around the wellbore reduces well productivity and changes the reservoir's original characteristics. In this context, drilling fluids specifically designed to perforate pay-zone, known as reservoir drill-in fluids, have been studied to optimize the drilling process and minimize formation damage. This work aimed to evaluate the brine-polymer drill-in fluids rheological behavior, invasion profiles of fluids and formation damage in carbonate and sandstone samples. For this purpose, polymer solutions was prepared using natural (XG) or synthetic (HPAM) polymers, solid-free or including CaCO 3 as bridging agent. Rheological and statistical analyses were performed. In addition, invasion lab tests at constant pressure, followed by oil backflow, were run to represent, respectively, the processes of an overbalanced drilling and a natural clean-up. The displacement tests were performed using carbonate and sandstone samples at connate water saturation and the results were compared. Through rheological evaluation and statistic analysis, the polymer and its concentration were confirmed as the main regulators of viscoelastic characteristics and consistency index for XG formulations, while the CaCO 3 addition caused significant changes only on HPAM formulations. The data of flow dynamics on carbonate samples pointed out that the oil productivity ratio (PR) was more reduced using XG fluid than HPAM one. This behavior was attributed to the higher elastic characteristics and consistency index of the fluid with XG, which provides higher flow resistance. These results were more significant when the CaCO 3 was added to the formulation, i.e., the formation of a filter-cake led to a complete reduction of PR. Comparing the influence of the rock matrix, HPAM fluids invasion was faster for the carbonate sample than for the sandstone one, possibly owing to differences in wettability and heterogeneity as mentioned in the literature. During the clean-up process, all samples showed oil permeability or productivity ratio restoration, but at different rates and cumulative oil volume flooding.

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Effect of viscoelasticity on the filtration loss characteristics of aqueous polymer solutions

Cited by 22 publications

References 22 publications

Polymer-Decorated Cellulose Nanocrystals as Environmentally Friendly Additives for Olefin-Based Drilling Fluids

Polymer-Decorated Cellulose Nanocrystals as Environmentally Friendly Additives for Olefin-Based Drilling Fluids

State‐Of‐The‐Art Quantification of Polymer Solution Viscosity for Plastic Waste Recycling

Rheological Roles on the Dynamic Behavior of Drill-in Fluid Invasion and Oil Permeability Restoration of the Damage Zone

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